Gain setting switching circuit responsive to automatically emitted digital levels

Claim 1

A CIRCUIT FOR PROVIDING TRANSIENT-FREE GAIN SETTINGS IN AN AMPLIFIER FOR AMPLIFYING INFORMATION-CONTAINING SIGNALS AND PRESENTING THEM AT AN OUTPUT TO A UTILIZATION CIRCUIT, SAID AMPLIFIER BEING CAPABLE OF ASSUMING A PLURALITY OF DISTINCT GAIN SETTINGS AS A FUNCTION DEPENDENT UPON THE VALUE OF RESISTANCES APPEARING AT A GAIN CONTROLLING JUNCTION, SAID COMPRISING A FIRST RESISTANCE MEANS, AT LEAST ONE PAIR OF SERIES CIRCUITS EACH COMPRISING A RESISTOR CONNECTED TO A DIODE MEANS CONNECTING SAID SERIES CIRCUITS IN PARALLEL WITH SAID FIRST RESISTANCE MEANS TO ESTABLISH A SECOND RESISTANCE VALUE, A SOURCE OF BIAS POTENTIAL CONNECTED IN COMMON TO SAID SERIES CIRCUITS AND HAVING A POLARITY POLED RELATIVE TO SAID DIODES FOR CONDUCTING CURRENT THERETHROUGH SWITCHING MEANS CONNECTED TO SAID BIAS SOURCE AND SELECTIVELY OPERATIVE FOR INTERRUPTING AND ESTABLISHING CURRENT FLOW IN SAID SERIES CIRCUITS, SAID SELECTIVELY ESTABLISHED AND INTERRUPTED CURRENT FLOW INTRODUCING CURRENT TRANSIENTS WITH EACH CHANGE IN CURRENT CONDITION IN SAID SERIES CIRCUITS, A FIRST WINDING CONNECTED IN SERIES BETWEEN GROUND AND SAID GAIN CONTROLLING JUNCTION, AND A SECOND WINDING CONNECTED IN PARALLEL ACROSS SAID FIRST RESISTANCE MEANS AND INDUCTIVELY COUPLED TO SAID FIRST WINDING FOR REFLECTING SAID FIRST RESISTANCE AND SAID SECOND RESISTANCE VALUE TO SAID FIRST WINDING, SAID SECOND WINDING FURTHER HAVING A GROUNDED CENTER TAP FOR ISOLATING SAID FIRST WINDING AND SAID AMPLIFIER FROM SAID CURRENT TRANSIENTS.