High frequency differential amplifier with adjustable damping fa

Details High frequency differential amplifier with adjustable damping fa High frequency differential amplifier with adjustable damping fa

1983-02-07

1985-07-09

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330261, 330311, H03F 345

Patent

active

045285152

ABSTRACT:
A high-frequency differential amplifier is provided with a pair of buffer input stages, each having transistors the transconductance of which may be varied by varying a current source connected thereto. Since transistor frequency response and step response are dependent upon transconductance, bandwidth and damping factor of the step response may be varied for optimum performance without degrading gain and dynamic range characteristic of the differential amplifier. One useful application of the differential amplifier of the present invention is as an error amplifier in a cascomp amplifier circuit, such that the apparent damping factor of the step response of the cascomp circuit may be adjusted.

REFERENCES:
De Kok, et al., "Monolithic Instrumentation Amplifier", Electrical Engring, vol. 3, N. 3, Jul. 1978, pp. 225-236.

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