Title:
物理量検出回路、物理量センサー、電子機器、移動体及び物理量検出回路の動作方法
Document Type and Number:
Japanese Patent JP7234655
Kind Code:
B2
Abstract:
A physical quantity detection circuit includes a passive filter that receives a first analog signal based on an output signal of a physical quantity detection element, an analog/digital conversion circuit, and a precharge circuit that includes an operational amplifier, a first chopper circuit provided between the passive filter and the operational amplifier, and a second chopper circuit provided between the operational amplifier and the input capacitance of the analog/digital conversion circuit and precharges an input capacitance of the analog/digital conversion circuit, the first and the second chopper circuits perform a chopping operation in synchronization with an operation that the analog/digital conversion circuit samples the second analog signal at the input capacitance, based on an output signal of the passive filter.
Inventors:
Hideyuki Yamada
Hideo Haneda
Hideo Haneda
Application Number:
JP2019013422A
Publication Date:
March 08, 2023
Filing Date:
January 29, 2019
Export Citation:
Assignee:
Seiko Epson Corporation
International Classes:
G01C19/5649; H03M1/08; H03M1/12; H03M1/38; H10N30/30; H10N30/853
Domestic Patent References:
| JP2018166272A | ||||
| JP2018009930A | ||||
| JP2016171493A | ||||
| JP2011019156A |
Attorney, Agent or Firm:
Fuse Yukio
Michie Obuchi
川▲崎▼ 通
Mitsufumi Matsumoto
Michie Obuchi
川▲崎▼ 通
Mitsufumi Matsumoto