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:
Jan. 06, 2009
Filed:
Jul. 16, 2007
Applicant:
Sheng-jui Huang, Hsinchu, TW;
Inventor:
Sheng-Jui Huang, Hsinchu, TW;
Assignee:
Mediatek Inc., Hsin-Chu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An operational amplifier is disclosed. The operational amplifier comprises an input stage and a loading stage. The input stage receives a differential input signal pair corresponding to a first frequency band. The loading stage is coupled to the input stage. The loading stage outputs an amplified differential output at output nodes. The loading stage comprises a flicker noise source and a modulating device. The modulating device is coupled to the flicker noise source. The modulating device modulates flicker noises into a second frequency band. The modulating device is not within a signal path.