We claim:
1. A nucleic acid probe for detecting hybridization of unlabeled nucleic acid comprising:
an oligonucleotide having
(a) a surface-coupling group,
(b) a first sequence called the loop sequence that is complementary to a target nucleic acid sequence;
(c) a second and a third sequence, located on opposite ends of the loop sequence and which can hybridize to each other in the absence of the target nucleic acid sequence to form what is called a stem structure, wherein said stem structure contains a restriction enzyme cleavage site that is not present in the loop sequence (b) when hybridized to the target nucleic acid sequence; and
(d) a label located on the opposite side of the restriction site from the surface-coupling group such that cleavage by restriction enzyme specific for the restriction site of the stem sequences detaches the label from the surface;
wherein said loop sequence makes up all, or part, of the nucleotides between the complementary sequences, and wherein hybridization of the fully complementary target nucleic acid to the loop sequence breaks the intramolecular hybridization bonds of the stem structure and removes the restriction site.
2. The nucleic acid probe of claim 1, wherein the label is a bioluminescent, chemiluminescent, radioisotopic, isotopic, enzymatic, chromogenic, fluorescent or antibody label.
3. The nucleic acid probe of claim 2, wherein the bioluminescent label is luciferase, aequorin, alkaline phosphatase, horseradish peroxidase or galactosidase.
4. The nucleic acid probe of claim 2, wherein the chemiluminescent label is acridinium.
5. The nucleic acid probe of claim 1, wherein the restriction enzyme recognition site is 4 to 8 nucleic acid bases in length.
6. The nucleic acid probe of claim 1, wherein the restriction enzyme site is specifically cleaved by a restriction enzyme selected from the group consisting of AaaI, AatI, AatII, AbeI, AbrI, Acc16I, Acc65I, AccB1I, AccB2I, AccBSI, AccEBI, AccI, AccII, AccIII, AceI, AceII, AciI, AcpI, AcrII, AcyI, AeuI, Afa16RI, Afa22MI, AfaI, AfeI, AflI, AflIII, AgeI, AhaB8I, AhaI, AhaII, AhyI, AitI, AjoI, AliAJI, AliI, AluI, Alw21I, Alw44I, Ama87I, AocI, AocII, Aor13HI, Aor51HI, AorI, AosI, AosII, ApaCI, ApaI, ApaLI, ApaORI, ApiI, ApyI, AquI, AscI, AseII, AsiAI, AsiI Bce751I, AsiSI, Asp10HI, Asp713I, Asp718I, Asp745I, AspAI, AspHI, AspLEI, AspMDI, AspMI, AspNI, AspS9I, AstWI, AsuC2I, AsuI, AsuII, AsuIII, AsuNHI, AvaI, AvaII, AvcI, AviII, AvrBII, AvrII, AxyI, Bac36I, Bal228I, BalI, BamHI, BamNxI, BanI, BanII, BavAI, BavAII, BavBI, BavBII, BavI, BbeI, Bbi24I, BbiII, BbrPI, BbuI, Bbv12I, BbvAIII, BbvBI, BbvCI, Bca77I, Bce22I, Bce243I, BceBI, BciBII, BcnI, Bco118I, Bco27I, BcoAI, BcoI, BcuAI, BdiSI, BecAII