A wide-band multipath CMOS OTA for high speed applications

Abstract

Abstract:A fast settling multipath CMOS OTA for high speed switched capacitor applications is presented here. With the basic topology similar to folded-cascode, bandwidth and DC gain of the OTA are enhanced by adding extra paths for signal from input to output. Designed circuit is simulated with HSPICE using level 49 parameters (BSIM 3v3) in 0.35 um standard CMOS technology. The DC gain achieved is 56.7 db and the Unity Gain Bandwidth (UGB) obtained is 1.15 GHz.