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:
Dec. 21, 2010
Filed:
Apr. 19, 2006
Mei Luo, San Jose, CA (US);
Sergey Shumarayev, San Leonardo, CA (US);
Thungoc M. Tran, San Jose, CA (US);
Simardeep Maangat, Sunnyvale, CA (US);
Mei Luo, San Jose, CA (US);
Sergey Shumarayev, San Leonardo, CA (US);
Thungoc M. Tran, San Jose, CA (US);
Simardeep Maangat, Sunnyvale, CA (US);
Altera Corporation, San Jose, CA (US);
Abstract
Methods and apparatus are provided for selectively setting a CM voltage for a transceiver, reducing the effect of current mismatch, and generating a voltage step that can be used for receiver detection. A circuit of the invention can include voltage generator circuitry operable to generate a plurality of voltage signals of substantially different voltages. The circuit can also include multiplexer circuitry with voltage inputs coupled to the voltage signals. The multiplexer circuitry can be operable to select a reference signal from among the voltage inputs. In addition, the circuit can include operational amplifier ('op-amp') circuitry with a first input coupled to the reference signal and a second input coupled to an output signal of the op-amp circuitry.