Control apparatus for preventing amplifier saturation

Claim 1

A MULTIPURPOSE CIRCUIT FOR AMPLIFYING DIFFERENT INPUT SIGNALS IN DIFFERENT WAYS COMPRISING: AN AMPLIFIER HAVING AN INPUT AND A DIFFERENTIAL OUTPUT; FIRST AND SECOND INPUT SIGNAL MEANS; CAPACITANCE MEANS; FIRST RELAY MEANS HAVING A NORMALLY CLOSED CONTACT AND FIRST AND SECOND NORMALLY OPEN CONTACTS, SAID NORMALLY CLOSED CONTACT CONNECTING SAID FIRST INPUT SIGNAL MEANS TO THE INPUT OF SAID AMPLIFIER, SAID FIRST NORMALLY OPENED CONTACT ADAPTED TO CONNECT SAID SECOND INPUT SIGNAL TO THE INPUT OF SAID AMPLIFIER AND SAID SECOND NORMALLY OPENED CONTACT ADAPTED TO CONNECTED ONE SIDE OF SAID CAPACITANCE MEANS TO ONE SIDE OF SAID DIFFERENTIAL OUTPUT; IMPEDANCE MEANS CONNECTING THE OTHER SIDE OF SAID CAPACITANCE MEANS TO THE INPUT OF SAID AMPLIFIER; AND TIMING RLAY MEANS, OPERATIVE UPON THE ACTIVATION OF SAID FIRST RELAY MEANS, AND OPERABLE TO CLOSE FOR A PREDETERMINED TIME, SAID TIMING RELAY HAVING A NORMALLY OPEN CONTACT AND A NORMALLY CLOSED CONTACT, THE NORMALLY CLOSED CONTACT OF SAID TIMING RELAY CONNECTED FROM THE OTHER SIDE OF SAID DIFFERENTIAL OUTPUT TO A SOURCE OF REFERENCE POTENTIAL AND THE NORMALLY OPEN CONTACT OF SAID TIMING RELAY ADAPTED TO CONNECT THE OTHER SIDE OF SAID CAPACITANCE MEANS TO SAID OTHER SIDE OF SAID DIFFERENTIAL OUTPUT WHEREBY, UPON ACTIVATION OF SAID FIRST AND SECOND RELAYS, SAID CAPACITANCE MEANS IS CONNECTED ACROSS SAID DIFFERENTIAL OUTPUT, AND SAID IMPEDANCE MEANS IS DEGENERATIVELY CONNECTED FROM THE OUTPUT TO THE INPUT OF THE AMPLIFIER SO AS TO DECREASE THE AMPLIFIER GAIN BY A PREDETERMINED AMOUNT, AND WHEREBY UPON THE DEACTIVATION OF SAID TIMING RELAY AFTER SAID PREDETERMINED TIME, SAID CAPACITANCE MEANS AND SAID IMPEDANCE MEANS OPERATE AS A POSITIVE RATE FEEDBACK CIRCUIT BETWEEN THE OUTPUT AND THE INPUT OF SAID AMPLIFIER.