Research PaperNo Access

A New Design of NCFF Compensated Operational Amplifier for Continuous-Time Delta Sigma Modulator

Suresh Gyan Vihar University, Jaipur, India

E-mail Address: kasturighosh@rediffmail.com

https://doi.org/10.1142/S0218126623502894Cited by:0 (Source: Crossref)

Abstract

A power-efficient second-order no-capacitor feedforward (NCFF) op-amp has been designed in 180nm CMOS process. To attain high gain and better common mode rejection, cross-coupled loading network has been used in each differential stage. The designed op-amp achieves over 40dB gain up to 400MHz and over 10dB open loop gain up to 4GHz with 0.87mW power consumption. It is suitable for application in continuous-time delta-sigma modulator (CT $Δ Σ$ $Δ Σ$ M) with sampling frequency in GHz range.

This paper was recommended by Regional Editor Giuseppe Ferri.

Keywords:

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