Title:
モータ駆動回路
Document Type and Number:
Japanese Patent JP5778925
Kind Code:
B2
Abstract:
A motor-drive circuit includes: a filter circuit to attenuate a frequency band including a resonance frequency of an actuator in a target-current signal, the target-current signal corresponding to a digital signal indicative of a target value of a driving current; a digital-analog converter to convert an output signal of the filter circuit into an analog signal, to be outputted as a current-control signal; and a driving circuit to supply the driving current to the voice-coil motor in accordance with the current-control signal, the filter circuit including: a digital notch filter; and a digital low-pass filter, wherein either one of the digital notch filter and the digital low-pass filter configured to be inputted with the target-current signal, the other one of the digital notch filter and the digital low-pass filter configured to be inputted with an output signal of the one of the digital notch filter or the digital low-pass filter.
Inventors:
Takeshi Arai
Ryo Suzuki
Ryo Suzuki
Application Number:
JP2010288397A
Publication Date:
September 16, 2015
Filing Date:
December 24, 2010
Export Citation:
Assignee:
Semiconductor Components Industries Limited Liability Company
International Classes:
H03H17/02; H02P7/025; H02P25/06; H03H17/04
Domestic Patent References:
| JP5159492A | ||||
| JP5334818A | ||||
| JP2004085596A | ||||
| JP2000146516A | ||||
| JP2008016173A |
Attorney, Agent or Firm:
Isshiki International Patent Service Corporation