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:
Apr. 21, 2020
Filed:
Sep. 10, 2018
Texas Instruments Incorporated, Dallas, TX (US);
Dimitar Trifonov, Vail, AZ (US);
Biraja Prasad Dash, Tucson, AZ (US);
Ravinthiran Balasingam, Tucson, AZ (US);
TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US);
Abstract
A six phase capacitively coupled chopper amplifier. Two phases provide a zeroing phase to zero the feedback capacitors and set the input common mode value. Two phases provide a passive transfer of an input charge from the input capacitors to the zeroed feedback capacitors. The final two phases are chopping and amplification phases. The zeroing phases address the input common mode without the need for biasing resistors. The passive transfer phases resolve the glitching that occurs if the feedback capacitors have to be recharged on each cycle of the chopping clock. Resolving the glitching and the charge time allows the frequency of the amplifier to increase.