Output stage for power amplifiers

Details Output stage for power amplifiers Output stage for power amplifiers

1984-07-24

1986-03-11

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

330263, 330267, H03F 326

Patent

active

045756864

ABSTRACT:
The output stage for power amplifiers, in particular of the minimum drop, low tension type, is intended for use with apparatus which do not require a high output current, which output stage can operate at a lower minimum voltage supply than comparable known stages. The output stage comprises upper and lower sections interposed between a power supply line and a ground line, each section including transistors across which voltage drops (V.sub.CE sat, V.sub.BE) appear and forming current sources for each section, diodes, and at least one current mirror circuit of the multiplying type adapted to determine as a first approximation the current gain of each section. The minimum voltage drop between the power supply line and ground line, as computed for any electric line connecting the power supply line and ground line, never exceeds the value of V.sub.BE +2V.sub.CE sat.

REFERENCES:
patent: 4394625 (1983-07-01), Sakai

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