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Tunable operational transconductance amplifier with extremely high linearity over very large input range

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2 Author(s)
Wu, P. ; Dept. of Electr. & Comput. Eng., Portland State Univ., OR, USA ; Schaumann, R.

A simply fully-differential transconductor is presented that achieves, based on cancellation of first and higher order nonlinearities, +or-0.7% linearity error over a +or-6.4 V differential input range for +or-5 V power supplies. Common-mode input signals are cancelled at the output. The transconductance can be tuned at least by a factor 3 and f(-3dB) is 63 MHz for 10 mu m channel length.

Published in:

Electronics Letters  (Volume:27 ,  Issue: 14 )