Analogue Electronics assignment

This project is focused on the design and simulation of a multi-stage amplifier using BJT (Bipolar Junction Transistor) circuits. The amplifier consists of three stages:

• Two Common-Emitter (CE) stages
• One Common-Collector (CC) stage

The goal was to achieve a mid-band gain of 38-42 dB, with specific frequency cut-off requirements. The design was simulated using LTSpice to validate its theoretical performance.

Why was it created?

• To study multi-stage amplifier design and the operation of BJTs.
• To analyze the impact of various transistor configurations on gain and frequency response.
• To practice using simulation tools like LTSpice to verify circuit performance.

How does it work?

DC Analysis

• Operating points for each transistor stage were calculated to ensure proper biasing.

AC Analysis

• The small signal model was used to determine the frequency response and gain of the amplifier.

Simulation & Results

• The amplifier design was tested under different operating conditions using LTSpice.
• Simulation results confirmed that the amplifier met the required mid-band gain and cut-off frequencies.