FIELD: electricity.
SUBSTANCE: two-step amplifier comprises complementary NPN and PNP transistors whose emitters are combined and form the output of the amplifier, a bipolar power supply, a transformer, one end of the primary coil of which forms the signal input of the amplifier and the other end and the midpoint of the power supply are connected to the common bus of the amplifier; complementary N and P field-effect transistors; the source of the N field-effect transistor is connected to the base of the NPN transistor; the source of the P field-effect transistor is connected to the base of the PNP transistor; the drain of the N field-effect transistor and the collector of the NPN transistor are connected to the positive voltage output of the bipolar power supply, and the drain of the P field-effect transistor and the collector of the PNP transistor are connected to the negative voltage output of the bipolar power supply; transistors of the output stage of the amplifiers are mounted on a common heatsink.
EFFECT: more accurate reproduction of the input signal.
7 cl, 6 dwg
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