Driving circuit, system and method for resonant device
AssigneeRealtek Semiconductor Corp.
InventorJen-Chieh Tan
Life of this patent
Estimating the term…
Abstract
A driving circuit for driving a resonant device includes a voltage sensor, a signal controller, a signal generator and a driver. The voltage sensor, coupled to the resonant device, is configured to detect a back electromotive force (EMF) of the resonant device. The signal controller, coupled to the voltage sensor, is configured to control the length of an operation period of the driving circuit according to the back EMF. The signal generator, coupled to the signal controller, is configured to generate a driving signal corresponding to the length of the operation period. The driver, coupled to the signal generator, is configured to output the driving signal to the resonant device.
Claims20
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.
A driving system, comprising:
- a resonant device;
- and
- a driving circuit, configured to drive the resonant device, the driving circuit 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.
A driving method for a driving circuit to drive a resonant device, comprising:
- detecting a back electromotive force (EMF) of the resonant device;
- controlling the length of an operation period of the driving circuit according to the back EMF;
- generating a driving signal corresponding to the length of the operation period;
- and
- outputting the driving signal to the resonant device.
Dependencies are inferred from the claim text.