, BepI, BetI, BfaI, Bfi57I, Bfi89I, BfmI, Bim19I, Bim19II, BimI, BliHKI, BlnI, BloHI, BlpI, BluI, Bme12I, Bme1390I, Bme142I, Bme18I, Bme216I, Bme361I, BmyI, BnaI, Bpu10I, Bpu1102I, Bpu14I, Bpu95I, BpuB51I, BpuDI, BpuI, BsaAI, BsaHI, BsaJI, BsaOI, BsaWI, BscBI, BscFI, Bse118I, Bse15I, Bse16I, Bse17I, Bse1I, Bse1I, Bse21I, Bse24I, Bse634I, Bse64I, BseAI, BseBI, BseDI, BseGI, BseGI, BseNI, BseNI, BsePI, BseQI, BseSI, BseT10I, BseT9I, BseX3I, Bsh1236I, Bsh1285I, Bsh45I, BshFI, BshGI, BshI, BshKI, BshNI, BshTI, BsiCI, BsiEI, BsiHKAI, BsiI, BsiKI, BsiLI, BsiMI, BsiSI, BsiWI, BsiZI, BsmSI, BsoBI, BsoCI, BsoFI, Bsp105I, Bsp119I, Bsp120I, Bsp123I, Bsp1286I, Bsp13I, Bsp143I, Bsp143II, Bsp153AI, Bsp1720I, Bsp1894I, Bsp19I, Bsp2095I, Bsp211, Bsp4009I, Bsp50I, Bsp519I, Bsp63I, Bsp67I, Bsp68I, Bsp6I, Bsp98I, BspA2I, BspAAI, BspAAIII, BspAI, BspBI, BspBII, BspBRI, BspCI, BspEI, BspF4I, BspFI BspJI, BspKI, BspKT6I, BspLAI, BspLAII, BspLI, BspLS2I, BspM39I, BspMII, BspMKI, BspNI, BspO4I, BspR7I, BspRI, BspT104I, BspT107I, BsrAI, BsrBI, BsrFI, BsrI, BsrI, BsrSI, BsrSI, BssAI, BssECI, BssHI, BssHII, BssKI, BssSI, BssTII, Bst100I, Bst11I, Bst11I, Bst1I, Bst2BI, Bst2I, Bst2UI, Bst31NI, Bst38I, Bst40I, Bst4CI, BstACI, BstB7SI, BstBAI, BstBI, BstBZ153I, BstD102I, BstDEI, BstDSI, BstEII, BstENII, BstF5I, BstF5I, BstFNI, BstH2I, BstHHI, BstHZ55I, BstI, BstJZ301I, BstM6I, BstMCI, BstMZ611I, BstNI, BstNSI, BstOI, BstPI, BstSFI, BstSI, BstT10I, BstT9I, BstUI, BstVI, BstX2I, BstXI, BstYI, BstZI, Bsu1532I, Bsu1854I, Bsu23I, Bsu36I, Bsu54I, BsuBI, BsuFI, BsuRI, BteI, BtgI, BthAI, BthDI, BthEI, BtkI, BtkII, BtrI, BtsI, BvuBI, BvuI, Cac8I, CacI, CauB3I, CauI, CauII, CbiI, CboI, CbrI, CciNI, CcoI, CcrI, CcuI, CcyI, CelI, CelII, CflI, CfoI, Cfr10I, Cfr13I, Cfr42I, Cfr6I, Cfr9I, CfrA4I, CfrBI, CfrI, CfrJ4I, CfuII, ChaI, CltI, CpfI, CpoI, CscI, Csp45I, Csp68KI, Csp68KII, Csp68KVI, Csp6I, CspAI, CspBI, CspI, CspKVI, CstI, CthII, CviAI, CviAII, CviBI, CviJI, CviQI, CvIRI, CviRII, CviTI, CvnI, DdeI, DmaI, DpnII, DraII, DsaI, DsaII, DsaIII, DsaIV, DsaV, Eae46I, EaeAI, EaeI, EagBI, EagI, EagMI, EcaI, Eci125I, EciI, Ecl136II, Ecl18kI, Ecl2zI, Ecl37kI, EclRI, EclXI, Eco130I, Eco137kI, Eco13kI, Eco147I, Eco1831I, Eco21kI, Eco24I, Eco27kI, Eco29kI, Eco47I, Eco47III, Eco52I, Eco53kI, Eco56I, Eco64I, Eco72I, Eco75KI, Eco78I, Eco81I, Eco88I, Eco91I, EcoHI, EcoHK31I, EcoICRI, EcoO109I, EcoO128I, EcoO65I, EcoRII, EcoT14I, EcoT38I, EgeI, EheI, ErhB9I, ErhB9II, ErhI, ErpI, EspI, FauBII, FblI, FbrI, FdiI, FdiII, FgoI, FmuI, Fnu4HI, FnuAI, FnuCI, FnuDI, FnuDII, FnuDIII, FnuEI, FriOI, FseI, Fsp1604I, Fsp4HI, FspI, FspII, FspMSI, FssI, FunI, GalI, GceGLI, GceI, GdiI, GdiII, HacI, HaeI, HaeII, HaeIII, HalII, HapII, HgiAI, HgiBI, HgiCI, HgiCII, HgiCIII, HgiDI, HgiDII, HgiEI, HgiGI, HgiHI, HgiHII, HgiHIII, HgiI, HgiJI, HgiJII, HgiS22I, HhaI, HhaII, Hin1I, Hin1II, Hin2I, Hin6I, HincII, HindII, HinfI, HinJCI, HinP1I, HpaII, Hpy178III, Hpy188I, Hpy188III, Hpy51I, Hpy8I, Hpy99I, HpyBI, HpyBII, HpyCH4I, HpyCH4III, HpyCH4IV, HpyCH4V, HsoI, Hsp92I, Hsp92II, HspAI, ItaI, KasI, Kaz48kI, KoxII, Kpn2I, Kpn2kI, Kpn378I, Kpn49kII, KpnI, KspI, Kzo49I, Kzo9I, LlaAI, LlaBI, Lmu60I, LpnI, LspI, MabI, MaeI, MaeII, MaeIII, MaeK81I, MaeK81II, MavI, MbiI, MboI, MchAI, MchAII, MchI, McrI, MflI, MfoAI, Mgl14481I, MgoI, MhaAI, MhlI, MkrAI, MlaAI, MlaI, MlsI, MltI, Mlu23I, Mlu31I, MluB2I, MluI, MluNI, Mly113I, MnoI, MroI, MroNI, MscI, Msp17I, Msp67I, MspA1I, MspB4I, MspI, MspR9I, MspV281I, MspYI, MstI, MstII, MthZI, MvaI, MvnI, MvrI, MxaI, NaeI, NarI, NblI, NciI, NcoI, NdaI, NdeII, NgoAIII, NgoAIV, NgoMIV, NgoPII, NgoPIII, NheI, NlaII, NlaIII, NlaIV, Nli3877I, NmeCI, NmeRI, NmuCI, NopI, NotI, NphI, NruI, NsbI, Nsp29132II, Nsp7121I, NspBII, NspHI, NspI, NspII, NspIII, NspIV, NspLKI, NspSAI, NspSAII, NspSAIV, NspV, NunII, OkrAI, OxaNI, Pac25I, Pae14kI, Pae17kI, Pae5kI, PaeAI, PaeBI, PaeHI, PaeI, PaePI, PaeQI, PaeR7I, PalI, PamI, PamII, PanI, PauAI, PauI, Pde12I, Pde133I, Pde137I, PdiI, PfaAI, PfaAIII, Pfl21I, Pfl23II, Pfl27I, Pfl8I, PflKI, PinAI, PinBII, PlaAI, PlaAII, PlaI, PlaII, Ple19I Psu161I, PmaCI, Pme55I, PmiI, PpaAI, PpaAII, PpeI, PpuAI, PpuMI, PpuXI, Psp03I, Psp124BI, Psp23I, Psp5II, PspAI, PspALI, PspEI, PspGI, PspLI, PspN4I, PspOMI, PspPI, PspPPI, PssI, PstI, PstNHI, PsuAI, PsuI, PtaI, PunAI, PunAII, Pvu84II, PvuI, PvuII, RalF40I, RflFI, RmaI, RsaI, RshI, RspLKI, RspLKII, Rsr2I, RsrII, Rtr63I, RtrI, SacI, SacII, SacNI, SalI, SalPI, SanDI, SarI, SatI, Sau3239I, Sau3AI, Sau96I, SauBMKI, SauHPI, SauI, SauLPI, SauLPII, SauMI, SauNI, SauSI, SbfI, Sbi68I, Sbo13I, SbvI, SceIII, SchZI, SciI, SciNI, ScrFI, SdaI, SduI, SecI, SelI, SenPT14bI, SenPT16I, SexAI, SexBI, SexCI, SfaI, SfcI, SfeI, SflI, SfoI, Sfr274I, Sfr303I, SfuI, SgfI, SgrAI, SgrBI, SimI, SinI, SlaI, SleI, Slu1777I, SmaI, SmlI, SmuEI, SniI, SnoI, Sol10179I, SolI, SpaHI, SphI, SplI, SpoI, SpuI, SrfI, SrlI, Sru30DI, SscL1I, Sse1825I, Sse232I, Sse8387I, SseAI, SseBI, SshAI, SslI, SsoII, Ssp1I, Ssp5230I, SspAI, SspI, SspRFI, SstI, SstII, SteI, Sth1171I, Sth134I, Sth368I, SthI, StrI, StuI, StyD4I, StyI, SuaI, SunI, SurI, SviI, TaaI, TaiI, Taq52I, TaqI, TaqXI, TauI, ThaI, TliI, Tru201I, TscI, TseI, Tsp1I, Tsp1I, Tsp32I, Tsp32II, Tsp45I, Tsp49I, Tsp4CI, TspBI, TthHB8I, UnbI, Uur960I, VneI, VpaK11AI, VpaK11BI, XceI, XciI, XcyI, XhoI, XhoII, XmaCI, XmaI, XmaIII, XmaJI, XmiI, XorII, XpaI, XspI, YenI, and ZanI.
7. The nucleic acid probe of claim 1, wherein the surface coupling group is a covalent coupling group.
