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Current-mode pseudo-exponential-control variable-gain amplifier using fourth-order Taylor's series approximation

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2 Author(s)
Arthansiri, T. ; Dept. of Electron., KMITL, Bangkok, Thailand ; Kasemsuwan, V.

A new current-mode pseudo exponential-control variable-gain amplifier (VGA) using CMOS technology is proposed. The technique is based on the fourth-order Taylor's series approximation. The VGA exhibits a linear-dB controllable output range of 30 dB with maximum error less than 0.5 dB.

Published in:

Electronics Letters  (Volume:42 ,  Issue: 7 )