University of Rhode Island Department of Electrical and Computer Engineering ELE541 Electronic Testing II

Bipolar Parameters   npn pnp Units Is 6E-17 7E-16 Amps VAF 325 90 Volts beta 100 75

MOS Parameters   NMOS PMOS Units KP 30E-6 10E-6 Amps/V2 Vth 2 -1.25 Volts Lambda 0.02 0.02 V-1

Vt = KT/q = 0.0257 Volts at room temperature.

1.     Design a 50uA Widlar current source.