US 12,445,071 B2
Driving circuit, system and method for resonant device
Jen-Chieh Tan, HsinChu (TW)
Assigned to Realtek Semiconductor Corp., HsinChu (TW)
Filed by Realtek Semiconductor Corp., HsinChu (TW)
Filed on Dec. 8, 2023, as Appl. No. 18/533,242.
Claims priority of application No. 112100405 (TW), filed on Jan. 5, 2023.
Prior Publication US 2024/0235439 A1, Jul. 11, 2024
Int. Cl. H02K 33/04 (2006.01); G06F 3/01 (2006.01); H02P 6/15 (2016.01); H02P 6/182 (2016.01)
CPC H02P 6/182 (2013.01) [G06F 3/016 (2013.01); H02P 6/157 (2016.02)] 20 Claims
OG exemplary drawing
 
1. A driving circuit for driving a resonant device, comprising:
a voltage sensor, coupled to the resonant device, configured to detect a back electromotive force (EMF) of the resonant device;
a signal controller, coupled to the voltage sensor, configured to control the length of an operation period of the driving circuit according to the back EMF;
a signal generator, coupled to the signal controller, configured to generate a driving signal corresponding to the length of the operation period; and
a driver, coupled to the signal generator, configured to output the driving signal to the resonant device.