Invention Grant
- Patent Title: Driver device, physical quantity measuring device, and electronic instrument
- Patent Title (中): 驱动装置，物理量测量装置和电子仪器
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Application No.: US11979442Application Date: 2007-11-02
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Publication No.: US07895894B2Publication Date: 2011-03-01
- Inventor: Masahiro Kanai , Naoki Yoshida , Eitaro Otsuka
- Applicant: Masahiro Kanai , Naoki Yoshida , Eitaro Otsuka
- Applicant Address: JP Tokyo
- Assignee: Seiko Epson Corporation
- Current Assignee: Seiko Epson Corporation
- Current Assignee Address: JP Tokyo
- Agency: Oliff & Berridge PLC
- Priority: JP2006-300080 20061106; JP2007-282053 20071030
- Main IPC: H03B5/36
- IPC: H03B5/36 ; H03B5/32 ; G01N27/00 ; H03L5/00
Abstract:
A driver device includes a gain control amplifier that causes a vibrator to produce driving vibrations by controlling an oscillation amplitude in an oscillation loop, a signal generation circuit that generates a signal having a given frequency, and a modulation circuit that modulates the frequency of the signal generated by the signal generation circuit to a resonance frequency of the vibrator. The driver device causes the vibrator to produce the driving vibrations using the signal modulated by the modulation circuit, and then causes the vibrator to produce the driving vibrations by controlling the oscillation amplitude in the oscillation loop formed by the vibrator and the gain control amplifier.
Public/Granted literature
- US20080105054A1 Driver device, physical quantity measuring device, and electronic instrument Public/Granted day:2008-05-08
Information query
