Hardware realization and testing of multistage OTA buffer amplifier for heavy resistive load

Experimental study of operational transconductance amplifier (OTA) buffer amplifier configurations capable of driving resistive load <; 100 Ω is presented in this paper. The OTA buffer configurations are designed using 0.18 μm SCL technology library and fabricated in semiconductor lab (SCL), Chandigarh. The experimental results show a good agreement with the theoretical and simulation results. A gain tuning of 0.5 V/V to 5 V/V is achieved with R
_L
equal to 50 Ω, maximum output swing of 1 V
_pp
with a supply voltage of ± 0.9 V.