## Description

• Use SPICE to simulate the amplifier in Fig. 1 at a frequency of 1 kHz, and determine the differential-mode gain, common-mode gain, CMRR, and differential-mode

and common- mode input resistances. (b) Apply a 250-mV, 1-kHz sine wave as an

input signal and plot the output signals using SPICE transient analysis. Use the

SPICE distortion analysis capability to find the harmonic distortion in the output.

Figure 1: Schematic diagram of a quite interesting circuit

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• What are the Q-points for the transistors in the amplifier in Fig. 2 if VCC = 18 V, VEE

=18V, REE =47kΩ,RC =100kΩ and βF = 100? (b) What are the differential- mode

gain, common-mode gain, CMRR, and differential-mode and common-mode input and

output resistances?

Figure 2: Differential Amplifiers

Reports will require to include a mathematical analysis and the numerical analysis o

simulation in Spice.

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