give me idea to solve voltage bias telescopic opamp

Thread Starter

tel_amp lady

Joined Aug 20, 2009
hye all...
i hv problem with designing telescopic opamp..i need to design d transistor to be all in saturation,but currently only transistor M11 and M5 and M6 are enter saturation region and all in linear there any other way i can solve this problem..coz all d calculation i do is from behad ravavi book...but when i implement it, it not d same...i attached the calculation for voltage bias and the circuit design

circuit design :

The minimum allowable input common mode level equation
VIN(min)= V_GS1+V_OD9= V_TH1+V_OD1+V_OD9
The bias voltage for V_B1
The bias voltage for V_B2
The bias voltage for V_B3