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:
Jun. 28, 1977
Filed:
Feb. 20, 1976
Applicant:
Inventor:
Dietmar Mallon, Zorneding, DT;
Assignee:
Siemens Aktiengesellschaft, Berlin & Munich, DT;
Primary Examiner:
Int. Cl.
CPC ...
H04H / ;
U.S. Cl.
CPC ...
179 / ;
Abstract
A sum signal and a difference signal of two reproduction signals, in addition to a pilot tone, are obtained from a received signal in a circuit arrangement for a stereo-hunting device in a stereo decoder. The sum and difference signals are converted by way of a matrix operating with sum and difference formation to form the reproduction signals. In the case of a mono-received signal only the sum signal is present. The sum signal channel has connected therein an attenuator which has a control input for receiving a control voltage and in the absence of the pilot tone the control voltage causes the sum signal channel to become blocked.