System and method for controlling an electromagnetic field generator
First Claim
1. A system for controlling an electromagnetic field generator, comprising:
- a plurality of transistors arranged in an H-bridge configuration, the H-bridge having first and second output terminals, first and second switching inputs, and a power input;
a control transistor coupling the power input to a power supply; and
a diode having a cathode coupled to the power input and an anode coupled to ground,wherein the first and second output terminals are coupled to the electromagnetic field generator and the first and second switching inputs receive switching signals based on an output of the electromagnetic field generator.
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Accused Products
Abstract
A system for driving an electromagnetic field generator. In one aspect, the system may include a plurality of transistors arranged in an H-bridge configuration, the H-bridge having first and second output terminals, first and second switching inputs, and a power input. The system may further include a control transistor coupling the power input to a power supply, and a diode having a cathode coupled to the power input and an anode coupled to ground. The first and second output terminals may be coupled to the electromagnetic field generator and the first and second switching inputs may receive switching signals based on an output of the electromagnetic field generator.
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Citations
20 Claims
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1. A system for controlling an electromagnetic field generator, comprising:
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a plurality of transistors arranged in an H-bridge configuration, the H-bridge having first and second output terminals, first and second switching inputs, and a power input; a control transistor coupling the power input to a power supply; and a diode having a cathode coupled to the power input and an anode coupled to ground, wherein the first and second output terminals are coupled to the electromagnetic field generator and the first and second switching inputs receive switching signals based on an output of the electromagnetic field generator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for controlling a resonant device, comprising:
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a control transistor having a collector coupled to a first terminal of a power supply and an emitter coupled to a first terminal of the resonant device; a first diode having a cathode coupled to the first terminal of the power supply and an anode coupled to the first terminal of the resonant device; a second diode having a cathode coupled to the first terminal of the resonant device and an anode coupled to a second terminal of the power supply; and a switching transistor having a source coupled to a second terminal of the resonant device, a drain coupled to the second terminal of the power supply and a gate receiving a switching signal. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method for controlling an electromagnetic field generator, comprising:
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a. generating a DC voltage and storing the DC voltage in a capacitor; b. applying the DC voltage to the power input of a plurality of transistors arranged in an H-bridge; c. controlling the application of the DC voltage to the H-bridge in step b based on a pulse width modulated signal; d. controlling a voltage applied from the outputs of the H-bridge to the electromagnetic field generator based on a switching signal; e. generating the switching signal using a feedback signal from the electromagnetic field generator. - View Dependent Claims (17, 18, 19, 20)
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Specification