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:
Oct. 21, 1986
Filed:
Dec. 14, 1984
Applicant:
Inventor:
Steven P Parfitt, Johnson City, TN (US);
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
H03M / ;
U.S. Cl.
CPC ...
3403 / ; 3403 / ;
Abstract
A circuit for converting analog to digital data uses a CMOS multiplexer, an analog to digital converter and an operational amplifier buffer controlled by a single chip microprocessor. An FET shunt circuit is connected to the input of the operational amplifier in order to pull the input to ground during a conversion cycle of the converter and the resulting data is read and used to adjust the data from subsequent data conversions to correct for offsets of the operational amplifier and the converter.