give me idea to solve voltage bias telescopic opamp

Discussion in 'Homework Help' started by tel_amp lady, Aug 22, 2009.

  1. tel_amp lady

    Thread Starter New Member

    Aug 20, 2009
    3
    0
    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 region...is 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 : http://images.elektroda.net/20_1250586782.jpg

    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
    V_B1=V_DD-V_GS7
    The bias voltage for V_B2
    V_(B2(max))=V_DD-V_GS5-V_0D7
    The bias voltage for V_B3
    V_(B3(min))=V_GS3+V_OD1+V_0D9
     
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