Page 555 - SUBSEC October 2017_Neat

UNIT 2
MODULE 2: A C THEORY AND ELECTRONICS (cont’d)

SPECIFIC OBJECTIVES EXPLANATORY NOTES SUGGESTED PRACTICAL
ACTIVITIES

3. Transducers

Students should be able to:

3.1. explain the use of the Used if necessary in a Demonstrate using the
light-dependent resistor potential divider or in a named devices to show
(LDR), the thermistor and the Wheatstone bridge circuit. their characteristics.
microphone as input devices
for electronic circuits; and,

3.2. describe the operation of the Include use of protective
light-emitting diode (LED), resistor for the LED.
the buzzer and the relay as
output devices.

4. Operational Amplifiers

Students should be able to:

4.1. describe the properties of Infinite input impedance,
the ideal operational infinite open loop gain, zero
amplifier; output impedance.

4.2. compare the properties of a
real operational amplifier
with the ideal operational
amplifier;

4.3. use the operational For example, converting Perform experiment to
amplifier as a sine wave to square wave, demonstrate the operation
comparator; turning on an alarm when of an op-amp comparator.
the temperature exceeds a
fixed value.

4.4. use the fact that magnitude Introduce “clipping” and Demonstrate clipping and
of the output voltage cannot “saturation”. saturation using an
exceed that of the power oscilloscope.
supply;

4.5. explain the meaning of gain Typical as well as ideal
and bandwidth of an values for these quantities
amplifier; should be discussed.

CXC A16/U2/17 55