Input stage improvement for current feedback amplifiers

Details Input stage improvement for current feedback amplifiers Input stage improvement for current feedback amplifiers

1994-05-18

1995-05-23

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

330292, H03F 326, H03F 114

Patent

active

054184959

ABSTRACT:
A current feedback amplifier having circuitry in its input stage for matching the error current created due to a parasitic capacitance (C.sub.IN) on the negative, or inverting input terminal (V.sub.IN-). Additional circuitry in the input stage subtracts the matching current from the error current created by C.sub.IN to cancel the error current due to C.sub.IN and thus eliminate the peaking of gain at high frequencies caused by C.sub.IN. In addition to cancellation of C.sub.IN errors, the subtraction process in the input stage enables cancellation of error current resulting from bias current common mode rejection (ICMR) as well as component dissimilarities created during processing.

REFERENCES:
patent: 5179355 (1993-01-01), Harvey
patent: 5229721 (1993-07-01), Stade

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