Invention Grant
US09462395B2 Biasing circuit for a MEMS acoustic transducer with reduced start-up time
有权
具有减少启动时间的MEMS声学换能器的偏置电路
- Patent Title: Biasing circuit for a MEMS acoustic transducer with reduced start-up time
- Patent Title (中): 具有减少启动时间的MEMS声学换能器的偏置电路
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Application No.: US14746252Application Date: 2015-06-22
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Publication No.: US09462395B2Publication Date: 2016-10-04
- Inventor: Germano Nicollini , Andrea Barbieri , Federica Barbieri , Alberto Danioni , Edoardo Marino , Sergio Pernici
- Applicant: STMICROELECTRONICS S.R.L.
- Applicant Address: IT Agrate Brianza
- Assignee: STMicroelectronics S.r.l.
- Current Assignee: STMicroelectronics S.r.l.
- Current Assignee Address: IT Agrate Brianza
- Agency: Seed IP Law Group PLLC
- Priority: ITTO2014A0578 20140722
- Main IPC: H04R3/00
- IPC: H04R3/00 ; H04R19/04

Abstract:
A MEMS acoustic transducer device has a capacitive microelectromechanical sensing structure and a biasing circuit. The biasing circuit includes a voltage-boosting circuit that supplies a boosted voltage on an output terminal, and a high-impedance insulating circuit element set between the output terminal and a terminal of the sensing structure, which defines a first high-impedance node associated with the insulating circuit element. The biasing circuit has: a pre-charge stage that generates a first pre-charge voltage on a first output thereof, as a function of, and distinct from, the boosted voltage; and a first switch element set between the first output and the first high-impedance node. The first switch element is operable for selectively connecting the first high-impedance node to the first output, during a phase of start-up of the biasing circuit, for biasing the first high-impedance node to the first pre-charge voltage.
Public/Granted literature
- US20160029129A1 BIASING CIRCUIT FOR A MEMS ACOUSTIC TRANSDUCER WITH REDUCED START-UP TIME Public/Granted day:2016-01-28
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