发明授权
- 专利标题： Driver device, physical quantity measuring device, and electronic instrument
- 专利标题（中）： 驱动装置，物理量测量装置和电子仪器
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申请号： US11907483申请日： 2007-10-12
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公开(公告)号： US07812681B2公开(公告)日： 2010-10-12
- 发明人: Masahiro Kanai , Eitaro Otsuka , Naoki Yoshida , Akihiro Fukuzawa
- 申请人： Masahiro Kanai , Eitaro Otsuka , Naoki Yoshida , Akihiro Fukuzawa
- 申请人地址： JP Tokyo
- 专利权人： Seiko) Epson Corporation
- 当前专利权人： Seiko) Epson Corporation
- 当前专利权人地址： JP Tokyo
- 代理机构： Oliff & Berridge PLC
- 优先权： JP2006-282211 20061017; JP2007-239568 20070914
- 主分类号： H03B5/36
- IPC分类号： H03B5/36
摘要：
An oscillation driver circuit includes a gain control amplifier which causes a vibrator to produce driving vibrations by controlling an oscillation amplitude in an oscillation loop, and a comparator which generates a synchronous detection reference signal based on a signal in the oscillation loop. The comparator has an output current limiting function. The oscillation driver circuit causes the vibrator to produce vibrations using an output from the comparator in a state in which the gain in an oscillation loop formed by the vibrator and the comparator is set to be larger than unity, and then causes the vibrator to produce the driving vibrations by controlling an oscillation amplitude in an oscillation loop formed by the vibrator and the gain control amplifier.
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