Analog Electronics
Amplifiers
Practice questions from Amplifiers.
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IncorrectA simplified small-signal equivalent circuit of a BJT-based amplifier is given below.
The small-signal voltage gain in is _________.
and
Small-signal voltage gain,
Hence, option (A) is correct.
The identical MOSFETs and in the circuit given below are ideal and biased in the saturation region. and have a transconductance of 5 mS .
The input signals (in Volts) are:
The output signal (in Volts) is __________.
Given: MOSFETS and : Ideal, Saturation region
DC Analysis:
AC Analysis-
DC Voltage Source = Short-Circuited
DC Current Source = Open-Circuited
In MOSFET based differential amplifier with two input and ,
If polarity of is consider such that , then is non-inverting terminal and is inverting terminal.
As the circuit is symmetrical,
And,
Thus,
Hence, option (d) is correct.