Class AB push-pull FET amplifiers

Details Class AB push-pull FET amplifiers Class AB push-pull FET amplifiers

1979-12-28

1981-10-20

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

330265, 330267, H03F 330

Patent

active

042963826

ABSTRACT:
The output stage of a quasi-linear amplifier employs a p-channel and an n-channel FET with their sources at relatively positive and relatively negative operating voltage rails to drive a load from their drain-to-drain connection, so that despite their being enhancement types full rail-to-rail output voltage capability can be obtained without need for bootstrapping. Input signal voltage and direct-coupled feedback voltage are applied to the gate-to-gate connection of p-channel and n-channel source-followers with their respective sources direct-coupled to the gate of the p-channel FET in the output stage and to the gate of the n-channel FET in the output stage, respectively, and with their respective drains connected to the relatively positive operating voltage rail and to the relatively negative operating voltage rail, respectively, in a representative driver stage.

REFERENCES:
patent: 3887881 (1975-06-01), Hoffmann
patent: 4031481 (1977-06-01), Yoshida
patent: 4038607 (1977-07-01), Schade, Jr.
patent: 4068090 (1978-01-01), Komatsu et al.

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