8. The nucleic acid probe of claim 1, wherein the label is attached to the oligonucleotide through a biotin-steptavidin coupling.
9. The nucleic acid probe of claim 1, wherein the oligonucleotide contains spacer groups at either or both ends.
10. The nucleic acid probe of claim 9, wherein the spacer groups are polythymine spacers.
11. The nucleic acid probe of claim 7, wherein the covalent surface coupling group is an aminopropanol moiety.
12. The nucleic acid probe of claim 7, wherein the oligonucleotide is attached to a surface with the covalent coupling group.
13. The nucleic acid probe of claim 12, wherein the surface is a glass, silicon, gold, metal or plastic surface.
14. The nucleotide probe of claim 1, wherein the loop sequence is 16 to 25 nucleotides in length.
15. A method of determining the presence of a target nucleic acid comprising:
exposing a sample to a nucleic acid probe of claim 1 under effective conditions for specific hybridization of the target nucleic acid to the nucleic acid probe;
adding restriction enzyme specific for the restriction site contained in the stem structure and under conditions to cleave the nucleic acid probe with the restriction enzyme;
determining the presence of the target nucleic acid, wherein the presence or amount of label is indicative of the presence of target nucleic acid.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A wireless power supply transmitter configured to transmit an electric power signal comprising any one from among an electric field, a magnetic field, and an electromagnetic field to a wireless power receiver, the wireless power supply transmitter comprising:
a transmission antenna comprising a transmission coil;
a power supply configured to apply an AC driving voltage between both ends of the transmission antenna; and
an automatic tuning assist circuit coupled with the transmission antenna, and configured to inject a first correction current into, or otherwise to draw a first correction current from, the transmission antenna,
wherein the automatic tuning assist circuit comprises a first auxiliary coil,
and wherein the automatic tuning assist circuit is configured to alternately switch between (1) a state in which the first auxiliary coil is coupled with the transmission antenna, and the first correction current that corresponds to a current that flows through the first auxiliary coil is injected into or otherwise drawn from the transmission antenna, and (2) a state in which the first auxiliary coil is decoupled from the transmission antenna, and the current that flows through the first auxiliary coil flows through a current path which is independent of the transmission antenna.
