Week 1-3                 

:

Chapter 1: Voltage Regulators (9 hours):

·         Overview of Unregulated Power Supply: The building block and circuitry (full wave rectifier with filter). Regulated Power Supply: Unregulated power supply + voltage regulator.

·         Voltage Regulators: Concept of voltage regulation, Regulation specifications (data sheets 78XX series): load regulation, line regulation, temperature coefficient

·         Voltage Regulator Circuits for Series Type Regulators: Pass element, sampling circuit, error amplifier, reference voltage, negative feedback, safe operating area (SOA). Protection circuit: constant current, foldback current and their calculation, thermal protection, Calculation of load regulation and line regulation.

·         Heat sink and thermal consideration

·         Monolithic regulators (78XX etc): fixed, adjustable. Applications: current booster, constant DC current source.

·         Switching Regulators: Basic topologies – step down (buck) step up (boost), buck-boost; Monolithic switching regulators: voltage-mode control, current mode control. Monolithic switching regulator ( LT1070 etc.).

·          

Weeks 4-6             

:

Chapter 2: Power Amplifiers (9 hours)

·         Classes of operation A, B, AB, C and D

·         Class A power amplifiers:  Single-ended direct-coupled amplifiers, single ended RC coupled amplifiers; single ended L-C coupled amplifiers, single-ended transformer coupled amplifiers, SOA, input power, output power, power dissipation, power conversion efficiency, harmonic distortion due to nonlinearity of the power device. Heat sink and thermal consideration.

·         Class B and Class AB power amplifiers: Push-pull power amplifier circuit using centre-tapped transformers, push-pull power amplifiers circuit using complementary symmetry power transistors, cross-over distortion, biasing circuits used to eliminate the cross-over distortion, harmonic distortion due to nonlinearity of power device, SOA, thermal runaway, input power, output power, power dissipation, power conversion efficiency..

                Heat sink and thermal consideration.

·         The fundamentals of class C and class D amplifiers.

Week 7-9  

:

Chapter 3: Oscillators (8 hours)

·         Sinusoidal Harmonic Oscillators: Positive feedback, the Barkhausen Criterion for circuit to oscillate, general form of oscillator circuit, the Colpitts and Hartley oscillator derived from the general form of oscillator circuit, the crystal oscillator circuits (as an extension to the Colpitts and Hartley circuits). the Wein Bridge Oscillator, amplitude stabilization in Wein Bridge Oscillator, the Phase-Shift Oscillator,

·         Relaxation Oscillator: The fundamentals of relaxation oscillators based on negative resistance devices (using capacitor or inductor discharge circuits); astable and monostable circuits.

·         Monolithic Timers: The 555 Timer (astable and monostable circuits), calculation of duty-cycle, frequency of oscillation and delay time; voltage-controlled oscillator (VCO).using 555 Timer IC and other VCO IC such as LM566, their application such as frequency modulators, time-base generators, tone generator etc.

·         Phase-Locked Loops: PLL system: Phase detector, loop filter and VCO; free running frequency, DC error signal, lock range, capture range, Monolithic PLLs: The 565 PLL (FM modulator and demodulator circuits and some calculation to determine component values)

Week 8  

Mid-semester Break

Week 10-11       

:

Chapter 4: Active Filters (7 hours)

• Idealized filter responses (brick-wall), Effect of filtering in the frequency domain and time domain.
• The transfer function and Bode plot.
• First Order Active Filters: The Low-pass, High-pass and Wideband Band-pass with gain.
• Standard second order responses:  The Low-pass, High-pass, Band-pass, notch and all-pass response.
• Low Pass KRC Filters: Equal Component KRC circuits, Unity-gain KRC circuit.
• High-Pass KRC Filters: Equal Component KRC circuits, Unity-gain KRC circuit.
• Band-pass KRC Filters; Band-Reject KRC filters; Multiple Feedback KRC filters; State Variable and Biquad Filters.
• Filter Approximations: Butterworth, Chebyshev and Bessel Approximation.
• Cascade Design : Higher Order Filters (Butterworth, Chebyshev and Bessel)

Week 12-14         

:

Chapter 5: Applications of Thyristors and Other Devices (4 hours)

·         Overview of basic operation of SCR, SUS,TRIAC, DIAC.

·         Application: SCR,TRIAC, SUS and DIAC in power control circuit (e.g. Half wave and full-wave power control circuits).

·         Negative Resistance Device: UJT and PUT and their applications in relaxation oscillator

·         SCR and TRIAC controls using UJT and PUT

Week 15-16

:

Chapter 6: Digital to Analog and Analog to Digital Converters

(5 hours)

• Perfomance Specifications: D-A Converters (DACs), DAC specifications, A-D Converters(ADCs), ADC specifications.
• Digital-to-Analog Conversion Techniques: Weighted resistor DACs; R-2R Ladder; current mode R-2R ladder; voltage mode R-2R ladder.
• Applications of monolithic DAC 0808.
• Analog-to-digital conversion techniques: DAC-based (Digital     Ramp) ADCs, Successive Approximation ADCs,
• Applications of monolithic ADC 0804
• Flash ADCs, Integrating type ADCs.

REFERENCES

:

No.

Assessment

Number

% each

% total

Dates

1

Assignments

2

5%

10%

2

Quiz

5

2%

10%

2

Tests

2

15%

30%

3

Final Exam

1

50%

50%

Exam Wk

Total

100%