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Unit information: Electronics 2 in 2018/19

Please note: It is possible that the information shown for future academic years may change due to developments in the relevant academic field. Optional unit availability varies depending on both staffing and student choice.

Unit name Electronics 2
Unit code EENG26000
Credit points 10
Level of study I/5
Teaching block(s) Teaching Block 1 (weeks 1 - 12)
Unit director Professor. Cryan
Open unit status Not open




School/department Department of Electrical & Electronic Engineering
Faculty Faculty of Engineering


This unit deals with a broad and essential range of topics in analogue electronics at an intermediate level. It covers the design of circuits using MOSFET and BJT devices, the effects of feedback, the design of high power amplifiers, and the operation of oscillator circuits.


Bipolar Junction Transistors (BJT): BJT Operation, npn and pnp transistors in active mode, analysis of transistor circuit at DC, BJT as an amplifier, small signal equivalent circuit model (the hybrid-pi model, the T model and graphical analysis), BJT discrete circuit design, basic BJT amplifier configurations.

MOS Field Effect Transistors (MOSFET): MOSFET as an amplifier, small signal model, MOSFET discrete circuit design, single stage MOSFET amplifiers, multi-stage amplifiers (differential pair current mirror and cascode).

Feedback: Open and closed loop gain, negative feedback (effect on gain and bandwidth), basic feedback topologies (voltage, current, transconductance and transresistance), analysis of gain, input and output resistance of series-shunt, series-series, shunt-shunt and shunt-series feedback amplifiers.

Output and Power Amplifiers: Classification of output stages, class A, B and AB output stages, biasing analysis of class AB stage.

Oscillators: Principles of sinusoidal oscillators, RC oscillator circuits (Wien-Bridge and Phase shift oscillators), LC tuned oscillator (Colpitts).

Intended learning outcomes

On successful completion of this unit, students should be able to:

  1. describe the operation of a BJT and carry out the associated DC circuit design.
  2. apply small-signal models such as the hybrid-pi and the T-model to analyse the performance of single stage circuits.
  3. describe the operation of the MOSFET and carry out associated discrete DC circuit design.
  4. describe the basic concepts of MOSFET-based multi-stage amplifiers such as the differential pair, and cascode.
  5. describe the different amplifier output stages (A, B and AB) and be able to carry out basic biassing of a class AB stage.
  6. describe the general principles of sinusoidal oscillators and be able to analyse and design simple oscillators based on RC and LC circuits.

Teaching details

Lectures and Laboratory classes

Assessment Details

Full report on Large Signal Amplifier experiment, 15% (ILOs 1, 5)

Quiz on Oscillator laboratory, 5% (ILO 6)

Exam, 2 hours, 80% (All ILOs)

Reading and References

Sedra & Smith, "Microelectronic circuits", Oxford