2. The wireless power supply transmitter according to claim 1, wherein the state is switched between the first state and the second state with the same frequency as that of the driving voltage, or otherwise with a frequency obtained by multiplying or otherwise by dividing the frequency of the driving voltage by an odd number.
3. The wireless power supply transmitter according to claim 1, further comprising a control unit configured to switch the state between the first state and the second state with a predetermined phase difference with reference to the driving voltage.
4. The wireless power supply transmitter according to claim 1, wherein the automatic tuning assist circuit further comprises:
a first terminal and a second terminal coupled with the transmission antenna;
a first switch configured to turn on in the first state, and a first auxiliary coil, which are arranged in series between the first terminal and the second terminal; and
a second switch arranged in parallel with the first auxiliary coil, and configured to turn on in the second state.
5. The wireless power supply transmitter according to claim 4, wherein the first switch and the second switch each comprise:
a uni-directional switch; and
a rectifier diode arranged in series with the uni-directional switch in a direction that is the reverse of the forward direction of an inversely conducting element formed in the uni-directional switch.
6. The wireless power supply transmitter according to claim 4, wherein the first switch and the second switch are each configured as a bi-directional switch.
7. The wireless power supply transmitter according to claim 1, wherein the automatic tuning assist circuit comprises a second auxiliary coil,
and wherein, in the first state, the second auxiliary coil is decoupled from the transmission antenna, and a current that flows through the second auxiliary coil flows through a current path which is independent of the transmission antenna,
and wherein, in the second state, the second auxiliary coil is coupled with the transmission antenna, and a second correction current that corresponds to the current that flows through the second auxiliary coil is injected into or otherwise drawn from the transmission antenna.
8. The wireless power supply transmitter according to claim 7, wherein the automatic tuning assist circuit comprises:
a first terminal and a second terminal coupled with the transmission antenna;
a first switch configured to turn on in the first state, and a first auxiliary coil, which are arranged in series between the first terminal and the second terminal;
a second switch arranged in parallel with the first auxiliary coil, and configured to turn on in the second state;
a third switch configured to turn on in the second state, and a second auxiliary coil, which are arranged in series between the first terminal and the second terminal; and
a fourth switch arranged in parallel with the second auxiliary coil, and configured to turn on in the first state.
9. A wireless power supply transmitter configured to transmit an electric power signal comprising any one from among an electric field, a magnetic field, and an electromagnetic field to a wireless power receiver, the wireless power supply transmitter comprising:
a transmission antenna comprising a transmission coil;
a power supply configured to apply an AC driving voltage between both ends of the transmission antenna; and
an automatic tuning assist circuit coupled with the transmission antenna,
wherein the automatic tuning assist circuit comprises:
a first terminal and a second terminal coupled with the transmission antenna;
a first switch and a first auxiliary coil arranged in series between the first terminal and the second terminal;
a second switch arranged in parallel with the first auxiliary coil; and
a control unit configured to switch a state between a first state in which the first switch is turned on and a second state in which the second switch is turned on.
10. The wireless power supply transmitter according to claim 9, wherein the control unit is configured to switch the state between the first state and the second state with the same frequency as that of the driving voltage, or otherwise with a frequency obtained by multiplying or otherwise dividing the frequency of the driving voltage by an odd number.
11. The wireless power supply transmitter according to claim 9, wherein the automatic tuning assist circuit further comprises:
a third switch and a second auxiliary coil arranged in series between the first terminal and the second terminal; and
a fourth switch arranged in parallel with the second auxiliary coil,
wherein the control unit is configured to turn on the fourth switch in the first state, and to turn on the third switch in the second state.
12. The wireless power supply transmitter according to claim 1, wherein the automatic tuning assist circuit is directly coupled with the transmission antenna.
13. The wireless power supply transmitter according to claim 1, wherein the automatic tuning assist circuit is coupled with the transmission antenna via a transformer.
