Fully differential voltage controlled operational transconductan

Details Fully differential voltage controlled operational transconductan Fully differential voltage controlled operational transconductan

1996-05-15

1998-04-07

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330258, H03F 345

Patent

active

057368996

ABSTRACT:
A differential input/differential output OTA includes two resistively degenerated matched pairs of bipolar transistors; one pair provides differential input, the other provides differential output and feedback to the first pair, thus canceling AC distortions. In voltage controlled filter applications that employ the new OTA, control feedthrough is significantly reduced when compared to similar low pass filters which employ conventional OTAs.

REFERENCES:
patent: 3786362 (1974-01-01), Marsh et al.
patent: 5436594 (1995-07-01), Pace et al.
"LM13600/CL13600A Dual Operational Transconductance Amplifiers with Linearizing Diodes and Buffers", National Semiconductor Linear Design Databook 1, No. 400041, Rev. 1, National Semiconductor Corporation, Santa Clara, California, pp. 2-516 and 2-533.

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