REGULATED LOAD MODULATION CIRCUIT AND METHOD FOR PRODUCING REGULATED LOAD MODULATION SIGNALING
First Claim
1. A load modulation circuit, comprising:
- a resonator circuit configured to resonate based on a received charging power and produce a resonance output signal based thereon;
a rectifier circuit configured to receive the resonance output signal and convert the resonance output signal to a rectified voltage signal;
a sensor circuit configured to sense the rectified voltage signal and generate a control signal based on the rectified voltage signal and a target power range associated with a change in conducting power of the load modulation circuit during a load modulation; and
a controllable current source circuit configured to generate a controlled current based on the control signal, wherein the controlled current is to modulate a load of the load modulation circuit while concurrently maintaining a change in total conducting power at an output of the rectified circuit within the target power range.
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Accused Products
Abstract
A load modulation circuit includes a resonator circuit configured to resonate based on a received charging power and produce a resonance output signal based thereon, and a rectifier circuit configured to receive the resonance output signal and convert the resonance output signal to a rectified voltage signal. The load modulation circuit further includes a sensor circuit configured to sense the rectified voltage signal and generate a control signal based on the rectified voltage signal and a target power range associated with a change in conducting power of the load modulation circuit during a load modulation. Lastly, the load modulation circuit includes a controllable current source circuit configured to generate a controlled current based on the control signal, wherein the controlled current modulates a load of the load modulation circuit while concurrently maintaining a change in total conducting power at an output of the rectified circuit within the target power range.
13 Citations
21 Claims
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1. A load modulation circuit, comprising:
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a resonator circuit configured to resonate based on a received charging power and produce a resonance output signal based thereon; a rectifier circuit configured to receive the resonance output signal and convert the resonance output signal to a rectified voltage signal; a sensor circuit configured to sense the rectified voltage signal and generate a control signal based on the rectified voltage signal and a target power range associated with a change in conducting power of the load modulation circuit during a load modulation; and a controllable current source circuit configured to generate a controlled current based on the control signal, wherein the controlled current is to modulate a load of the load modulation circuit while concurrently maintaining a change in total conducting power at an output of the rectified circuit within the target power range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for producing regulated load modulation signaling, comprising:
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sensing a received voltage at a load associated with a load modulation; determining a modulation current to satisfy a target power range based on the sensed received voltage; determining a duty cycle of a load modulation switch based on the determined modulation current; and driving the load modulation switch with the determined duty cycle. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A load modulation circuit, comprising:
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a sensor circuit configured to sense a load voltage associated with the load modulation circuit, wherein the sensor circuit is further configured to generate a control signal based on the sensed load voltage and a target power range associated with a change in conducting power of the load modulation circuit during a load modulation; and a controllable current source circuit configured to generate a controlled current based on the control signal, wherein the controlled current modulates a load of the load modulation circuit while concurrently maintaining a change in total conducting power of the load modulation circuit within the target power range. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification