Invention Grant
- Patent Title: Detection circuit, physical quantity detection apparatus, angular velocity detection apparatus, integrated circuit device, and electronic instrument
- Patent Title (中): 检测电路，物理量检测装置，角速度检测装置，集成电路装置和电子仪器
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Application No.: US13404475Application Date: 2012-02-24
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Publication No.: US08850887B2Publication Date: 2014-10-07
- Inventor: Yoshinao Yanagisawa , Masahiro Oshio , Takayuki Kikuchi , Toshihiro Nishida , Masayuki Takahashi
- Applicant: Yoshinao Yanagisawa , Masahiro Oshio , Takayuki Kikuchi , Toshihiro Nishida , Masayuki Takahashi
- Applicant Address: JP JP
- Assignee: Seiko Epson Corporation,Seiko NPC Corporation
- Current Assignee: Seiko Epson Corporation,Seiko NPC Corporation
- Current Assignee Address: JP JP
- Agency: Harness, Dickey & Pierce, P.L.C.
- Priority: JP2011-040135 20110225
- Main IPC: G01C19/56
- IPC: G01C19/56 ; H03H9/24 ; G01C19/5776
Abstract:
A detection circuit includes a synchronous detection circuit (synchronous detection section) that synchronously detects a signal that includes a detection signal of a vibrator (an output signal of an amplifier), a switched capacitor filter (SCF) circuit that filters a signal that has been synchronously detected by the synchronous detection circuit (an output signal of a programmable gain amplifier), and an output buffer that buffers and outputs a signal that has been filtered by the SCF circuit, the gain of the SCF circuit being larger than 1.
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