Direct-coupled amplifier

Claim 1

AN ANALOG AMPLIFIER COMPRISING: A HIGH-GAIN, DIRECTCURRENT AMPLIFYING CIRCUIT HAVING AN OUTPUT CIRCUIT INCLUDING TWO OUTPUT TERMINALS, ONE OF WHICH IS CONNECTED TO A SOURCE OF REFERENCE POTENTAL, AND AN INPUT CIRCUIT HAVING TWO INPUT TERMINALS; A VOLTAGE-DIVIDING NETWORK INCLUDING TWO RESISTORS SERIALLY CONNECTED BETWEEN SAID OUTPUT TERMINALS FOR PRODUCING A NEGATIVE FEEDBACK SIGNAL AT A JUNCTION BETWEEN SAID TWO RESISTORS; A COUPLING RESISTOR CONNECTED IN SERIES BETWEEN ONE OF SAID INPUT TERMINALS AND SAID DIRECT-CURRENT AMPLIFYING CIRCUIT; A STORAGE CAPACITOR; DIRECT-CURRENT CONDUCTIVE MEANS FOR CONNECTING SAID STORAGE CAPACITOR IN PARALLEL WITH SAID COUPLING RESISTOR; A TRANSFORMING CAPACITOR; AND A SWITCHING MEANS FOR ALTERNATELY CONNECTING SAID TRANSFORMING CAPACITOR BETWEEN SAID JUNCTION AND SAID SOURCE OF REFERENCE POTENTIAL TO THEREBY CHARGE IT TO THE VOLTAGE OF SAID NEGATIVE FEEDBACK SIGNAL AND IN PARALLEL WITH SAID STORAGE CAPACITOR TO THEREBY CHARGE SAID STORAGE CAPACITOR, WHEREBY SAID STORAGE CAPACITOR CONTINUALLY CHARGED BY SAID TRANSFORMING CAPACITOR AND DISCHARGED THROUGH SAID COUPLING RESISTOR PROVIDES A NEGATIVE FEEDBACK SIGNAL TO SAID DIRECT-CURRENT AMPLIFYING CIRCUIT.