Invention Grant
- Patent Title: Circuit for sensing an analog signal, corresponding electronic system and method
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Application No.: US16738459Application Date: 2020-01-09
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Publication No.: US11193952B2Publication Date: 2021-12-07
- Inventor: Marco Zamprogno
- 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: Slater Matsil, LLP
- Priority: IT102019000000989 20190123
- Main IPC: G01P15/00
- IPC: G01P15/00 ; H03M1/00 ; G01P15/12 ; G01B7/16 ; G01K7/18 ; G01L9/06 ; G02B26/08 ; G02B26/10

Abstract:
A circuit configured to sense an input analog signal generated by a sensor at a first frequency and to generate an output digital signal indicative of the sensed input analog signal. The circuit includes a conditioning circuit, an ADC, a feedback circuit, and a low-pass filter. The conditioning circuit is configured to receive the input analog signal and to generate a conditioned analog signal. The ADC is configured to provide a converted digital signal based on the conditioned analog signal. The feedback circuit includes a band-pass filter configured to selectively detect a periodic signal at a second frequency higher than the first frequency and to act on the conditioning circuit to counter variations of the periodic signal at the second frequency. The low-pass filter is configured to filter out the periodic signal from the converted digital signal to generate the output digital signal.
Public/Granted literature
- US20200233009A1 CIRCUIT FOR SENSING AN ANALOG SIGNAL, CORRESPONDING ELECTRONIC SYSTEM AND METHOD Public/Granted day:2020-07-23
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