Transmitter for pulsed electronic article surveillance systems

Details Transmitter for pulsed electronic article surveillance systems Transmitter for pulsed electronic article surveillance systems

1994-08-30

1997-06-17

Mullen, Thomas

Telecommunications

Transmitter

Power control, power supply, or bias voltage supply

330127, 340572, H04B 104

Patent

active

056406932

ABSTRACT:
An electronic article surveillance (EAS) system includes a pulsed EAS transmitter, a linear power amplifier having active devices for linear amplification of signals input thereto and a controller for energizing the linear power amplifier active devices correspondingly with transmitter pulsations. A transmitter for use in electronic article surveillance, comprises a transmitting antenna, a source providing a succession of mutually spaced bursts of high-frequency signals, a linear power amplifier having active devices for linear amplification of the succession of mutually spaced bursts of high-frequency signals and a controller for selectively energizing the linear power amplifier active devices. The controller maintains the linear power amplifier active devices unenergized between successive of the mutually spaced bursts of high-frequency signals.

REFERENCES:
patent: 3714653 (1973-01-01), Thor et al.
patent: 4268797 (1981-05-01), Buck et al.
patent: 5239696 (1993-08-01), Balch et al.

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