Explain and show Undamped Oscillations from Tank Circuit

Answers

- A tank circuit produces damped oscillations. However, in practice, we need continuous undamped oscillations for the successful operation of electronics equipment. In order to make the oscillations in the tank circuit undamped, it is necessary to supply correct amount of energy to the tank circuit at the proper time intervals to meet the losses. Thus referring back to Fig. 6.2, any energy which would be applied to the circuit must have a polarity conforming to the existing polarity at the instant of application of energy. If the applied energy is of opposite polarity, it would oppose the energy in the tank circuit, causing stoppage of oscillations. Therefore, in order to make the oscillations in the tank circuit undamped, the following conditions must be fulfilled:
(i) The amount of energy supplied should be such so as to meet the losses in the tank circuit and the
a.c. energy removed from the circuit by the load. For instance, if losses in LC circuit amount to 5 mW and a.c. output being taken is 100 mW, then power of 105 mW should be continuously supplied to the circuit.
(ii) The applied energy should have the same frequency as that of the oscillations in the tank circuit.
(iii) The applied energy should be in phase with the oscillations set up in the tank circuit i.e. it should aid the tank circuit oscillations.

- If these conditions are fulfilled, the circuit will produce continuous undamped output as shown in Fig. 6.4.

Wilfykil answered the question on August 15, 2019 at 09:14

Next: Add a question tag to the following statements.
Previous: Define the following terms.

View More Electronics Questions and Answers | Return to Questions Index

Exams With Marking Schemes

Related Questions

What is an Oscillatory Circuit?(Solved)
What is an Oscillatory Circuit?

Date posted: August 15, 2019. Answers (1)
List and explain the various types of Sinusoidal Oscillations(Solved)
List and explain the various types of Sinusoidal Oscillations

Date posted: August 15, 2019. Answers (1)
Give the advantages of a sinusoidal oscillator(Solved)
Give the advantages of a sinusoidal oscillator

Date posted: August 15, 2019. Answers (1)
What is a Sinusoidal Oscillator?(Solved)
What is a Sinusoidal Oscillator?

Date posted: August 15, 2019. Answers (1)

Define the term Phase Reversal(Solved)
Define the term Phase Reversal

Date posted: August 15, 2019. Answers (1)
Select a suitable value for the emitter bypass capacitor in Fig. 5.4 if the amplifier is to operate over a frequency range from 2 kHz...(Solved)
Select a suitable value for the emitter bypass capacitor in Fig. 5.4 if the amplifier is to operate over a frequency range from 2 kHz to 10 kHz.

Date posted: August 15, 2019. Answers (1)
What is the role of emitter bypass capacitor C_E in CE amplifier circuit shown in Fig. 5.3 ? Illustrate with a numerical example.(Solved)
What is the role of emitter bypass capacitor C_E in CE amplifier circuit shown in Fig. 5.3 ? Illustrate with a numerical example.

Date posted: August 15, 2019. Answers (1)
Show and explain a Practical Circuit of Transistor Amplifier(Solved)
Show and explain a Practical Circuit of Transistor Amplifier

Date posted: August 15, 2019. Answers (1)

Define Single Stage Transistor Amplifier and explain how it works(Solved)
Define Single Stage Transistor Amplifier and explain how it works

Date posted: August 15, 2019. Answers (1)
For a single stage transistor amplifier, the collector load is R_C = 2 kilo-ohms and the input resistance R_i = 1 kilo-ohm. If the current...(Solved)
For a single stage transistor amplifier, the collector load is R_C = 2 kilo-ohms and the input resistance R_i = 1 kilo-ohm. If the current gain is 50, calculate the voltage gain of the amplifier.

Date posted: August 15, 2019. Answers (1)
If the collector current changes from 2 mA to 3mA in a transistor when collector- emitter voltage is increased from 2V to 10V, what is...(Solved)
If the collector current changes from 2 mA to 3mA in a transistor when collector- emitter voltage is increased from 2V to 10V, what is the output resistance?

Date posted: August 15, 2019. Answers (1)
A change of 200 mV in base-emitter voltage causes a change of 100 µA in the base current. Find the input resistance of the transistor.(Solved)
A change of 200 mV in base-emitter voltage causes a change of 100 μA in the base current. Find the input resistance of the transistor.

Date posted: August 15, 2019. Answers (1)
What does the performance of a transistor amplifier depend upon?(Solved)
What does the performance of a transistor amplifier depend upon?

Date posted: August 15, 2019. Answers (1)
What is the Output from Transistor Amplifier?(Solved)
What is the Output from Transistor Amplifier?

Date posted: August 15, 2019. Answers (1)
Determine the Q point of the transistor circuit shown in Fig. 4.40. Also draw the d.c. load line. Given ß = 200 and V_BE =...(Solved)
Determine the Q point of the transistor circuit shown in Fig. 4.40. Also draw the d.c. load line. Given β = 200 and V_BE = 0.7V.

Date posted: August 15, 2019. Answers (1)
In the circuit diagram shown in Fig. 4.39 (i), if V_CC = 12V and R_C = 6 kilo-ohms, draw the d.c. load line.(Solved)
In the circuit diagram shown in Fig. 4.39 (i), if V_CC = 12V and R_C = 6 kilo-ohms, draw the d.c. load line. What will be the Q point if zero signal base current is 20μA and β = 50?

Date posted: August 15, 2019. Answers (1)
For the circuit shown in Fig. 4.38 (i), draw the d.c. load line.(Solved)
For the circuit shown in Fig. 4.38 (i), draw the d.c. load line.

Date posted: August 15, 2019. Answers (1)
Explain Transistor Load Line Analysis(Solved)
Explain Transistor Load Line Analysis

Date posted: August 15, 2019. Answers (1)
Explain Transistor as an Amplifier in CE Arrangement(Solved)
Explain Transistor as an Amplifier in CE Arrangement

Date posted: August 15, 2019. Answers (1)
Which are the Commonly Used Transistor Connection?(Solved)
Which are the Commonly Used Transistor Connection?

Date posted: August 15, 2019. Answers (1)

Quick Links