A rail-to-rail constant-gm CCII for Instrumentation Amplifier applications

We here present a current mode Instrumentation Amplifier (IA) based on second generation current conveyor (CCII) with complete input/output dynamic range (rail-to-rail) and constant-gm characteristics. The IA operates at 1.5 V supply with 177 μW power consumption, high-loop gain (115 dB) and high CMRR (105 dB). The proposed IA has been implemented by using a standard AMS 0.35-μm CMOS technology. SPICE simulations are also reported.