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:
Dec. 28, 1976
Filed:
Jun. 30, 1975
Jens Hansen, Hildesheim, D;
Blaupunkt-Werke GmbH, Hildesheim, D;
Abstract
A circuit resonant at a frequency above the frequency band occupied by a signal to be protected is set into damped oscillations by high-frequency components of an interfering pulse and produces a voltage spike at the beginning of the interfering pulse. A differentiator circuit produces a close succession of a pair of oppositely polarized spikes in response to the spike produced by the resonant circuit, while substantially eliminating the rest of the signal and a switching transistor is caused to discharge a capacitor suddenly when the positive-going spike of the pair reaches it. The common connection point of the coil, capacitor and resistor of the resonant circuit is a point at which a delayed signal is obtained and the signal to be protected is thus provided with the benefit of this delay before it is subjected to blanking by the pulse produced at the collector of the switching transistor.