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:
Jun. 21, 2005
Filed:
Jan. 30, 2003
Kenneth D. Poulton, Palo Alto, CA (US);
Robert M. R. Neff, Palo Alto, CA (US);
Jorge A. Pernillo, Daly City, CA (US);
Mehrdad Heshami, Palo Alto, CA (US);
Kenneth D. Poulton, Palo Alto, CA (US);
Robert M. R. Neff, Palo Alto, CA (US);
Jorge A. Pernillo, Daly City, CA (US);
Mehrdad Heshami, Palo Alto, CA (US);
Agilent Technologies, Inc., Palo Alto, CA (US);
Abstract
A line driver fabricated from CMOS devices that provides a substantially constant output impedance over a significant range of a time-varying input voltage includes a time-varying current source, a pair of CMOS output loads, and a pair of biasing circuits. Each CMOS output load includes a NMOS transistor and a PMOS transistor connected in parallel and each biased into a linear range of operation. In response to a time-varying input voltage, the time-varying current source draws current from the pair of CMOS output loads in a manner that operates each CMOS output load to collectively establish a time-varying output voltage component at an associated output terminal.