Darlington differential amplifier

Details Darlington differential amplifier Darlington differential amplifier

2006-10-17

2006-10-17

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S283000

Reexamination Certificate

active

07123091

ABSTRACT:
A Darlington differential amplifier includes a differential pair of Darlington transistors, with each pair including a first transistor and a second transistor connected in cascade to the first transistor. The first transistor is controlled by an externally generated voltage and drives the second transistor. The first and second transistors each include first and second conducting terminals, with the first conducting terminals being connected together and forming an output node of the amplifier. A first degeneration impedance is connected between the second conduction terminals of the second transistors in the pair of Darlington transistors. A second degeneration impedance is connected between the second conduction terminals of the first transistors in the pair of Darlington transistors for reducing harmonic distortion of the amplifier.

REFERENCES:
patent: 3628168 (1971-12-01), Kobayashi
patent: 4779057 (1988-10-01), Woo
patent: 4890067 (1989-12-01), Lamb
patent: 5461342 (1995-10-01), Crabtree

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