System and method for synchronizing a receiver of an electronic

Details System and method for synchronizing a receiver of an electronic System and method for synchronizing a receiver of an electronic

1993-06-16

1995-10-31

Swann, Glen

Communications: electrical

Condition responsive indicating system

Specific condition

340551, G08B 13187

Patent

active

054633761

ABSTRACT:
An electronic article surveillance system of type including a transmitter for providing in a preselected area an electromagnetic field periodically swept in frequency over a predetermined range of frequencies for causing tags in the preselected area to generate tag signals containing a frequency within the predetermined range of frequencies and a receiver including a detector for receiving the tag signals and providing output indication of detected tag signals, has a modulator in its transmitter which modulates the electromagnetic field and a modulation responsive circuit in its receiver for synchronizing the detector with the frequency of the electromagnetic field.

REFERENCES:
patent: 4429302 (1984-01-01), Vandebuilt
patent: 5103209 (1992-04-01), Lizzi et al.

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