Complementary output amplifier with an input for offsetting volt

Details Complementary output amplifier with an input for offsetting volt Complementary output amplifier with an input for offsetting volt

1984-07-16

1985-09-24

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330261, 330252, H03F 345

Patent

active

045435383

ABSTRACT:
An amplifier circuit having first, second and third inputs and first and second input impedance elements connected respectively to the first and second inputs, a first differential stage connected between the first and second input impedance elements, first and second output stages connected to the differential stage outputs, the first and second output stages produce complementary voltage output signals on respective first and second outputs, first and second cross-coupled differential feedback loops linking the first output to the second input of the first differential stage and the second output to the first input of the first differential stage, the first and second outputs are linked to each other by a voltage divider circuit the midpoint of which is connected to one input of a second differential stage, the third input being the other input of the second differential stage, the output of the second differential amplifier causing a change in a current repeater circuit which in turn causes a change in the first and second output stages, and the changes in the output stages operating to cancel inphase noise and insert common mode portions into the complementary output signals.

REFERENCES:
patent: Re27351 (1972-05-01), McGraw et al.
patent: 3260947 (1966-07-01), Dorsman
patent: 3566298 (1971-02-01), Stevens
patent: 3938055 (1976-02-01), Buhler
patent: 4088961 (1978-05-01), Ashley

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