Design methodology of standard analog circuit block using EKV MOSFET model and validation using BSIM3v3 MOSFET model

Designing of an IC is an art which a designer masters by its experience of multiple simulation of the circuits and evaluating transistor sizes to meet contrasting objectives of gain-bandwidth product, power consumption, dynamic range non-linear distortion, etc. The designer adopt multi-pronged approach to meet its specification by examining the circuit by design intuition using analytical approach and then further optimizing by simulating circuit on simulator. The performance of the circuit is enhanced using optimization algorithm with multiple constraints but it require the circuit performance be modeled with mathematical expression. In this paper we use EKV2.6 model parameters which is extracted and optimized on different bins of BSIM3v3 model on 0.18μ technology to design standard analog building blocks like single stage common source amplifier, differential amplifier and OTA using g_m/lD ratio design methodology. Finally all the design are validated on HSPICE using BSIM3v3 MOSFET model with matching within limit of 10%. This capability of above work shows a complete procedure in the design for a standard specification of OTA.