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. 09, 2013
Filed:
May. 21, 2009
Doris Po Ching Chan, Santa Clara, CA (US);
Simardeep Maangat, Sunnyvale, CA (US);
Thungoc M. Tran, San Jose, CA (US);
Sergey Shumarayev, Los Altos Hills, CA (US);
Doris Po Ching Chan, Santa Clara, CA (US);
Simardeep Maangat, Sunnyvale, CA (US);
Thungoc M. Tran, San Jose, CA (US);
Sergey Shumarayev, Los Altos Hills, CA (US);
Altera Corporation, San Jose, CA (US);
Abstract
An equalizer circuitry that includes an equalizer stage having a programmable current source is described. In one implementation, the programmable current source cancels voltage offset. Also, in one implementation, the programmable current source is programmable in user mode. Furthermore, in one implementation, the equalizer circuitry includes a plurality of equalizer stages including the equalizer stage having a programmable current source, where the equalizer stage having a programmable current source is a second equalizer stage in the plurality of equalizer stages. Also, in one implementation, the programmable current source includes a plurality of current sources coupled in parallel and a plurality of sets of control switches for controlling the plurality of current sources. Further, in one implementation, each current source of the plurality of current sources includes a transistor and each set of control switches of the plurality of sets of control switches is for controlling a respective current source and includes a pair of transistors for controlling the respective current source.