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. 15, 2008
Filed:
Dec. 07, 2005
Applicant:
Mingdeng Chen, Harleysville, PA (US);
Inventor:
Mingdeng Chen, Harleysville, PA (US);
Assignee:
Agere Systems Inc., Allentown, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 1/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
Certain embodiments of the present invention relate to techniques for tuning or measuring operational features of amplifiers, such as the transconductance of operational transconductance amplifiers (OTAs) and the gain of variable gain amplifiers (VGAs). Each technique employs (at least) two phases that involve the application of different input voltages. The results of the multiple phases are then combined to generate a final result that negates or reduces the effects of real-world properties such as finite output impedances and offset voltages.