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:
May. 10, 2005
Filed:
Oct. 25, 2000
Axel Thomsen, Austin, TX (US);
Edwin DE Angel, Austin, TX (US);
Sherry Wu, Austin, TX (US);
Lei Wang, Chelmsford, MA (US);
Aryesh Amar, Nashua, NH (US);
Axel Thomsen, Austin, TX (US);
Edwin De Angel, Austin, TX (US);
Sherry Wu, Austin, TX (US);
Lei Wang, Chelmsford, MA (US);
Aryesh Amar, Nashua, NH (US);
Cirrus Logic, Inc., Austin, TX (US);
Abstract
A signal processing integrated circuit has having a chopper stabilized, multistage, feedforward amplifier and a delta sigma analog to digital converter. Filtering of the output of the output from the analog to digital converter comprises a sincfilter and a sincfilter. The sincfilter may be bypassed. A rough buffer permits quick charging of a sample and hold capacitor during part of the charge cycle and slower but more accurate charging during the remainder of the charge cycle.