1. An integrated circuit comprising:
a substrate;
a first integrated circuit die coupled to the substrate, the first integrated circuit die including:
a first circuit;
a first intra-chip clock interface coupled to the substrate that transmits a first clock signal;
a second integrated circuit die coupled to the substrate, the second integrated circuit die including:
a second circuit that operates based on the first clock signal;
a second intra-chip clock interface coupled to the substrate that recovers the first clock signal;
wherein the substrate includes wave guide for coupling the first clock signal from the first intra-chip clock interface to the second intra-chip clock interface as a radio frequency signal.
2. The integrated circuit of claim 1 wherein the first clock signal is at a millimeter wave frequency.
3. The integrated circuit of claim 1 wherein the first circuit operates based on the first clock signal.
4. The integrated circuit of claim 1 wherein the first intra-chip clock interface further transmits a second clock signal;
wherein the second intra-chip clock interface recovers the second clock signal; and
wherein the second circuit operates based on the second clock signal.
5. The integrated circuit of claim 4 wherein the first circuit operates based on the second clock signal.
6. The integrated circuit of claim 1 wherein the second intra-chip clock interface includes a clock generation module that generates a second clock signal based on the first clock signal.
7. The integrated circuit of claim 1 wherein the second intra-chip clock interface includes a clock generation module that generates a plurality of second clock signals based on the first clock signal.
8. An integrated circuit comprising:
a substrate;
a first integrated circuit die coupled to the substrate, the first integrated circuit die including:
a first circuit;
a first intra-chip clock interface coupled to the substrate that transmits a first clock signal;
a second integrated circuit die coupled to the substrate, the second integrated circuit die including:
a second circuit that operates based on the first clock signal;
a second intra-chip clock interface coupled to the substrate that recovers the first clock signal;
wherein the substrate includes a magnetic path for inductively coupling the first clock signal from the first intra-chip clock interface to the second intra-chip clock interface.
9. The integrated circuit of claim 8 wherein the first clock signal is at a millimeter wave frequency.
10. The integrated circuit of claim 8 wherein the first circuit operates based on the first clock signal.
11. The integrated circuit of claim 8 wherein the first intra-chip clock interface further transmits a second clock signal;
wherein the second intra-chip clock interface recovers the second clock signal; and
wherein the second circuit operates based on the second clock signal.
12. The integrated circuit of claim 11 wherein the first circuit operates based on the second clock signal.
13. The integrated circuit of claim 8 wherein the second intra-chip clock interface includes a clock generation module that generates a second clock signal based on the first clock signal.
14. The integrated circuit of claim 8 wherein the second intra-chip clock interface includes a clock generation module that generates a plurality of second clock signals based on the first clock signal.
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 method of processing a plurality of image chargecurrent signals representative of trapped ions undergoing oscillatory motion, the method including:
producing a linear combination of the plurality of image chargecurrent signals using a plurality of predetermined coefficients, the predetermined coefficients having been selected so as to suppress at least one harmonic component of the image chargecurrent signals within the linear combination of the plurality of image chargecurrent signals.
2. A method according to claim 1, wherein the method includes providing the linear combination of the plurality of image chargecurrent signals in the frequency domain so as to provide information regarding the masscharge ratio distribution of the trapped ions.
3. A method according to claim 2, wherein the method includes providing the linear combination of the plurality of image chargecurrent signals in the frequency domain using a discrete Fourier transform.
4. A method according to claim 2, wherein the plurality of image chargecurrent signals are initially obtained in the time domain and providing the linear combination of the plurality of image chargecurrent signals in the frequency domain is achieved by either:
(a) producing the linear combination of the plurality of image chargecurrent signals in the time domain, then converting the linear combination of the plurality of image chargecurrent signals from the time domain into the frequency domain; or
(b) converting each of the plurality of image chargecurrent signals from the time domain into the frequency domain, then producing the linear combination of the plurality of image chargecurrent signals in the frequency domain.
5. A method according to claim 4, wherein the plurality of image chargecurrent signals are initially obtained in the time domain and providing the linear combination of the plurality of image chargecurrent signals in the frequency domain is achieved by producing the linear combination of the plurality of image chargecurrent signals in the time domain, then converting the linear combination of the plurality of image chargecurrent signals from the time domain into the frequency domain.
6. A method according to claim 1, wherein the predetermined coefficients are selected to suppress at least one harmonic component of the image chargecurrent signals relative to another harmonic component which has been selected for use in obtaining information regarding the masscharge ratio distribution of trapped ions.
7. A method according to claim 1, wherein the predetermined coefficients are selected so as to substantially eliminate at least one harmonic component of the plurality of image chargecurrent signals within the linear combination of the plurality of image chargecurrent signals.
8. A method according to claim 1, wherein the predetermined coefficients are selected so as to suppress or substantially eliminate n\u22121 of the first n harmonic components, where n is two or more.
9. A method according to claim 1, wherein the predetermined coefficients are selected so as to suppress or substantially eliminate m of the harmonic components having an order between n and n+m, where n is a positive integer and m is two or more.
10. A method according to claim 1, wherein the predetermined coefficients are complex.
11. A method according to claim 1, wherein the method includes displaying the linear combination of the plurality of image chargecurrent signals in the frequency domain.
12. A method according to claim 1, wherein the method includes obtaining a plurality of image chargecurrent signals before processing the plurality of image chargecurrent signals, wherein obtaining the plurality of image chargecurrent signals includes:
producing ions;
trapping the ions such that the trapped ions undergo oscillatory motion; and
obtaining a plurality of image chargecurrent signals representative of the trapped ions undergoing oscillatory motion using at least one image chargecurrent detector.
