amarnath said:since when u are maintaining this transistor in saturation u are not going to allow the currents of the of the transistors in the differential arm of the differential amplifier
amarnath said:no the reason for the tail transistor to be in saturation is that,u are not going to allow the common mode signal to affect the output of the op amp,since when u are maintaining this transistor in saturation u are not going to allow the currents of the of the transistors in the differential arm of the differential amplifier.hope iam clear.
regards
amarnath
suria3 said:Hi,
When you bias your tail transistor in saturation, your total current that sinks at the tail won't depend on VDS when it change over temperature or process. Thus, your amplifier will operate linearly, meaning that your gain will be constant as the current is being constant when the tail switching takes place.
Suria3
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