A tunable floating-gate CMOS transconductor based on current multiplication

摘要

In this paper a novel transconductor based on floatinggate techniques that performs current multiplication for tuning ispresented. The multiplication is achieved using transistorsoperating in weak and moderate inversion together with floatingvoltage sources implemented conveniently by floating capacitors.Besides, a tuning scheme is proposed to set the transconductanceparameter accurately. The resulting circuit features compactness,low voltage operation, and rail-to-rail input range. Measurementand simulation results using a 0.5um CMOS technology arepresented to confirm all the circuits and strategies proposed.