A tunable floating-gate CMOS transconductor based on current multiplication
2009
In this paper a novel transconductor based on floating gate techniques that performs current multiplication for tuning is presented. The multiplication is achieved using transistors operating in weak and moderate inversion together with floating voltage sources implemented conveniently by floating capacitors. Besides, a tuning scheme is proposed to set the transconductance parameter accurately. The resulting circuit features compactness, low voltage operation, and rail-to-rail input range. Measurement and simulation results using a 0.5um CMOS technology are presented to confirm all the circuits and strategies proposed.
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