14. The wireless power supply transmitter according to claim 3, wherein the first terminal is connected to one end of the transmission coil, and the second terminal is connected to the other end of the transmission coil.
15. The wireless power supply transmitter according to claim 3, wherein the transmission antenna further comprises a resonance capacitor arranged in series with the transmission coil,
and wherein the first terminal is connected to one end of the resonance capacitor, and the second terminal is connected to the other end of the resonance capacitor.
16. The wireless power supply transmitter according to claim 3, wherein a tap is provided to the transmission coil,
and wherein the first terminal is connected to the tap,
and wherein the second terminal is connected to one end of the transmission coil.
17. The wireless power supply transmitter according to claim 3, wherein the transmission antenna further comprises two resonance capacitors arranged in series with the transmission coil,
and wherein the first terminal is connected to one end of one of the resonance capacitors, and the second terminal is connected to the other end of the aforementioned one resonance capacitor.
18. The wireless power supply transmitter according to claim 3, further comprising a first coil magnetically coupled with the transmission coil,
wherein the first terminal is connected to one end of the first coil, and the second terminal is connected to the other end of the first coil.
19. The wireless power supply transmitter according to claim 3, further comprising a transformer having a primary winding arranged in series with the transmission antenna,
wherein the first terminal is connected to one end of a secondary winding of the transformer, and the second terminal is connected to the other end of the secondary winding of the transformer.
20. A wireless power supply system comprising:
the wireless power supply transmitter according to claim 1, configured to transmit an electric power signal comprising any one from among an electric field, a magnetic field, and an electromagnetic field; and
a wireless power receiver configured to receive the electric power signal from the wireless power supply transmitter.
21. A wireless power receiver configured to receive an electric power signal comprising any one from among an electric field, a magnetic field, and an electromagnetic field, transmitted from a wireless power supply transmitter, the wireless power receiver comprising:
a reception antenna comprising a reception coil; and
an automatic tuning assist circuit coupled with the reception antenna, and configured to inject a first correction current into, or otherwise draw a first correction current from, the reception antenna,
wherein the automatic tuning assist circuit comprises a first auxiliary coil,
and wherein the automatic tuning assist circuit is configured to alternately switch between (1) a state in which the first auxiliary coil is coupled with the reception antenna, and the first correction current that corresponds to a current that flows through the first auxiliary coil is injected into or otherwise drawn from the reception antenna and (2) a state in which the first auxiliary coil is decoupled from the reception antenna, and the current that flows through the first auxiliary coil flows through a current path which is independent of the reception antenna.
22. The wireless power receiver according to claim 21, wherein the state is switched between the first state and the second state with the same frequency as that of the electric power signal, or otherwise with a frequency obtained by multiplying or otherwise dividing the frequency of the electric power signal by an odd number.
23. The wireless power supply transmitter according to claim 21, wherein the automatic tuning assist circuit is configured to switch the state between the first state and the second state with the same frequency as that of a driving voltage applied to a transmission antenna included in the wireless power supply transmitter, and with a predetermined phase difference with respect to the driving voltage.
24. The wireless power receiver according to claim 21, wherein the automatic tuning assist circuit further comprises:
a first terminal and a second terminal coupled with the reception antenna;
a fifth switch configured to turn on in the first state, and a first auxiliary coil, which are arranged in series between the first terminal and the second terminal; and
a sixth switch arranged in parallel with the first auxiliary coil, and configured to turn on in the second state.
25. The wireless power receiver according to claim 24, wherein the fifth switch and the sixth switch each comprise:
a uni-directional switch; and
a rectifier diode arranged in series with the uni-directional switch in a direction that is the reverse of the forward direction of an inversely conducting element formed in the uni-directional switch.
26. The wireless power receiver according to claim 24, wherein the fifth switch and the sixth switch are each configured as a bi-directional switch.
