Differential amplifier circuit having non-linerity cancellation

Details Differential amplifier circuit having non-linerity cancellation Differential amplifier circuit having non-linerity cancellation

1998-01-15

1999-12-07

Mottola, Steven J.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330254, H03F 345

Patent

active

05999049&

ABSTRACT:
A differential amplifier circuit comprises a first differential transistor circuit, a grounded base transistor circuit and a second differential transistor circuit. A pair of transistors of the second differential transistor each produces a current based on an emitter voltage of each of a pair of transistors of the grounded base transistor circuit for cancelling non-linear components of transistors of the first differential transistor circuit. The currents produced by the second differential transistor circuit are each cross-added to an alternating current component of each of the first differential transistor circuit at a collector of each of the pair of transistors of the grounded base transistor circuit. Non-linear components of the first differential transistor circuit are thus cancelled out.

REFERENCES:
patent: 4292597 (1981-09-01), Niimura et al.
patent: 4820997 (1989-04-01), Sano et al.
patent: 4904952 (1990-02-01), Tanimoto
patent: 5821810 (1998-10-01), Swart et al.

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