发明名称 |
DRIVER CIRCUIT, PHYSICAL QUANTITY DETECTION APPARATUS, ANGULAR VELOCITY DETECTION APPARATUS, INTEGRATED CIRCUIT DEVICE, AND ELECTRONIC INSTRUMENT |
摘要 |
A driver circuit includes a comparator (drive signal generation section) that generates a drive signal based on a signal obtained by converting an oscillation current of a vibrator that has been input via a first signal line into a voltage using an I/V conversion circuit (current/voltage conversion section), and supplies the drive signal to the vibrator via a second signal line, an oscillation detection circuit (oscillation detection section) that detects whether or not the oscillation current has reached a predetermined value after the vibrator has started to oscillate, a startup oscillation circuit (startup oscillation section) that assists an oscillation operation of the vibrator until the oscillation current reaches the predetermined value, and a switch that separates a capacitor from the second signal line until the oscillation current reaches the predetermined value, and connects the capacitor to the second signal line when the oscillation current has reached the predetermined value.
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申请公布号 |
US2013057354(A1) |
申请公布日期 |
2013.03.07 |
申请号 |
US201213404649 |
申请日期 |
2012.02.24 |
申请人 |
YANAGISAWA YOSHINAO;OSHIO MASAHIRO;KIKUCHI TAKAYUKI;NISHIDA TOSHIHIRO;TAKAHASHI MASAYUKI;SEIKO NPC CORPORATION;SEIKO EPSON CORPORATION |
发明人 |
YANAGISAWA YOSHINAO;OSHIO MASAHIRO;KIKUCHI TAKAYUKI;NISHIDA TOSHIHIRO;TAKAHASHI MASAYUKI |
分类号 |
H03B5/30 |
主分类号 |
H03B5/30 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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