13. A method according to claim 12, wherein the plurality of image chargecurrent signals are obtained using a plurality of image chargecurrent detectors, with each image chargecurrent signal being obtained using a respective image chargecurrent detector.
14. A method according to claim 12, wherein two or more of the plurality of image chargecurrent signals are obtained using the same image chargecurrent detector.
15. A method according to claim 14, wherein two or more of the plurality of image chargecurrent signals are obtained using the same image chargecurrent detector, with at least one of the two or more image chargecurrent signals being obtained by applying at least one processing algorithm to an image chargecurrent signal produced by the image chargecurrent detector.
16. A method according to claim 15, wherein the or each processing algorithm is configured to modify an image chargecurrent signal in the frequency domain with phase information obtained from the image chargecurrent signal.
17. A method of selecting predetermined coefficients for use in a method of processing a plurality of image chargecurrent signals, the method including:
obtaining a plurality of image chargecurrent signals;
setting up equations aimed at suppressing or eliminating at least one harmonic component of the image chargecurrent signals; and
selecting the predetermined coefficients by solving the equations.
18. A method according to claim 17, wherein the method includes:
producing ions, wherein the produced ions include ions having a reference masscharge ratio;
trapping the ions such that the trapped ions undergo oscillatory motion;
obtaining a plurality of image chargecurrent signals representative of the trapped ions undergoing oscillatory motion, wherein the plurality of image chargecurrent signals include harmonic components caused by ions having the reference masscharge ratio;
providing the plurality of image chargecurrent signals in the frequency domain;
setting up linear equations aimed at suppressing or eliminating at least one of the plurality of harmonic components of the image chargecurrent signals within a linear combination of the plurality of image chargecurrent signals, wherein setting up the linear equations includes producing a linear combination of the plurality of image chargecurrent signals as sampled at a plurality of frequencies using a plurality of undetermined coefficients, with each of the plurality of frequencies corresponding to a respective one of a plurality of harmonic components caused by ions having the reference masscharge ratio; and
selecting the predetermined coefficients by solving the linear equations.
19. A method according to claim 17, wherein setting up equations aimed at suppressing or eliminating at least one harmonic component of the image chargecurrent signals includes setting up linear equations, wherein at least one linear combination of the plurality of image chargecurrent signals as sampled at one of a plurality of harmonic frequencies using a plurality of undetermined coefficients is set equal to zero or to a value that is smaller than another linear combination of the plurality of image chargecurrent signals as sampled at another one of the plurality of harmonic frequencies using said undetermined coefficients.
20. A method according to claim 17, wherein the method additionally includes:
producing a linear combination of a plurality of image chargecurrent signals representative of trapped ions undergoing oscillatory motion using the selected predetermined coefficients.
21. A method according to claim 20, wherein:
the method of selecting predetermined coefficients includes providing the plurality of image chargecurrent signals in the frequency domain using a first discrete Fourier transform; and
the method additionally includes providing the linear combination in the frequency domain using a second discrete Fourier transform;
wherein the first and second discrete Fourier transforms use the same frequency range and frequency step.
22. A mass spectrometry apparatus having a processing apparatus configured to perform a method of processing a plurality of image chargecurrent signals representative of trapped ions undergoing oscillatory motion, the method including:
producing a linear combination of the plurality of image chargecurrent signals using a plurality of predetermined coefficients, the predetermined coefficients having been selected so as to suppress at least one harmonic component of the image chargecurrent signals within the linear combination of the plurality of image chargecurrent signals.
23. A mass spectrometry apparatus according to claim 22, wherein the mass spectrometry apparatus has a display configured to display the linear combination of the plurality of image chargecurrent signals in the frequency domain.
24. A mass spectrometry apparatus according to claim 22, wherein the mass spectrometry apparatus has:
an ion source configured to produce ions;
a mass analyser configured to trap the ions such that the trapped ions undergo oscillatory motion in the mass analyser;
at least one image chargecurrent detector for use in obtaining a plurality of image chargecurrent signals representative of trapped ions undergoing oscillatory motion in the mass analyser; and
a processing apparatus configured to perform a method of processing a plurality of image chargecurrent signals obtained using the at least one image chargecurrent detector, wherein the method includes producing a linear combination of the plurality of image chargecurrent signals using a plurality of predetermined coefficients, the predetermined coefficients having been selected so as to suppress at least one harmonic component of the image chargecurrent signals within the linear combination of the plurality of image chargecurrent signals.
25. A mass spectrometry apparatus according to claim 24, wherein the mass analyser is an electrostatic ion trap configured to produce an electrostatic field to trap ions produced by the ion source such that the trapped ions undergo oscillatory motion in the mass analyser.
26. A mass spectrometer according to claim 25, wherein the electrostatic ion trap is a linear or planar electrostatic ion trap or has the form of an Orbitrap configured to use a hyper-logarithmic electric field for ion trapping.
27. A mass spectrometer according to claim 25, wherein the electrostatic ion trap has a plurality of image chargecurrent detectors configured to produce an image chargecurrent signal representative of trapped ions undergoing oscillatory motion in the mass analyser.
28. A mass spectrometer according to claim 25, wherein the electrostatic ion trap has multiple field forming electrodes at least some of which are also used as image chargecurrent detectors.
29. A computer-readable medium having computer-executable instructions configured to cause a mass spectrometry apparatus to perform a method of processing a plurality of image chargecurrent signals representative of trapped ions undergoing oscillatory motion, the method including:
producing a linear combination of the plurality of image chargecurrent signals using a plurality of predetermined coefficients, the predetermined coefficients having been selected so as to suppress at least one harmonic component of the image chargecurrent signals within the linear combination of the plurality of image chargecurrent signals.