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:
Mar. 25, 2003
Filed:
Jul. 18, 2002
Applicant:
Inventor:
Runhua Sun, Tustin, CA (US);
Assignee:
Globespanvirata, Inc., Red Bank, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/45 ;
U.S. Cl.
CPC ...
H03F 3/45 ;
Abstract
A two-stage op-amp circuit including a double-cascode telescopic op-amp circuit in the input stage and a fully-differential op-amp circuit in the output stage and having very high open-loop DC gain, very high unity-gain frequency, and relatively very low power consumption is presented. The input stage op-amp circuit and the output stage op-amp circuit are each comprised of a plurality of electrically connected MOSFET's. The input stage op-amp circuit provides very high gain, high input resistance, and large common mode rejection. The output stage op-amp circuit provides gain, low output resistance, and minimal output loss.