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:
Jan. 13, 2015
Filed:
May. 18, 2012
Wilson Wong, San Francisco, CA (US);
Weiqi Ding, Fremont, CA (US);
Shuxian Chen, Fremont, CA (US);
Simardeep Maangat, San Jose, CA (US);
Albert Ratnakumar, San Jose, CA (US);
Wilson Wong, San Francisco, CA (US);
Weiqi Ding, Fremont, CA (US);
Shuxian Chen, Fremont, CA (US);
Simardeep Maangat, San Jose, CA (US);
Albert Ratnakumar, San Jose, CA (US);
Altera Corporation, San Jose, CA (US);
Abstract
A first trimming capacitor having a first terminal and a second terminal is coupled in parallel between a first terminal and a second terminal of a first capacitor. The first trimming capacitor comprises a first plurality of switched capacitors having different capacitances coupled in parallel. Each of the switched capacitors comprises a switch capacitor and a switch coupled in series. In an illustrative application the first capacitor and the first trimming capacitor are coupled between an output terminal of an operational amplifier (op-amp) and an inverting input terminal of the op-amp. A second capacitor and a second trimming capacitor similar to the first capacitor and the first trimming capacitor are coupled between an input and the inverting input terminal of the op-amp.