Method and system for a complementary metal oxide semiconductor wireless power receiver
View Patent ↗Methods and systems for a complementary metal oxide semiconductor wireless power receiver may include a receiver chip with an inductor, a configurable capacitance, and a rectifier. The method may include receiving an RF signal utilizing the inductor, extracting a clock signal from the received RF signal, generating a DC voltage utilizing a rectifier circuit, sampling the DC voltage, and adjusting the configurable capacitance based on the sampled DC voltage. The rectifier circuit may include CMOS transistors and T-gate switches for coupling to the inductor. The T-gate switches may be controlled by the generated DC voltage. A signed based gradient-descent algorithm may be utilized to maximize the DC voltage. The DC voltage may be sampled utilizing a comparator powered by the DC voltage, which may adaptively configure the capacitance. The inductor may be shielded utilizing a floating shield. The DC voltage may be increased utilizing a voltage-boosting rectifier.
1. A method for wireless power transfer, the method comprising:
in a chip with a configurable capacitance and a rectifier:
receiving a wireless signal;
generating, utilizing the rectifier, a DC voltage based on the received wireless signal;
sampling the DC voltage; and
adjusting the configurable capacitance based on the sampled DC voltage.
2. The method according to claim 1 , wherein the rectifier comprises complementary metal oxide semiconductor transistors and T-gate switches.
3. The method according to claim 2 , wherein the T-gate switches are controlled by the generated DC voltage.
4. The method according to claim 1 , comprising utilizing a signed based gradient descent algorithm to maximize the generated DC voltage.
5. The method according to claim 1 , comprising sampling the DC voltage utilizing a comparator powered by the generated DC voltage.
6. The method according to claim 1 , comprising adaptively configuring the configurable capacitance based on the sampled DC voltage.
7. The method according to claim 1 , wherein an inductor for receiving the wireless signal is shielded utilizing a floating shield and/or tapering.
8. The method according to claim 7 , wherein the inductor comprises a plurality of parallel conductive metal strips.
9. The method according to claim 1 , wherein the chip is a CMOS chip.
10. The method according to claim 1 , comprising increasing the generated DC voltage utilizing a voltage-boosting rectifier.
11. A system for wireless power transfer, the system comprising:
a chip with a configurable capacitance and a rectifier, said receiver chip being operable to:
receive a wireless signal;
generate, utilizing the rectifier, a DC voltage based on the received wireless signal;
sample the DC voltage; and
adjust the configurable capacitance based on the sampled DC voltage.
12. The system according to claim 11 , wherein the rectifier comprises complementary metal oxide semiconductor transistors and T-gate switches.
13. The system according to claim 12 , wherein the T-gate switches are controlled by the generated DC voltage.
14. The system according to claim 11 , wherein the chip is operable to utilize a signed based gradient-descent algorithm to maximize the generated DC voltage.
15. The system according to claim 11 , wherein the chip is operable to sample the DC voltage utilizing a comparator powered by the generated DC voltage.
16. The system according to claim 11 , wherein the chip is operable to adaptively configure the configurable capacitance based on the sampled DC voltage.
17. The system according to claim 11 , wherein an inductor for receiving the wireless signal is shielded utilizing a floating shield and/or tapering.
18. The system according to claim 17 , wherein the inductor comprises a plurality of parallel conductive metal strips.
19. The system according to claim 11 , wherein the chip is operable to increase the generated DC voltage utilizing a voltage-boosting rectifier.
20. A system for wireless power transfer, the system comprising:
a chip with a configurable capacitance and a rectifier, said chip being operable to:
receive a wireless signal through a biological media;
generate, utilizing the rectifier, a DC voltage based on the received wireless signal;
sample the DC voltage utilizing a comparator with an output coupled to an adaptation circuit; and
adjust the configurable capacitance utilizing the adaptation circuit.