Resonant tuning through rectifier time shifting
First Claim
Patent Images
1. A circuit comprising:
- a wireless power signal input to provide a wireless power input signal;
a switch network coupled to the wireless power signal input, the switch network comprising switches arranged to rectify the wireless power input signal to provide a wireless power output signal;
control circuitry in communication with the switch network, the control circuitry configured to;
respond to a current wireless power transfer operating goal by;
performing a sweep over a plurality of switching delays for the switch network;
determining a first switching delay from the plurality of switching delays for meeting the current wireless power transfer operating goal, the first switching delay providing an impedance to introduce to the switch network;
purposefully introduce the impedance to the switch network using the wireless power input signal; and
cause the switches to rectify the wireless power input signal to produce the wireless power output signal.
6 Assignments
0 Petitions
Accused Products
Abstract
A device includes support for wireless power transfer. The device may control the timing of switching devices in a rectifier circuit and implement resonant tuning techniques that facilitate the wireless power transfer, e.g., by purposefully introducing a real or complex impedance chosen to meet a current operating goal. The device may use the techniques in connection with wireless charging or wireless provision of power to run the device, as examples.
-
Citations
20 Claims
-
1. A circuit comprising:
-
a wireless power signal input to provide a wireless power input signal; a switch network coupled to the wireless power signal input, the switch network comprising switches arranged to rectify the wireless power input signal to provide a wireless power output signal; control circuitry in communication with the switch network, the control circuitry configured to; respond to a current wireless power transfer operating goal by; performing a sweep over a plurality of switching delays for the switch network; determining a first switching delay from the plurality of switching delays for meeting the current wireless power transfer operating goal, the first switching delay providing an impedance to introduce to the switch network; purposefully introduce the impedance to the switch network using the wireless power input signal; and cause the switches to rectify the wireless power input signal to produce the wireless power output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A method comprising:
-
determining a current wireless power transfer operating goal; receiving a wireless power input signal; rectifying the wireless power input signal with a switch network to provide a wireless power output signal; providing the wireless power input signal to control circuitry in communication with the switch network; and controlling the switch network in response to the current wireless power transfer operating goal by; performing a sweep over a plurality of switching delays for the switch network; determining a first switching delay from the plurality of switching delays for meeting the current wireless power transfer operating goal, the first switching delay providing an impedance to introduce to the switch network responsive to the operating goal; introducing the impedance to the switch network using the wireless power input signal; generating a comparison voltage responsive to the first switching delay; and changing switch timing of the switch network responsive to a comparison of the wireless power input signal and the comparison voltage. - View Dependent Claims (14, 15, 16)
-
-
17. A circuit comprising:
-
a wireless power signal input to provide a wireless power input signal; switching transistors coupled to the wireless power signal input and arranged as a full wave rectifier operable to rectify the wireless power input signal into a wireless power output signal; a power output coupled to the full wave rectifier and configured to provide the wireless power output signal; a comparator network comprising individual comparators operable to selectively turn ON and turn OFF the switching transistors; control circuitry configured to perform a sweep over a plurality of switching delays for the switch network in response to a wireless power transfer operating goal, determine a first switching delay from the plurality of switching delays for meeting the current wireless power transfer operating goal, the first switching delay providing an impedance to introduce to the full wave rectifier using the wireless power input signal; and variable voltage sources configured to provide the individual comparators with tunable voltages responsive to the wireless power transfer operating goal, the individual comparators responsive to the tunable voltages and the wireless power input signal to modify switching timing of the switching transistors. - View Dependent Claims (18, 19, 20)
-
Specification