Report

JOMO KENYATTA UNIVERSITY OF AGRICULTURE AND TECHNOLOGY.

DEPARTMENT: ELECTRICAL, ELECTRONICS AND INFORMATION ENGINEERING

COURSE: ELECTRICAL AND ELECTRONIC ENGINEERING

UNIT CODE: EEE 2210

UNIT: ANALOGUE ELECTRONICS II

TITLE ASSIGNMENT- AMPLIFIER DESIGNING

LECTURER: MR MULLI

DATE: 28/03/2014

NAME REG NO. SIGNATURE

MUNALA ERASTUS M. EN271-2019/2012

GIDEON EDWIN M. EN272-3056/2012

MUGWERU WASHINGTON EN272-1947/2012

BURGEI MARK EN272-3004/2012

Abstract

Common-emitter (CE) circuits are the basic and important amplifiers in analog electronics. Theoretical analysis of the CE circuit is carried out to calculate the Q-point, the voltage gain, the input impedance and the output impedance. The CE circuit is simulated to make the analysis of DC operating point analysis, DC sweep analysis, AC analysis and amplitude of output voltage. The simulation results are consistent with the theoretical calculation. It is concluded that a virtual simulation on electronic circuits with Multisim 11.0 can be easily built and test without the restriction of hardware devices. Multisim 10 provides students with a good experimental platform, and makes them convenient to do experiments, demonstrate and analyze circuits in the process of analog electronics teaching.

1. INTRODUCTION

1.1 Theory of the working of a Common Emitter Amplifier

One of the most popular single-transistor BJT amplifier designs is the common emitter (CE) amplifier design. The CE amplifier is relatively simple to bias, delivers a high voltage gain.

There are two parts to transistor amplifier design.

1) DC biasing

2) AC amplifier design.

To ensure linear amplification by a transistor amplifier, the amplifier is normally designed so that under...