1. A switching-mode power supply comprising:
a power supply circuit switching input power generated by rectifying AC power with a switching transistor to generate output power having a pre-set voltage level; and
a switching control circuit having a charging and discharging unit generating a charge current to be charged in the switching transistor or a discharge current to be discharged from the switching transistor and a charging and discharging controller determining whether to charge or discharge the switching transistor according to a voltage level of the output power,
wherein an amount of the charge current and an amount of the discharge current are linearly varied according to a voltage level of the input power.
2. The switching-mode power supply of claim 1, wherein each of the amounts of the charge current and the discharge current is increased linearly as the voltage level of the input power is increased.
3. The switching-mode power supply of claim 2, wherein the charging and discharging unit comprises:
a resistor having a pre-set level of resistance and having one end connected to a ground;
an operational amplifier having a non-inverting terminal to which the input power is applied, an inverting terminal connected to the other end of the resistor, and an output terminal; and
a current generation unit mirroring a current flowing to the resistor by the voltage level of the input power and the resistance of the resistor to generate the charge current and the discharge current.
4. The switching-mode power supply of claim 1, wherein the charging and discharging controller comprises:
a charging and discharging switching unit having a charging switch and a discharging switch for transmitting or cutting transmission of the charge current and the discharge current to a gate of the switching transistor; and
a charging and discharging switch controller controlling a switching operation of the charging and discharging switching unit according to a voltage level of the output power.
5. The switching-mode power supply of claim 4, wherein the charging and discharging switch controller controls a switching operation of the charging switch and the discharging switch by setting a duty of the switching transistor according to a comparison result obtained by comparing a voltage level of the output power with a pre-set voltage level of a triangular wave.
6. The switching-mode power supply of claim 5, wherein the charging and discharging switch controller comprises:
a comparator comparing the output power with the voltage level of the triangular wave;
a duty setting unit setting a duty of the switching transistor according to the comparison result from the comparator; and
a switching signal generation unit generating a switching signal for differentially controlling switching operations of the charging switch and the discharging switch according to a duty signal output from the duty setting unit.
7. A switching control circuit of a switching-mode power supply (SMPS) switching input power generated by rectifying AC power with a switching transistor to generate output power having a pre-set voltage level, the switching control circuit comprising:
a charging and discharging unit generating a charge current to be charged in the switching transistor and a discharge current to be discharged from the switching transistor; and
a charging and discharging controller determining whether to charge or discharge the switching transistor according to a voltage level of the output power,
wherein an amount of the charge current and an amount of the discharge current are linearly varied according to a voltage level of the input power.
8. The switching control circuit of claim 7, wherein each of the amounts of the charge current and the discharge current is increased linearly as the voltage level of the input power is increased.
9. The switching control circuit of claim 8, wherein the charging and discharging unit comprises:
a resistor having a pre-set level of resistance and having one end connected to a ground;
an operational amplifier having a non-inverting terminal to which the input power is applied, an inverting terminal connected to the other end of the resistor, and an output terminal; and
a current generation unit mirroring a current flowing to the resistor by the voltage level of the input power and the resistance of the resistor to generate the charge current and the discharge current.
10. The switching control circuit of claim 7, wherein the charging and discharging controller comprises:
a charging and discharging switching unit having a charging switch and a discharging switch for transmitting or cutting transmission of the charge current and the discharge current to a gate of the switching transistor; and
a charging and discharging switch controller controlling a switching operation of the charging and discharging switching unit according to a voltage level of the output power.
11. The switching control circuit of claim 10, wherein the charging and discharging switch controller controls a switching operation of the charging switch and the discharging switch by setting a duty of the switching transistor according to a comparison result obtained by comparing a voltage level of the output power with a pre-set voltage level of a triangular wave.
12. The switching control circuit of claim 11, wherein the charging and discharging switch controller comprises:
a comparator comparing the output power with the voltage level of the triangular wave;
a duty setting unit setting a duty of the switching transistor according to the comparison result from the comparator; and
a switching signal generation unit generating a switching signal for differentially controlling switching operations of the charging switch and the discharging switch according to a duty signal output from the duty setting unit.
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. An apparatus for teaching proper Heimlich or Abdominal Thrust maneuver technique, comprising:
an inflatable bladder;
a tube having first and second ends, said first end connected to said bladder; and
an indicator associated with said second end of said tube;
wherein said indicator is configured to indicate that a minimum threshold compression rate resulting from a force applied on said inflatable bladder was achieved;
wherein said minimum threshold compression rate corresponds to the effectiveness of the applied force in simulating the Heimlich or Abdominal Thrust maneuver technique on said bladder and;
wherein said bladder has means to secure said bladder over an abdominal region of a person or an inanimate body.
