Design and Analysisi of Widw Swing Folded-Cascode OTA

This paper deals withthe design of Wide Swing Folded-Cascode OTA. An optimum OTA topology is done in order to optimize MOS transistor sizing. Also, the design of Folded Cascode OTA, which works for frequencies that lead to a baseband circuit design for RF application, is based on transistor sizing methodology. This paper deals an effective OTA design for good PSRR, low-voltage, low-power and wide output voltage swing operational amplifier. Trying to combine an alternative technique of voltage driven-Bulk CMOS with a folded cascade OTA design to improve PSRR and output voltage swing in that circuit by reducing its supply voltage and power consumption. The simulation of the cascode and folded cascode circuits is done using TSPICE simulation tool and the LEVEL–2, 180nm parameters are used. A complete analysis of the circuit is presented in this paper which shows how this circuit leads to a high gain and resistance at output. A comparison between the cascode and Folded-Cascode op amps is described. We have also described their simulated and calculated results comparison individually. The Wide Swing Folded-Cascode OTA is designed using 180 nm CMOS technology.