ENGINEERING TRIPOS PART IB - 2012/2013
PAPER 5 - ELECTRICAL ENGINEERING (1)
Linear Circuits and Devices
Leader: Dr. R. A. McMahon
Timing: Weeks 1-6 Michaelmas term
Structure: 10 lectures, 2 lectures/week weeks 1-4, 1 lecture/week weeks 5 and 6
The aims of the course are to:
- Understand the operation of
the bipolar transistor as a linear amplifier.
- Understand the principle of
negative feedback and the effects of its application.
- Understand the concept and
practical realization of an operational amplifier and be familiar with the
use of operational amplifiers in feedback circuits.
- Appreciate the special
considerations involved in output stages which are required to supply
- Understand how oscillators can be realized using linear circuits and other means
As specific objectives students should:
- Know how to bias the device
to a suitable operating point for linear amplification and how to
construct a load line through the operating point.
- Be familiar with the small
signal equivalent circuit for the bipolar transistor and be able to use it
to determine gain, bandwidth and input and output impedances for the
common emitter and emitter follower (common collector) circuit
Operational Amplifiers and Negative Feedback
- Know how to apply negative
feedback and calculate the effects on gain, bandwidth and input and output
- Be able to analyse the
long-tailed pair circuit and to understand its importance in practical
- Be able to relate the
departures from ideality of practical operational amplifiers to the use of
the long-tailed pair circuit.
- Know how to use operational
amplifiers to make simple circuit elements, namely difference amplifiers,
adders, integrators and differentiators.
- Be able to set up a basic
complementary emitter follower, or source follower, output stage.
- Know the conditions for
class A, AB and B operation and the effect on efficiency and linearity.
- Be able to configure a simple oscillator using a linear amplifier and a feedback network.
- Understand how a hysteresis switch and a timing network can be used to make a relaxation oscillator.
SYLLABUS (Book References)
1. Bipolar Transistor - Device & Circuits (2L) (1)
76-83 (2) 368-375
- 1.1. Biassing & load
lines. (1) 83-91 (2) 560-565
- 1.2. Small signal
equivalent circuit. (1) 91-100 (2) 600-601
- 1.3. Emitter (source)
follower. (1) 100-104, 60-62 (2) 642-644
- 1.4. Input & output
impedance of CE and CC configurations. (1) 96-98, 100-104
2. Operational Amplifier Circuits (5L)
- 2.1. Revision of
operational amplifiers (1) 114-128, 526 (2) 518-520
- 2.2. Negative feedback
theory, gain = A/1+AB. (1) 164-181 (2) 636-641
- 2.3. Stabilisation of
Gain, reducing distortion.
- 2.4. Improvement of
bandwidth, input & output resistances.
- 2.5. Instability, AB = -1,
- 2.6. Voltage follower,
adding, integrating & differentiating amplifiers. (1) 128-132 (2)
- 2.7. Input & output
impedances with & without feedback. (1) 121-126 (2) 528-529
- 2.8. Common mode rejection
ratio (long-tailed pair op-amp input stage). (1) 140-146 (2) 536-538
- 2.9. Input bias and offset
currents, offset voltage, gain/bandwidth, slewing rate. (1) 146-151 (2)
3. Oscillators (1.5L)
3.1. Oscillators using linear circuits. (2) 574-576
- 3.2. Relaxation oscillators
4. Power Amplifier Stages (1.5L)
- 4.1. Emitter or source
follower, power output and efficiency. (2) 574-576
- 4.2. Complementary
transistor output stage.
- 4.3. Classes A, AB and B.
(1) AHMED, H. & SPREADBURY, P.J. ANALOGUE AND DIGITAL ELECTRONICS FOR ENGINEERS
(2) SMITH, R.J. & DORF, R.C. CIRCUITS, DEVICES AND SYSTEMS
Please see the Booklist for Part IB Courses for references for this module.
Last updated: May 2012