US 12,143,083 B2
Continuously variable active reactance systems and methods
Robert A. Moffatt, Palo Alto, CA (US)
Assigned to Etherdyne Technologies, Inc., Santa Clara, CA (US)
Appl. No. 18/043,111
Filed by Etherdyne Technologies, Inc., Palo Alto, CA (US)
PCT Filed Aug. 26, 2021, PCT No. PCT/US2021/047734
§ 371(c)(1), (2) Date Feb. 27, 2023,
PCT Pub. No. WO2022/047018, PCT Pub. Date Mar. 3, 2022.
Claims priority of provisional application 63/071,048, filed on Aug. 27, 2020.
Prior Publication US 2023/0327650 A1, Oct. 12, 2023
Int. Cl. H03H 11/02 (2006.01); H02J 50/12 (2016.01)
CPC H03H 11/02 (2013.01) [H02J 50/12 (2016.02)] 23 Claims
OG exemplary drawing
 
1. A system, comprising:
an active variable reactance circuit, comprising:
an electrically-controllable switching element;
a passive reactive component connected to at least one terminal of the electrically-controllable switching element;
a resonator connected to the at least one terminal of the electrically-controllable switching element;
a radiofrequency (RF) pickup component configured to generate a pickup voltage proportional to an RF current or voltage passing through or across the resonator;
a switch controller sub-circuit that receives the pickup voltage and a control voltage, and generates a switch control signal having a duty cycle based on the control voltage and a phase based on the pickup voltage that switches the electrically-controllable switching element at a frequency of the RF current or voltage passing through or across the resonator,
wherein the switch controller sub-circuit comprises a comparator and an op-amp feedback loop, wherein the comparator receives the pickup voltage as a first input and a comparison voltage as a second input, the comparison voltage being an output of the op-amp feedback loop,
wherein the op-amp feedback loop receives the switch control signal as a first input and the control voltage as a second input, and outputs the comparison voltage to the comparator.