Solid state high speed scanning compensator switch for sonar

Claim 1

A solid state high speed scanning compensator switch for sonar receivers comprising: a plurality of hydrophone signal inputs; circuit means coupled to said inputs capable of filtering, buffering and limiting said hydrophone signals individually and conducting same to an equal number of outputs therefrom; a solid state switch array having a plurality of control inputs and a plurality of signal outputs, said solid state switch array being coupled to said circuit means outputs; a demultiplexer having a plurality of signal inputs coupled respectively to said switch array signal outputs, having a three input control and a plurality of signal outputs; a delay line having a plurality of input taps coupled respectively to said plurality of demultiplexer outputs and having a single signal output being the sum of all delayed signals; a passive bandpass filter having an input coupled to said delay line output and having an output adapted to be coupled to a display device with a display system power system; an oscillator coupled through digital register circuits having outputs coupled to said control inputs of said switch array, having three outputs coupled to said three input control of said demultiplexer, and having outputs coupled through read only memory circuits and digital-to-analog converter circuits to produce analog voltage synchro reference signals, modulated by ramp function voltages and adapted for driving the beam of the display device, and test signal outputs coupled through test selector switch means to said circuit means to test continuity of simulated signals to the passive bandpass filter output whereby the oscillator provides proper digital frequencies on said digital register outputs to produce rapid scan switching of said switch array and demultiplexer and analog voltages to drive the synchro of the display device to produce target range and direction information of targets producing said hydrophone signals.