bsrivastava
Member level 2
question on diff amp
I am having conventional differential amplifier with pmos current mirror as load, nmos diff pair and nmos tail current. My Vcc in worst case goes down to 0.945 V (1.05 V typical). As my Vt drop is close to the same my Vcc (3xVt approx equal to 0.945) plus Vod (overdrive voltage), my current mirror, diff pair or nmos tail has to go out of saturation.
My question is, which one I can bear to be out of saturation and still I can get close to ideal diff amp performance, i.e. minimum offset, better gain, bandwidth, less propagation delay.
thanks
-Bharat
I am having conventional differential amplifier with pmos current mirror as load, nmos diff pair and nmos tail current. My Vcc in worst case goes down to 0.945 V (1.05 V typical). As my Vt drop is close to the same my Vcc (3xVt approx equal to 0.945) plus Vod (overdrive voltage), my current mirror, diff pair or nmos tail has to go out of saturation.
My question is, which one I can bear to be out of saturation and still I can get close to ideal diff amp performance, i.e. minimum offset, better gain, bandwidth, less propagation delay.
thanks
-Bharat