Patent · US Expired

Detector for indicating frequency deviation peaks

US4653116A · kind A · utility

6Cited by

4References

23Claims

0Family size

Assignees

U.S. Philips Corporation · US
Hans Kolbe & Co. · DE

Inventors

Heinz Lindenmeier · Planegg, DE
Ernst Manner · Ottobrunn, DE
Gerhard Flachenecker · Ottobrunn, DE

Key dates

Filing date	Jan 23, 1985
Grant date	Mar 24, 1987
Priority date	—
Expiry date	Jan 23, 2005

Classification

Technology area (CPC H)Electricity
CPC primaryH03D3/00
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

A detector for indicating reception disturbances during ultrashort wave broadcast reception by demodulating of intermediate frequency signals has a frequency modulated demodulator with a demodulation characteristic line formed so that a controlling region within which the output signal increases with increasing frequency deviation from a carrier frequency extends advantageously over the entire band width of the ultrashort wave intermediate frequency channel and is significantly greater than the maximum frequency deviation of the intermediate frequency carrier modulated with the basic band signal in the frequency, and the output signal of the frequency demodulator is supplied to an evaluating circuit at whose output the exceeding of a predetermined frequency disturbance deviation threshold is indicated by a logic signal.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.