Two stage push-pull MOSFET power amplifier

Amplifiers – With semiconductor amplifying device – Including push-pull amplifier

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330298, H03F 330

Patent

active

047976306

ABSTRACT:
A power amplifier includes an output stage comprising a pair of complementary MOSFET power transistors connected in push-pull fashion between the positive and negative poles of a split DC power supply, with the sources of the transistors connected together to ground. The input stage includes another pair of complementary MOSFET driver transistors having their gates connected together to the input signal. The drain signal of each of the driver transistors is resistor coupled to the gate of one of the power transistors, and biased so that the driver turns off as the power transistors turns on. The amplifier output signal is taken between the common point of the split DC power supply and ground.

REFERENCES:
patent: 3042875 (1962-07-01), Higginbutham
patent: 4159450 (1979-06-01), Hoover
patent: 4464634 (1984-08-01), Velazquez
patent: 4630164 (1986-12-01), Olsson
Rule, "The `Winton` Stereo Amplifier", Practical Wireless, Mar. 1979, pp. 39-47.

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