Feedback arrangement

Details Feedback arrangement Feedback arrangement

1979-02-22

1981-09-01

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330260, 330265, 330293, H03F 134, H03F 326

Patent

active

042874777

ABSTRACT:
An arrangement to provide feedback to amplifier systems incorporating an inductive laod. A low value error-sensing resistor is incorporated in conjunction with one or more transistors to provide a feedback correction signal to an amplifier which corrects for distortion caused by both the amplifier and the inductive load. A first embodiment providing a single-ended amplifier system incorporates an error-sensing resistor in series with a transistor, an inductive load and a bias resistor. A negative feedback error signal is provided to the amplifier from a point between the error-sensing resistor and the bias resistor. A second embodiment additionally includes a transformer to isolate the load. The third embodiment provides push-pull amplifier configurations. The third embodiment incorporates two complementary transistors to drive an inductive load. A pick-off arrangement including two capacitors and an error-sensing resistor provides negative feedback to the amplifier.

REFERENCES:
patent: 2740850 (1956-04-01), Massaut

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