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:
Mar. 28, 2017
Filed:
Jul. 09, 2014
Applicant:
Texas Instruments Incorporated, Dallas, TX (US);
Inventor:
Michael D. Seeman, San Jose, CA (US);
Assignee:
TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
G01R 19/00 (2006.01); G01R 1/30 (2006.01); H03F 3/04 (2006.01); H03F 3/45 (2006.01); H03F 3/217 (2006.01); H02M 1/00 (2006.01);
U.S. Cl.
CPC ...
G01R 19/0092 (2013.01); G01R 1/30 (2013.01); H03F 3/04 (2013.01); H03F 3/2173 (2013.01); H03F 3/45071 (2013.01); H03F 3/45475 (2013.01); H02M 2001/0009 (2013.01); H03F 2200/129 (2013.01); H03F 2200/351 (2013.01); H03F 2203/45022 (2013.01); H03F 2203/45156 (2013.01); H03F 2203/45528 (2013.01);
Abstract
A circuit for sensing current in a capacitive network. A first capacitor carries a first current. A second capacitor is connected to the first capacitor thereby forming a current divider. The second capacitor carries a second current which is proportional to the first current. A transimpedance amplifier is connected to the second capacitor and has a voltage output that is proportional to the second current. Using a current feedback amplifier as the transimpedance amplifier significantly improves bandwidth and stability.