2. An apparatus for teaching proper Heimlich or Abdominal Thrust maneuver technique, comprising:
an inflatable bladder;
a tube having first and second ends, said first end connected to said bladder; and
an indicator associated with said second end of said tube;
wherein said indicator is configured to indicate that a minimum threshold compression rate resulting from a force applied to the bladder was achieved;
wherein said minimum threshold compression rate corresponds to the effectiveness of the applied force in simulating the Heimlich or Abdominal Thrust maneuver technique on said bladder; and
wherein said bladder is contained in a wearable garment.
3. An apparatus as recited in claim 2:
wherein said wearable garment comprises front and back portions;
said bladder being located within said front portion of the wearable garment;
wherein said back portion comprises a slap indicator associated with an area of said back portion; and
wherein said slap indicator is adapted to provide feedback regarding a slap administered to said area of said back portion.
4. An apparatus as recited in claim 2:
wherein said tube is configured to be vertically oriented during operation;
wherein the tube comprises a lower end in communication with said bladder and an open upper end;
wherein said indicator comprises a movable body insertible into said tube; and
wherein said indicator is forced out of said upper end of said tube when a force having the minimum threshold compression rate and compression pressure is applied to said bladder.
5. An apparatus as recited in claim 2,
wherein said indicator is physically attached to the apparatus; and
wherein said indicator remains attached to the apparatus while indicating the minimum threshold compression rate and compression pressure.
6. An apparatus as recited in claim 2, wherein said indicator provides visual feedback.
7. An apparatus as recited in claim 2, wherein said indicator provides non-visual feedback.
8. An apparatus for teaching proper Heimlich or Abdominal Thrust maneuver technique, comprising:
a wearable garment or form;
wherein said wearable garment or form comprises:
an air bladder or cavity, and
a tube having first and second ends, said first end connected to and in fluid communication with said air bladder or cavity; and
an indicator associated with said second end of said tube;
wherein said indicator is configured to indicate that a minimum threshold air displacement rate resulting from a force applied on said air bladder or cavity was achieved; and
wherein said-minimum threshold air displacement rate corresponds to the effectiveness of the applied force in simulating the Heimlich or Abdominal Thrust maneuver technique on said bladder or cavity.
9. An apparatus as recited in claim 8, wherein said air bladder or cavity is molded into said wearable garment or form.
10. An apparatus as recited in claim 8, wherein said air bladder or cavity is removable from said wearable garment or form.
11. An apparatus as recited in claim 8, wherein said wearable garment or form mimics at least a portion of a mammal.
12. An apparatus as recited in claim 8, wherein said indicator provides visual feedback.
13. An apparatus as recited in claim 8, wherein said indicator provides non-visual feedback.
14. An apparatus as recited in claim 8:
wherein said wearable garment or form comprises front and back portions;
said bladder or cavity being located within said front portion of the wearable garment;
wherein said back portion comprises a slap indicator associated with an area of said back portion; and
wherein said slap indicator is adapted to provide feedback regarding a slap administered to said area of said back portion.
15. An apparatus as recited in claim 8, wherein said wearable garment or form comprises an air bellows pump assembly.
16. An apparatus as recited in claim 8:
wherein said tube is configured to be vertically oriented during operation;
wherein the tube comprises a lower end in communication with said bladder and an open upper end;
wherein said indicator comprises a movable body insertible into said tube; and
wherein said indicator is forced out of said upper end of said tube when a force having a minimum threshold compression rate and compression pressure is applied to said bladder.
17. An apparatus for teaching proper Heimlich or Abdominal Thrust maneuver technique, comprising:
a compressible container;
an outlet coupled to said compressible container; and
an indicator coupled to or inserted in said outlet;
wherein said indicator is configured to indicate that a minimum threshold compression rate resulting from a force applied on said compressible container was achieved;
wherein said compressible container is included in a wearable garment or form; and
wherein said minimum threshold compression rate corresponds to the effectiveness of the applied force in simulating Heimlich or Abdominal Thrust maneuver technique on said compressible container.
18. An apparatus as recited in claim 17, wherein said wearable garment or form comprises an air bellows pump assembly.
19. An apparatus as recited in claim 17:
wherein said outlet is configured to be vertically oriented during operation;
wherein the outlet comprises a lower end in communication with said compressible container and an open upper end;
wherein said indicator comprises a movable body insertible into said outlet; and
wherein said indicator is forced out of said upper end of said outlet when a force having the minimum threshold compression rate and compression pressure is applied to said compressible container.