发明名称 |
SIGNAL PROCESSING CIRCUIT, PHYSICAL QUANTITY DETECTION APPARATUS, ANGULAR VELOCITY DETECTION APPARATUS, INTEGRATED CIRCUIT DEVICE, AND ELECTRONIC INSTRUMENT |
摘要 |
A signal processing circuit includes an I/V conversion circuit (current/voltage conversion section) that converts an oscillation current of a vibrator into a voltage, an RC filter (phase shift section) that shifts a phase of the output signal of the I/V conversion circuit, a full-wave rectifier (part of a drive amplitude control section) that binarizes a signal that has been shifted in phase to generate a switch control signal, a comparator (reference signal generation section) that generates a reference signal for synchronous detection based on the output signal of the I/V conversion circuit, and an EXOR circuit (clock signal generation section) that generates a clock signal for a switched capacitor filter (SCF) that has a frequency twice a frequency of a drive signal based on a phase difference between the reference signal and the switch control signal.
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申请公布号 |
US2013055815(A1) |
申请公布日期 |
2013.03.07 |
申请号 |
US201213404573 |
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 |
G01H13/00 |
主分类号 |
G01H13/00 |
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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