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Oscillator Calculations & Theory Tutorial

The document contains calculations and questions regarding different types of oscillators. It provides example calculations to determine the frequency of oscillation for Wien-bridge, Hartley, and Colpitts oscillators using given component values. It also includes subjective questions about the differences between various oscillator configurations like untuned vs tuned oscillators, Hartley vs Colpitts oscillators, and the operation of voltage controlled oscillators and phase locked loops.

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Mohd Äwiw Vießar Avondrah
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227 views2 pages

Oscillator Calculations & Theory Tutorial

The document contains calculations and questions regarding different types of oscillators. It provides example calculations to determine the frequency of oscillation for Wien-bridge, Hartley, and Colpitts oscillators using given component values. It also includes subjective questions about the differences between various oscillator configurations like untuned vs tuned oscillators, Hartley vs Colpitts oscillators, and the operation of voltage controlled oscillators and phase locked loops.

Uploaded by

Mohd Äwiw Vießar Avondrah
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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BTE3233/SEM I 1718

TUTORIAL CHAPTER 3 : OSCILLATOR (ANSWER)

CALCULATION QUESTIONS
1. For the Wien-bridge oscillator with the following component values, determine the
frequency of oscillation; R1 = R2 = 1 kΩ, C1 = C2 = 100 pF.
f = 159.2 kHz

2. For the Hartley oscillator with the following component values, find the frequency of
oscillation; L1a = L1b = 50 H, C1 = 0.01 F.
L = 100 mH, f = 159.2 kHz

3. For the Colpitts oscillator with the following component values, calculate the frequency
of oscillation; C1a = C1b = 0.01 F, L1 = 100 H.
f= kHz

4. For the Wien-bridge oscillator with the following component values, determine the
frequency of oscillation; R1 = R2 = 2 kΩ, C1 = C2 = 1000 pF.
f= kHz

5. For the Hartley oscillator with the following component values, find the frequency of
oscillation; L1a = L1b = 100 H, C1 = 0.001 F.
f= kHz

6. For the Colpitts oscillator with the following component values, calculate the frequency
of oscillation; C1a = 0.0022 F, C1b = 0.022 F, L1 = 3 mH.
f = 65 kHz

7. A parallel LC tank circuit is made up of an inductor of 10 mH and a winding resistance


of 5Ω. Capacitor is 0.45 F. Determine :
a. Resonance frequency, fr
b. Transistor amplifier, Q
c. Maximum impedance, Zmax
d. Bandwidth
2372 Hz, 29.8, 4442 Ω, 79.58

SUBJECTIVE QUESTIONS
1. State the difference between untuned oscillator and tuned oscillator.
2. List the four most common oscillator configurations.
3. Describe the oscillator action for an LC tank circuit.
4. Explain the difference between a Hartley oscillator and a Colpitts oscillator.
5. What types of LSI waveform generators are available?
6. List the advantage of a monolithic function generator and monolithic voltage-controlled
oscillator.
7. Describe the operation of VCO and phase detector.
8. Describe how loop acquisition is accomplished with a PLL from an initial unlocked
condition until frequency lock is achieved using block diagram.

1
BTE3233/SEM I 1718

SUBJECTIVE QUESTIONS
9. List the four most common oscillator configurations.
10. Describe the oscillator action for an LC tank circuit.
11. Explain the difference between a Hartley oscillator and a Colpitts oscillator.
12. What types of LSI waveform generators are available?
13. List the advantage of a monolithic function generator and monolithic voltage-controlled
oscillator.
14. Describe the operation of VCO and phase detector.
15. Describe how loop acquisition is accomplished with a PLL from an initial unlocked
condition until frequency lock is achieved.

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