SINGLE SWITCH MODULATION CIRCUIT AND WIRELESS CHARGING RECEIVER
A wireless charging receiver that provides power delivered from a transmitter over an wireless path. The receiver includes a rectifier circuit, an LC circuit coupled to the rectifier circuit and the transmitter, a single switch modulation circuit coupled to the rectifier circuit and the LC circuit, an output circuit coupled to the rectifier circuit. The receiver further comprises an in-band controller coupled to the LC circuit and the single switch modulation circuit operational to detect a reflected parameter from incident RF power. A resistance value of the single switch modulation circuit can be set in response to a detected parametric value of the LC circuit. The resistance value can be set to cause the rectifier circuit to generate one of a stable RDCV value, an increased RDCV value, and a decreased RDCV value with respect to a normal PDC value in response to the received RF power.
1 - 20 . (canceled)
21 . A system comprising:
a rectifier circuit;
a first circuit having a resonant frequency coupled to the rectifier circuit and the transmitter;
a modulation circuit coupled to the rectifier circuit and the first circuit; and
an output circuit coupled to the rectifier circuit;
an in-band controller coupled to the first circuit and the modulation circuit operational to detect a reflected parameter from an incident RF signal; and
wherein an impedance value of the modulation circuit is set in response to a detected parametric value of the first circuit, and the modulation circuit comprises a transistor.
22 . The system of claim 21 wherein the impedance value causes the rectifier circuit to generate a stable voltage value with respect to a normal voltage value in response to the received RF signal.
23 . The system of claim 21 wherein the impedance value is set to cause the rectifier circuit to generate a stable voltage value with respect to a normal voltage value in response to the received RF signal.
24 . The system of claim 21 wherein the impedance value causes the rectifier circuit to generate an increased voltage value with respect to a normal voltage value in response to the received RF signal.
25 . The system of claim 21 wherein the impedance value is set to cause the rectifier circuit to generate an increased voltage value with respect to a normal voltage value in response to the received RF signal.
26 . The system of claim 21 wherein the impedance value is set to cause the rectifier circuit to generate a decreased voltage value with respect to a normal voltage value in response to the received RF signal.
27 . The system of claim 21 wherein the output circuit is one of a switching voltage regulator, a linear voltage regulator, or a battery charger.
28 . A system comprising:
a rectifier circuit;
a first circuit having a resonant response characteristic coupled to the rectifier circuit and the transmitter; and
a modulation circuit coupled to the rectifier circuit and the first circuit;
a controller coupled to the first circuit and the modulation circuit configured to detect a reflected parameter from an incident RF signal;
wherein an impedance value of the modulation circuit is set in response to a detected parametric value of the first circuit and the modulation circuit comprises a transistor.
29 . The system of claim 28 wherein the impedance value causes the rectifier circuit to generate a stable voltage value with respect to a normal voltage value in response to the received RF signal.
30 . The system of claim 28 wherein the impedance value is set to cause the rectifier circuit to generate a stable voltage value with respect to a normal voltage value in response to the received RF signal.
31 . The system of claim 28 wherein the impedance value causes the rectifier circuit to generate an increased voltage value with respect to a normal voltage value in response to the received RF signal.
32 . The system of claim 28 wherein the impedance value is set to cause the rectifier circuit to generate an increased voltage value with respect to a normal voltage value in response to the received RF signal.
33 . The system of claim 28 wherein the impedance value is set to cause the rectifier circuit to generate a decreased voltage value with respect to a normal voltage value in response to the received RF signal.
34 . The system of claim 28 further comprising:
an output circuit coupled to the rectifier circuit;
wherein the output circuit is a power control circuit.
35 . A system comprising:
a rectifier circuit;
a first circuit having at least one resonance parameter coupled to the rectifier circuit and the transmitter;
a modulation circuit coupled to the rectifier circuit and the first circuit;
an output circuit coupled to the rectifier circuit;
a controller coupled to the first circuit and the modulation circuit operational to detect a parameter from an RF signal; and
wherein an on-state impedance of the single switch modulation circuit is set in response to a detected parametric value of the first circuit and the modulation circuit comprises a transistor.
36 . The system of claim 35 wherein the on-state impedance causes the rectifier circuit to generate a stable voltage value with respect to a normal voltage value in response to the RF signal.
37 . The system of claim 35 wherein the on-state impedance causes the rectifier circuit to generate an increased voltage value with respect to a normal voltage value in response to the RF signal.
38 . The system of claim 35 wherein the on-state impedance causes the rectifier circuit to generate a decreased voltage value with respect to a normal voltage value in response to the RF signal.
39 . The system of claim 35 wherein the output circuit is one of a switching voltage regulator, a linear voltage regulator, or a battery charger.
40 . The system of claim 35 wherein the modulation circuit comprises a single switch circuit.