Signal channel range change circuit

Claim 1

A SIGNAL CHANNEL RANGE CHANGING CIRCUIT COMPRISING (A) A SIGNAL AMPLIFYING CHANNEL HAVING AN INPUT AND AN OUTPUT, (B) MEANS FOR APPLYING A VARIABLE AMPLITUDE INPUT SIGNAL TO THE INPUT OF SAID AMPLIFYING CHANNEL (C) A FEEDBACK PATH CONNECTED BETWEEN SAID OUTPUT AND SAID INPUT HAVING A VARIABLE FEEDBACK MEANS COMPRISING A FIRST RESISTOR WHICH IS SERIALLY CONNECTED IN SAID FEEDBACK PATH BETWEEN SAID OUTPUT AND SAID INPUT, AND AT LEAST ONE OTHER RESISTOR WHICH IS CONNECTED IN SHUNT WITH SAID FIRST RESISTOR AND IS ADAPTED TO BE SWITCHED OUT OF SAID FEEDBACK PATH IN ACORDANCE WITH A PREDETERMINED AMPLITUDE OF SAID INPUT SIGNAL FOR CONTROLLING THE AMOUNT OF FEEDBACK IN SAID FEEDBACK PATH, (D) AT LEAST ONE SWITCH MEANS COUPLED TO SAID OTHER RESISTOR FOR DISCONNECTING SAID OTHER RESISTOR FROM SAID FIRST RESISTOR IN SAID FEEDBACK PATH WHEN SAID SWITCH MEANS IS ACTUATED, (E) AT LEAST ONE LEVEL SENSING DEVICE COUPLED BETWEEN SAID INPUT AND SAID SWITCH MEANS FOR ACTUATING SAID SWITCH MEANS IN RESPONSE TO PREDETERMINED AMPLITUDE OF SAID INPUT SIGNAL OF DISCONNECTING SAID OTHER RESISTOR FROM SAID FEEDBACK PATU TO INCREASE THE FEEDBACK AS LONG AS SAID SWITCH IS ACTUATED, WHEREBY MORE FEEDBACK IS APPLIED FOR HIGHER AMPLITUDE INPUT SIGNALS TO EXPAND THE RANGE OF SIGNALS WHICH MAY BE HANDLED IN A LINEAR FASHION BY SAID AMPLIFYING CHANNEL.