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:
Jul. 06, 2004
Filed:
Jul. 01, 2002
Applicant:
Inventors:
David Alexander Gammie, Tucson, AZ (US);
Jeffrey B. Parfenchuck, Tucson, AZ (US);
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 3/500 ; H01L 3/700 ; H03K 3/42 ; H03K 1/778 ;
U.S. Cl.
CPC ...
H01L 3/500 ; H01L 3/700 ; H03K 3/42 ; H03K 1/778 ;
Abstract
The present invention overcomes the disadvantages of the prior art and provides a new temperature compensation trimming technique. Temperature compensated output is provided in a logarithmic voltage output device by the steps of: measuring the resistance of a first resistor, a second resistor, and a third resistor at a first temperature; measuring again the resistances of the first resistor, second resistor, and third resistor at a second temperature; and trimming the drift of the third resistor according to a calculated temperature compensation trim.