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:
Feb. 15, 2011
Filed:
Oct. 27, 2009
Applicant:
Raymond Barnett, Farmington, MN (US);
Inventor:
Raymond Barnett, Farmington, MN (US);
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
H03F 1/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
Chopper stabilized operational amplifiers are in common use. One drawback of these amplifiers, however, is that there is an inherent tone present at the chopper frequency. Conventional circuits have attempted to reduce the effects of this tone by using various filtering schemes, such as a notch filter. Here, however, a track-and-hold circuit is used in conjunction with matched amplifiers to compensate for this tone.