Title:
DETECTION CIRCUIT AND DETECTION METHOD FOR PIEZORESISTIVE PRESSURE SENSOR, AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/041030
Kind Code:
A1
Abstract:
A detection circuit and detection method for a piezoresistive pressure sensor, and an electronic device, wherein same belong to the technical field of power electronics. A Wheatstone bridge circuit is used for a piezoresistive pressure sensor, and the piezoresistive pressure sensor comprises a first voltage output end (INN) and a second voltage output end (INP), wherein the first voltage output end (INN) is connected to a first voltage input pin of a processing chip, and the second voltage output end (INP) is connected to a second voltage input pin of the processing chip. The detection circuit for a piezoresistive pressure sensor comprises at least one of a first detection unit, a second detection unit, a third detection unit, and a fourth detection unit, wherein each detection unit comprises a current source (IA, IB, IC, ID) and a switch (SA, SB, SC, SD), which is connected in series with the current source (IA, IB, IC, ID), and a control end of the switch (SA, SB, SC, SD) is connected to a processing chip.
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Inventors:
LIN QINGZONG (CN)
Application Number:
PCT/CN2022/119292
Publication Date:
March 23, 2023
Filing Date:
September 16, 2022
Export Citation:
Assignee:
GOERTEK MICROELECTRONICS INC (CN)
International Classes:
G01L25/00; G01L1/20; G01L9/06; G01L27/00; G01R27/02; G01R31/55
Foreign References:
| CN113865757A | 2021-12-31 | |||
| CN110501572A | 2019-11-26 | |||
| CN104796127A | 2015-07-22 | |||
| CN102368086A | 2012-03-07 | |||
| CN104793057A | 2015-07-22 | |||
| CN108872907A | 2018-11-23 | |||
| CN111601429A | 2020-08-28 | |||
| US6304074B1 | 2001-10-16 | |||
| US20060250146A1 | 2006-11-09 |
Attorney, Agent or Firm:
BEYOND TALENT PATENT AGENT FIRM (CN)
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