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Found 29 results

  1. Write short notes on the following: (i) Stability criteria for an oscillator. (Rajasthan Univ. 2003 (ii) Hartley and Colpitt's oscillators. (iii) Hartley oscillator. (iv) Crystal oscillator. (v) R-C phase shift oscillator. (vi) Wien-bridge oscillator. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  2. Write short notes on any four of the following: (a) Basic principles of sinusoidal oscillator (b) Crystal oscillator (c) Clap oscillator (d) Hartley oscillator (e) Phase shift oscillator f) Wien bridge oscillator You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  3. Define the following terms used to specify the performance of an oscillator. (i) dial resolution, (ii) amplitude stability, (iii) frequency stabity, (iv) frequency range, (v) output impedance. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  4. Write the important factors in choosing a certain type of oscillato Why do we use R-C oscillators for audio frequencies and L-C oscillators for RF frequencies? Why does not an L-C tank is cuit produce sustained oscillations? Explain how the low frequency parasitics can be suppressed in an oscillator. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  5. Explain the working principle of a tunnel diode oscillator. Give the frequency range over which it is employed. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  6. Draw the block diagram of a beat frequency oscillator and explain the working of each block. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  7. Sketch the circuit schematic of a Wien bridge oscillator and explain its operation. Derive an expression for the frequency of oscillation and suggest a suitable scheme for amplitude stabilization of the oscillator. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  8. Draw the circuit of Wien bridge oscillator and explain how oscillations are generated ? You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  9. Sketch the circuit for a Wien bridge oscillator. What determines the frequency of oscillation. Will oscillations take place the bridge is balanced ? You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  10. What is Barkhausen criterion ? What do you mean by frequency stability and stability criterion in an oscillator Explain the Wien-bridge oscillator in detail. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  11. Sketch and explain the circuit of a phase shift oscillator using a bipolar junction transistor. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  12. What are the requirements of an oscillator circuit ? Draw a neat diagram of a phase shift oscillator using BJT. What advantage has the phase shift oscillator in the audio frequency You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  13. What is Barkhausen criterion for the feedback oscillator? Draw a neat diagram of a phase shift oscillator using BJT. Derive an expression for its frequency of oscillation. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  14. Compare R-C phase shift and crystal oscillators You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  15. Explain with figure the working of a typical inductance type high frequency oscillator. Discuss the limitations in realisation of radio frequency signals using transistor circuits. Explain how to realise radio-frequency signals using crystal oscillator. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  16. What are the advantages of using crystal oscillators ? Mention its applications. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  17. What is a piezoelectric crystal ? Sketch the circuit symbol, an electrical equivalent model and the variation of the reactance of the crystal with frequency. Explain how this crystal can be incorporated in an electronic circuit to form a stable oscillator. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  18. What is crystal oscillator? How it works ? Draw its equivalent circuit and derive results for impedance, resonant frequency You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  19. Explain briefly, how the oscillations are maintained in Hartley oscillator. Also derive the expression of frequency of oscillation You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  20. State Barkhausen criteria and explain the working of Hartley oscillator. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  21. How does the circuit of a Clapp oscillator differ from that of Colpitt's oscillator ? Derive frequency of oscillation of any one of them. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  22. Draw a neat circuit diagram of a Colpitt's oscillator using NPN transistor. Give its equivalent circuit. Derive expressions for the following: (i) The frequency of oscillatios (ii) The maximum gain for sustained oscillations. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  23. Draw the circuit diagram of a Colpitt's oscillator using transistor. Derive an expression for its frequency of oscillations. Deduce the starting condition for this oscillator. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  24. Draw and explain the circuit and working of any LC oscillator. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
  25. Draw a neat sketch of a generalised resonant circuit oscillator using three impedances. Explain how this circuit can be used to behave as (i) Colpitt's oscillator (ii) Hartley oscillator. You can write the answer and upload relevant images to justify the answer (if required) Let's together discuss and contribute in making the best answer
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