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. 07, 1978
Filed:
Mar. 14, 1977
Jens Hansen, Hildesheim, DE;
Blaupunkt-Werke GmbH, Hildesheim, DE;
Abstract
A signal being received and superimposed disturbance pulses are taken from a stage of the receiver where the signal is a periodic wave of constant amplitude or of amplitude varying at rates limited by a moderate modulation band, and the signal so picked up is AC-coupled to a diode clamp circuit, the clamp voltage then being amplified to produce a control output for a blanking gate. The forward voltage of the diode is insufficient to put the transistor of the following amplifier into its conducting condition, so that the transistor conducts only when a disturbance pulse extends beyond the limits of the envelope of the sinusoidal signal. By the use of a phase splitter, two identical clamp circuits may be operated to detect disturbance pulses of opposite polarity, and their outputs may be combined to provide blanking control pulses whenever a disturbance pulse of either polarity appears.