Transistorized amplifier with coaxial line type tank circuit and compensating circuit for neutralizing transistor susceptance

Claim 1

IN A CIRCUIT ARRANGEMENT COMPRISING A TUNABLE TRANSISTOR AMPLIFIER AND A COAXIAL LINE TYPE TANK CIRCUIT CONNECTED TO THE OUTPUT OF THE AMPLIFIER, A COMPENSATING CIRCUIT FOR NEUTRALIZING THE SUSCEPTANCE OF THE TRANSISTOR, SAID CIRCUIT BEING A SERIES CIRCUIT WHICH IS COMPOSED OF A CAPACITANCE AND AN INDUCATANCE AND IS COUPLED INDUCTIVELY IN PARALLEL WITH THE SUSCEPTANCE OF THE TRANSISTOR, A PORTION OF SAID INDUCTANCE CONSISTUTING A COUPLING LOOP MEANS WHICH EXTENDS INTO THE TANK CIRCUIT NEAR THE CURRENT MAXIMUM THEREOF FOR COUPLING OUT A VOLTAGE WHOSE PHASE IS OPPOSITE TO THE PHASE OF THE VOLTAGE OF THE OUTER CONDUCTOR OF THE TANK CIRCUIT IN CONSEQUENCE OF WHICH THERE IS APPLIED TO THE TRANSISTOR SUSCEPTANCE A VOLTAGE WHICH IS OF A PHASE OPPOSITE TO THAT OF THE VOLTAGE APPEARING ACROSS THE SUSCEPTANCE, THE SIZE OF SAID COUPLING LOOP MEANS BEING SMALL AS COMPARED TO THE SHORTEST WAVELENGTH OF THE TUNING RANGE OF THE AMPLIFIER, WHEREBY THE AMPLIFIER IS CONTINUALLY TUNABLE, AT ULTRA HIGH FREQEUENCIES, THROUGH A WIDE RANGE.