NZQA registered unit standard
20715 version 2
Page 1 of 5
Title
Demonstrate and apply knowledge of analogue electronics for
electronics technicians
Level
4
Purpose
Credits
12
This unit standard covers analogue electronics principles for
electronics technicians.
People credited with this unit standard are able to:
–
demonstrate knowledge of small signal Class A amplifier
circuits using bipolar and field effect transistors;
–
demonstrate knowledge of emitter follower or source
follower amplifier circuits;
–
demonstrate knowledge of power amplifiers;
–
demonstrate knowledge of differential amplifiers and
associated circuits;
–
demonstrate knowledge of feedback in electronic circuits;
–
demonstrate knowledge of sine wave oscillators;
–
demonstrate knowledge of filter concepts; and
–
apply analogue electronics principles.
Classification
Electronic Engineering > Core Electronics
Available grade
Achieved
Explanatory notes
1
This unit standard has been developed for learning and assessment off-job.
2
References
Health and Safety in Employment Act 1992 and associated regulations;
and all subsequent amendments and replacements.
3
Definitions
CR – capacitance and resistance.
Enterprise practice – those practices and procedures that have been promulgated by
the company or enterprise for use by their employees.
Industry practice – those practices that competent practitioners within the industry
recognise as current industry best practice.
MOSFET – metal oxide field effect transistor.
4
Range
a Electrical, radiation, and workshop or laboratory safety practices are to be
observed at all times.
b All measurements are to be expressed in Système Internationale (SI) units and
multipliers.
ElectroTechnology Industry Training Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
20715 version 2
Page 2 of 5
c Candidates are expected to have memorised and to be able to use the following
formula:
AOL
ACL 
.
1   . AOL
d Use of non-programmable calculators is permitted during assessments.
e All activities and evidence presented for all outcomes and evidence requirements
in this unit standard must be in accordance with legislation, policies, procedures,
ethical codes, Standards, applicable site and enterprise practice, and industry
practice; and, where appropriate, manufacturers’ instructions, specifications, and
data sheets.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of small signal Class A amplifier circuits using bipolar and field
effect transistors.
Evidence requirements
1.1
Resistor values are calculated to select an operating point for linear operation in
Class A.
Range
1.2
common emitter 4 resistor biasing, common source MOSFET
biasing.
Small signal parameters for amplifier circuits are determined by calculation.
Range
circuits – common emitter, common source;
parameters – input and output impedance, voltage gain, current
gain, power gain.
1.3
Capacitive and transformer coupling between amplifier stages are explained,
with reference to circuit sketches and frequency effects.
1.4
The effect on gain and frequency response of the emitter or source by-pass
capacitor is explained.
Outcome 2
Demonstrate knowledge of emitter follower or source follower amplifier circuits.
Evidence requirements
2.1
Basic amplifier circuit is sketched.
2.2
Advantages and disadvantages compared to common emitter or common
source circuits are stated.
2.3
Voltage gain and input and output impedances are calculated.
ElectroTechnology Industry Training Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
20715 version 2
Page 3 of 5
Outcome 3
Demonstrate knowledge of power amplifiers.
Range
Classes A, B (push-pull and complementary pair), AB, C, D.
Evidence requirements
3.1
Amplifier class is determined by inspection of given circuit diagrams.
3.2
Given circuit diagrams, the classes of amplifiers and the circuit operation of
each is explained with reference to load line and operating point, and sketches
of input and output waveforms are drawn.
3.3
Features of each class of amplifier are identified and compared.
Outcome 4
Demonstrate knowledge of differential amplifiers and associated circuits.
Evidence requirements
4.1
The characteristic features of differential amplifiers are identified.
4.2
The circuit operation of a discrete component differential amplifier is explained
with reference to differential gain, common mode rejection, and the purpose of
each component.
4.3
The characteristics and operation of constant current source and current mirror
circuits are explained, and the reasons for their use in conjunction with
differential amplifiers are stated.
Outcome 5
Demonstrate knowledge of feedback in electronic circuits.
Evidence requirements
5.1
The concept and purpose of negative and positive feedback are explained.
5.2
The terms open loop, closed loop, feedback fraction, and loop gain are
AOL
explained, and the feedback formula ACL 
is described and applied.
1   . AOL
5.3
Methods of applying negative feedback are described using block diagrams,
and are identified in operational amplifier circuits.
Range
methods – voltage series, current series, voltage shunt, current
shunt;
circuits – voltage shunt inverting op-amp circuit, voltage series
non-inverting op-amp circuit.
ElectroTechnology Industry Training Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
5.4
The effect of negative feedback on amplifier parameters is explained.
Range
5.5
20715 version 2
Page 4 of 5
parameters – gain, bandwidth, input and output impedance,
distortion.
The need for stability in an amplifier is explained, and the conditions for stability
are stated.
Outcome 6
Demonstrate knowledge of sine wave oscillators.
Range
oscillators may include – Hartley, Colpitts, Pierce, CR phase shift, variable
capacitance tuned, Wien bridge.
Evidence of two oscillators is required.
Evidence requirements
6.1
The type of oscillator and the frequency determining components are identified
by inspection of a given circuit diagram.
Outcome 7
Demonstrate knowledge of filter concepts.
Evidence requirements
7.1
Filter types are identified and their Bode plots sketched.
Range
7.2
Cut-off frequencies are calculated for simple filters.
Range
7.3
filter types – band pass, band stop, low pass, high pass.
two calculations.
Given a circuit diagram, the operation of a simple passive bass and treble tone
control circuit is explained and the component block identified.
Range
component blocks – treble boost, treble cut, bass boost, bass cut.
Outcome 8
Apply analogue electronics principles.
Range
application must relate to the preceding outcomes and may include but is not
limited to – circuit construction, experiment, fault finding, or project.
Evidence requirements
8.1
The application demonstrates use of instruments, tests, and experimental
procedure.
ElectroTechnology Industry Training Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
20715 version 2
Page 5 of 5
8.2
The application demonstrates analysis of measurements and observations.
8.3
Purpose, method, observations, measurements, and conclusions are recorded
in accordance with a given format.
Planned review date
31 December 2016
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
26 July 2004
31 December 2012
Review
2
21 July 2011
N/A
Consent and Moderation Requirements (CMR) reference
0003
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA,
before they can report credits from assessment against unit standards or deliver courses
of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies
to this standard are outlined in the Consent and Moderation Requirements (CMRs). The
CMR also includes useful information about special requirements for organisations wishing
to develop education and training programmes, such as minimum qualifications for tutors
and assessors, and special resource requirements.
Comments on this unit standard
Please contact the ElectroTechnology Industry Training Organisation
reviewcomments@etito.co.nz if you wish to suggest changes to the content of this unit
standard.
ElectroTechnology Industry Training Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016