The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 24, 2021
Filed:
Jun. 03, 2019
Applicant:
Cirel Systems Private Limited, Bangalore, IN;
Inventors:
Rinu Mathew, Calicut, IN;
Leela Madhav Lakkimsetti, Bangalore, IN;
Assignee:
CIREL SYSTEMS PRIVATE LIMITED, Bangalore, IN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 1/34 (2006.01); H03F 3/45 (2006.01); H03F 1/30 (2006.01); G01L 9/12 (2006.01);
U.S. Cl.
CPC ...
H03F 1/342 (2013.01); H03F 1/301 (2013.01); H03F 3/45179 (2013.01); G01L 9/12 (2013.01); H03F 2200/03 (2013.01); H03F 2200/129 (2013.01); H03F 2200/228 (2013.01); H03F 2200/294 (2013.01); H03F 2200/75 (2013.01); H03F 2203/45512 (2013.01);
Abstract
A common source preamplifier for a MEMS capacitive sensor is disclosed. The preamplifier is a single-stage amplifier employing negative feedback. The preamplifier provides stable gain independent of temperature and at the same time provides effective buffering for a subsequent stage. Further, the preamplifier may be configured to provide different values of gain. Furthermore, the preamplifier has lower noise and consumes lesser area and lesser power than prior art.