Burst signal transmission system
AssigneeNEC Corporation
InventorKyoji Watanabe
Life of this patent
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Abstract
A signal control circuit for a burst signal transmission system has a comparator for receiving a burst control signal from a burst control signal generator and an output signal from an envelope detector and for generating a difference signal therebetween. The difference signal is supplied to an attenuator, a preamplifier or a nonlinear power amplifier for receiving a modulated carrier wave so as to control attenuation of the attenuator or gain of the preamplifier or nonlinear power amplifier whereby a waveform of the output signal from the nonlinear amplifier is made analogous to that of the burst control signal from the burst control signal generator.
Claims7
A signal control circuit for a burst signal transmission system comprising:
- a main channel including a preamplifier for receiving a modulated carrier signal having a fixed envelope and a nonlinear amplifier for amplifying an output from the preamplifier;
- an envelope detector for detecting an envelope of an output signal from said nonlinear amplifier;
- a burst control signal generator for generating a burst control signal for the modulated carrier signal having smoothed leading and trailing edges;
- and
- control means, responsive to output signals of said envelope detector and burst control signal generator, for controlling the main channel so that a waveform of the output signal from said nonlinear amplifier is made analogous to that of the burst control signal from said burst control signal generator.
Dependencies are inferred from the claim text.