27. The wireless power receiver according to claim 21, wherein the automatic tuning assist circuit comprises a second auxiliary coil,
and wherein, in the first state, the second auxiliary coil is decoupled from the reception antenna, and a current that flows through the second auxiliary coil flows through a current path which is independent of the reception antenna,
and wherein, in the second state, the second auxiliary coil is coupled with the reception antenna, and a second correction current that corresponds to the current that flows through the second auxiliary coil is injected into or otherwise drawn from the reception antenna.
28. The wireless power receiver according to claim 27, wherein the automatic tuning assist circuit comprises:
a first terminal and a second terminal coupled with the reception antenna;
a fifth switch configured to turn on in the first state, and a first auxiliary coil, which are arranged in series between the first terminal and the second terminal;
a sixth switch arranged in parallel with the first auxiliary coil, and configured to turn on in the second state;
a seventh switch configured to turned on in the second state, and a second auxiliary coil, which are arranged in series between the first terminal and the second terminal; and
an eighth switch arranged in parallel with the second auxiliary coil, and configured to turn on in the first state.
29. A wireless power receiver configured to receive an electric power signal comprising any one from among an electric field, a magnetic field, and an electromagnetic field, transmitted from a wireless power supply transmitter, the wireless power receiver comprising:
a reception antenna comprising a reception coil; and
an automatic tuning assist circuit coupled with the reception antenna,
wherein the automatic tuning assist circuit comprises:
a first terminal and a second terminal coupled with the reception antenna;
a fifth switch and a first auxiliary coil arranged in series between the first terminal and the second terminal;
a sixth switch arranged in parallel with the first auxiliary coil; and
a control unit configured to switch a state between a first state in which the fifth switch is turned on and a second state in which the sixth switch is turned on.
30. The wireless power receiver according to claim 29, wherein the control unit is configured to switch the state between the first state and the second state with the same frequency as that of the electric power signal, or otherwise with a frequency obtained by multiplying or otherwise dividing the frequency of the electric power signal by an odd number.
31. The wireless power receiver according to claim 29, wherein the automatic tuning assist circuit further comprises:
a seventh switch and a second auxiliary coil arranged in series between the first terminal and the second terminal; and
an eighth switch arranged in parallel with the second auxiliary coil,
wherein the control unit is configured to turn on the eighth switch in the first state, and to turn on the seventh switch in the second state.
32. The wireless power receiver according to claim 21, wherein the automatic tuning assist circuit is directly coupled with the reception antenna.
33. The wireless power receiver according to claim 21, wherein the automatic tuning assist circuit is coupled with the reception antenna via a transformer.
34. The wireless power receiver according to claim 24, wherein the first terminal is connected to one end of the reception coil, and the second terminal is connected to the other end of the reception coil.
35. The wireless power receiver according to claim 24, wherein the reception antenna further comprises a resonance capacitor arranged in series with the reception coil,
and wherein the first terminal is connected to one end of the resonance capacitor, and the second terminal is connected to the other end of the resonance capacitor.
36. The wireless power receiver according to claim 24, wherein a tap is provided to the reception coil,
and wherein the first terminal is connected to the tap,
and wherein the second terminal is connected to one end of the reception coil.
37. The wireless power receiver according to claim 24, wherein the reception antenna further comprises two resonance capacitors arranged in series with the reception coil,
and wherein the first terminal is connected to one end of one of the resonance capacitors, and the second terminal is connected to the other end of the aforementioned one resonance capacitor.
38. The wireless power receiver according to claim 24, further comprising a first coil magnetically coupled with the reception coil,
wherein the first terminal is connected to one end of the first coil, and the second terminal is connected to the other end of the first coil.
39. The wireless power receiver according to claim 24, further comprising a transformer having a primary winding arranged in series with the reception antenna,
wherein the first terminal is connected to one end of a secondary winding of the transformer, and the second terminal is connected to the other end of the secondary winding of the transformer.
40. A wireless power supply system comprising:
a wireless power supply transmitter configured to transmit an electric power signal comprising any one from among an electric field, a magnetic field, and an electromagnetic field; and
the wireless power receiver according to claim 21, configured to receive the electric power signal.