Design and Analysis of CMOS Telescopic Operational Transconductance Amplifier for 0.35 micro Technology

Designing high performance analog circuits is becoming increasingly challenging with the persistent trend toward reduced supply voltages. At large supply voltages, there is a trade-off among speed, power and gain, amongst other performance parameters. Often these parameters present contradictory choices for the op-amp architectures. In this paper telescopic OTA is designed for 0.35& mu; m technology with the help of P-spice Orcad simulator. This designed telescopic OTA achieved gain 40db, phase margin of 70degree, CMRR 75db, which are the basic performance parameters of the OTA.