Class b amplifier circuit

Claim 1

AN ELECTRICAL SIGNAL AMPLIFYING CIRCUIT COMPRISING: A PAIR OF OUTPUT DEVICES EACH HAVING OUTPUT ELECTRODES ARPAIR OF OUTPUT DEVICES EACH HAVING OUTPUT ELECTRODES ARRANGED IN A QUASI-COMPLEMENTARY CONFIGURATION SO THAT THE RESPECTIVE DEVICES AMPLIFY INPUT SIGNALS OF OPPOSITE POLARITY RESPECTIVELY, MEANS CONNECTING SELECTED OUTPUT ELECTRODES OF SAID DEVICES TOGETHER IN A COMMON OUTPUT CONNECTION, A LOAD CONNECTED TO SAID COMMON OUTPUT CONNECTION, EACH OF SAID DEVICES HAVING AN INPUT ELECTRODE AND A THIRD ELECTRODE, A TRANSFORMER HAVING PRIMARY AND SECONDARY WINDINGS, MEANS CONNECTING THE PRIMARY WINDING OF SAID TRANSFORMER DIRECTLY BETWEEN THE INPUT ELECTRODE OF A FIRST ONE OF SAID DEVICES AND THE COMMON OUTPUT CONNECTION TO PROVIDE A PATH THEREBETWEEN HAVING A RESISTANCE EQUAL TO THAT OF SAID PRIMARY WINDING, MEANS CONNECTING THE SECONDARY WINDING OF SAID TRANSFORMER DIRECTLY BETWEEN THE INTPUT ELECTRODE AND THIRD ELECTRODE OF THE SECOND OF SAID DEVICES TO PROVIDE A CURRENT PATH THEREBETWEEN HAVING A RESISTANCE EQUAL TO THAT OF SAID SECONDARY WINDING, BIAS MEANS COUPLED BETWEEN SAID THIRD ELECTRODES OF SAID FIRST AND SECOND ONES OF SAID OUTPUT DEVICES, AND MEANS DIRECTLY COUPLED BY PURELY RESISTIVE CIRCUIT PATHS TO THE INPUT ELECTRODE OF SAID FIRST DEVICE AND TO SAID PRIMARY WINDING FOR APPLYING INFORMATION SIGNALS THERETO IN ORDER TO CONTROL BOTH OF SAID DEVICES.