Abstract:
This paper describes the Gain boost class–C inverter circuit, which is used in place of OTA (Operational Trans-conductance Amplifier) block in ∑Δ modulator .The gain boost class-C inverter behaves as a low voltage, subthreshold amplifier and boosts its DC gain for the high precision requirement. First a traditional cascade class-C inverter is presented, another inverter circuit present in this paper is "Gain boost class-C inverter". It is implemented in 50nm CMOS technology and simulation is done using the LTSpice simulation tool.
Keywords: CMOS, cascode inverter, LT-Spice, gain boost class-C inverter.