MEC3074F
TUTORIAL 1 (OP-AMPS & FILTERS)
DUE DATE: 27 FEBRUARY 2020 @ 8AM LECTURE
| SECTION 1 – OP-AMPS
Research application examples for each of the following Op-Amps and mention the advantage of the
specified op-amp for the given application:
● Non-inverting amplifier
Application example: Impedance buffering for circuits  2mks
Application specific advantage: High output impedance  2mks
● Inverting amplifier
Application example: In order to sustain oscillations for Barkaushen criteria in an oscillator.  2mks
Application specific advantage: Sustainable oscillations  2mks
● Differential amplifier
Application example: Volume control  2mks
Application specific advantage: Modulation of amplitude  2mks
● Voltage follower
Application example: Used to provide high impedance at input, drawing less current from the
circuit.  2mks
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Application specific advantage: Loading effects can be avoided.  2mks
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● Integrator
Application example: used in Analog applications  2mks
Application specific advantage: Conversion between analog and digital signals  2mks
● Differentiator
Application example: Used in wave shaping circuits  2mks
Application specific advantage: detection of high frequency components  2mks
| SECTION 2 – FILTERS (EXAMPLE QUESTION FROM SLIDES)
Given a filter with transfer function:
1. What type of filter is this? (Low-/high-pass)
Low pass  1mk
G
2. Derive an expression for the cut-off frequency 𝑓𝑐---No answer provided
G
Given that 𝑅 = 1𝐾Ω and 𝐶 = 1𝜇𝐹:
3. Draw the circuit---no diagram drawn
4. What is the value of 𝑓𝑐?No answer provided
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5. What is the amplitude of the output signal when the input signal is a 10 Vp-p sine wave at 250
Hz? No answer provided
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7. What is the attenuation of the filter in dB at 250 Hz?No answer provided
8. If the attenuation is -16 dB at 1 kHz, what is the attenuation at 10 kHz?No answer provided