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:
Sep. 24, 1991
Filed:
Jul. 20, 1989
Bruce D Rosenthal, Los Gatos, CA (US);
Teledyne Industries, Mountain View, CA (US);
Abstract
A precision resistor comparator provides for the comparison and the resistive value of a first resistor with the predetermined resistive value of a second resistor. A differential comparator and level shifter provides a digital signal indicative of the relative magnitude of the first and second resistors. Another aspect of the present invention is the provision of the second resistor on a monolithic substrate with the resistor comparator circuit. The second resistor is provided with a temperature coefficient that is substantially independent of variances in its fabrication parameters and a resistance that can be trimmed, following fabrication, with substantially no effect on the temperature coefficient of the second resistor.