Frequency identification circuit for broadcast traffic informati

Details Frequency identification circuit for broadcast traffic informati Frequency identification circuit for broadcast traffic informati

1975-02-21

1976-04-06

Safourek, Benedict V.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

325 55, 340171R, H04B 700

Patent

active

039494012

ABSTRACT:
Frequencies which respectively identify a particular transmitter, and a particular program content, and which are in a very low frequency range (from between 20 to 125 kHz can be recognized, and ditigal output control signals derived representative of whether one, or both, or none of these frequencies are present by use of a frequency selection input circuit, controlled by a change-over switch to initially select recognition of the transmitter identification which, if positive, is applied through a storage circuit having a storage time substantially longer than the switch-over rate, to provide an output signal if the selected transmitter is recognized, and hold that output signal during switch-over of the program content identification signal which, if present, will be fed back through a logic circuit to hold the output of the transmitter identification circuit as identified, and if not present, permit continued switch-over of the frequency identification circuit to continue to store transmitter identification signals, if present, but permit these signals to disappear, after the storage time, if the transmitter identification signals also cease. The time delay and storage circuit preferably include operational amplifiers, and the frequency identification circuit includes a phase-locked loop.

REFERENCES:
patent: 2429607 (1947-10-01), Capen
patent: 3746991 (1973-07-01), Gautney
patent: 3824469 (1974-07-01), Pistonbatt

Affiliated with

Also associated with

Rating

Frequency identification circuit for broadcast traffic informati does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Frequency identification circuit for broadcast traffic informati, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frequency identification circuit for broadcast traffic informati will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1580337