| 摘要 |
In order to facilitate bias adjustment in a single ended push-pull amplifier comprising first and second transistors connected in series between a power source and the ground, a circuit including a capacitor and load connected in series between the juncture of the first and second transistors and the ground, at least one circuit including of a plurality of resistors, one resistor being a variable one, connected in series between the power source and the ground so as to supply bias voltage to the first and second transistors, and an input transformer having first and second secondary windings so as to actuate upon receipt of signals the first and second transistors alternately; there is connected a DC blocking capacitor between the bias voltage supplying point included in the aforesaid resistor series circuit to the first transistor and the juncture of the first and second transistors, and voltage across the variable resistor included in the series circuit is supplied to the second transistor as bias voltage. The single variable resistor adjusts the proper operating condition.
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