Solid state switcher for radio broadcast programming

Claim 1

A balanced solid state switch for audio frequency signal switching comprising first and second junction field effect transistors each having gate, source and drain electrodes, first and second audio signal input terminals defining a single audio channel, a first resistance divider comprising a first series resistor and a first shunt resistor coupling said first input terminal to one of said source and drain electrodes of said first transistor, a first output impedance coupled to the other of said source and drain electrodes of said first transistor, a second resistance divider comprising a second series resistor and a second shunt resistor coupling said second input terminal to one of said source and drain Electrodes of said second transistor, a second output impedance coupled to the other of said source and drain electrodes of said second transistor, all of said first resistors and said first impedance being equal in value to the corresponding ones of said second resistors and said second impedance to provide a balanced single channel circuit, a control terminal whereby said transistors are switched on and off by the application of forward and reverse bias potentials to said control terminal, and a control resistor directly connecting said control terminal to said transistor gates.