Gain control circuit for radio transmitter

Details Gain control circuit for radio transmitter Gain control circuit for radio transmitter

1991-12-30

1993-06-22

Kuntz, Curtis

Pulse or digital communications

Repeaters

Testing

375 60, 332103, 332155, H04L 2549

Patent

active

052221040

ABSTRACT:
A gain control circuit for a radio transmitter, such as the radio transmitter portion of a radiotelephone operative to transmit a .pi./4 DQPSK-modulated signal in discrete bursts. The signal portion of the signal transmitted during each discrete burst forms a slot and at least one of the slots includes a pre-determined data sequence portion. The peak power level of the portion of the slot comprising the pre-determined data sequence portion, once amplified by amplifier circuitry of the radiotelephone, is compared with a stored value representative of the peak power level of a corresponding portion of a slot amplified to be of a desired signal level. Responsive to such comparison, the amplification level of the amplifier circuitry is altered.

REFERENCES:
patent: 3900823 (1975-08-01), Sokal et al.
patent: 4199723 (1980-04-01), Cummings et al.
patent: 4286236 (1981-08-01), Fischer
patent: 4592073 (1986-05-01), Watanabe
patent: 4706262 (1987-11-01), Ohta

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