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:
Nov. 09, 1976
Filed:
Feb. 14, 1975
Wouter Smeulers, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A film circuit which realizes a time constant the equivalent of a large RC time constant without the use of capacitors of comparatively large dimensions. The circuit includes a differential amplifier, to the first input of which an input signal is applied and at the second input of which an output signal is produced, in such a way that said output signal follows the d.c. level of the input signal, while rapid fluctuations of the input signal are not followed. The output signal is taken from a voltage divider which is included between the supply terminals and which comprises at least one temperature sensitive element which is in direct thermal contact with a heating resistance layer which is included in at least one of the outputs of the differential amplifier.