skoda
Junior Member level 3
Hi,
guys I have problem with P_DIOD design, as you can see to set this device to strong inversion ( gmoverid near to 10) I choose W/L= 1/12, problem is that this p_diod have large vds=720mV a therefore less voltage left fo DIFF_PAIR which is going to triode and Gain of this OTA is going to hell.
So I can change W/L of P_DIOD to makes vds smaller than 720mV but there will be no in Strong inversion.But still vdsat of DIFFPAIR is 63mV which is not real value, so Vds(DIFFPAIR)=83mV is still small.
guys I have problem with P_DIOD design, as you can see to set this device to strong inversion ( gmoverid near to 10) I choose W/L= 1/12, problem is that this p_diod have large vds=720mV a therefore less voltage left fo DIFF_PAIR which is going to triode and Gain of this OTA is going to hell.
So I can change W/L of P_DIOD to makes vds smaller than 720mV but there will be no in Strong inversion.But still vdsat of DIFFPAIR is 63mV which is not real value, so Vds(DIFFPAIR)=83mV is still small.