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:
Aug. 06, 1991
Filed:
Aug. 04, 1989
Applicant:
Inventor:
Gerhard Krause, Rosenheim, DE;
Assignee:
Steinheil Optronik GmbH, Ismaning, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01J / ;
U.S. Cl.
CPC ...
2502081 ; 2502 / ; 250332 ;
Abstract
A circuit arrangement for infrared detectors, more especially for thermal viewing devices with photoresistors as detector elements is designed in order so as not to necessitate an input amplifier and an output amplifier for each detector. For this purpose the collector current of a transistor is integrated for a scan period in a capacitor and at the end of the scan period the capacitor is discharged through an electronic switch to a present potential.