A multi-frequency resonant tag circuit for use with an electroni

Details A multi-frequency resonant tag circuit for use with an electroni A multi-frequency resonant tag circuit for use with an electroni

1974-07-19

1976-06-29

Caldwell, John W.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340280, 340258C, 336200, 336232, H02B 104, H02B 900, G08B 2100

Patent

active

039671615

ABSTRACT:
An electronic security system adapted for use in a controlled area such as a retail store and employing a multi-frequency resonant tag circuit having distinct frequencies for detection and discrimination. An electromagnetic field is provided within the controlled area at a frequency which is swept through a range including the detection frequency of the resonant tag circuit. In the presence of a tag circuit within the controlled area, pulses are detected by a receiver which includes noise rejection circuitry for discriminating true signals from noise. The noise rejection circuitry is sensitive to expected signals and operative to discriminate true signals from noise on the basis of several different criteria, resulting in substantially reduced false alarm actuation.

REFERENCES:
patent: 3810147 (1974-05-01), Lichtblau

Affiliated with

Also associated with

Rating

A multi-frequency resonant tag circuit for use with an electroni does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with A multi-frequency resonant tag circuit for use with an electroni, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A multi-frequency resonant tag circuit for use with an electroni will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1280740