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. 30, 1976
Filed:
Aug. 14, 1975
Jens Hansen, Hildesheim, DT;
Blaupunkt-Werke GmbH, Hildesheim, DT;
Abstract
Radio frequency disturbance recognition circuits having their inputs tuned to different frequency bands by resonant circuits are coupled to the antenna input of a receiver to be protected through a decoupling stage that prevents excessive coupling and AND-gates are provided so that an interference blanking circuit will be operated to produce a momentary interruption of the low-frequency signal path only when a disturbance is detected by the radio frequency recognition circuits in both of their respective operating frequency ranges and at the same time a pulse disturbance is detected in the output of the receiver demodulator by a disturbance voltage detector circuit tuned to a frequency band higher than the frequency band of the low-frequency signal to be protected.