Advertisements
Advertisements
प्रश्न
Give the Barkhausen conditions for sustained oscillations.
Advertisements
उत्तर
Barkhausen conditions for sustained oscillations
The following condition called Barkhausen conditions should be satisfied for sustained oscillations in the oscillator.
- The loop phase shift must be 0° or integral multiples of 2π.
- The loop gain must be unity. |Aβ| = 1
Here; A – Voltage gain of the amplifier,
b – feedback ratio; (fraction of the output that is fed back to the input)
APPEARS IN
संबंधित प्रश्न
Draw the circuit diagram to study the characteristic of the transistor in common emitter mode. Draw the input and output characteristics.
Transistor functions as a switch. Explain.
In a common emitter amplifier, the input resistance is 1000 Ω, the peak value of Input signal voltage is 5 mV, and β = 60. The peak value of output current is
If `alpha`-current gain of a transistor is 0.98. What is the value of `beta`- current gain of the transistor?
ln switching circuit, transistor is in ON state and values of IC and IB are 4.2 mA and 5 µA respectively and RC= l k`Omega` and RB= 300 k`Omega`. If VBE = 0.5 V, find the value of VBB.
For a common emitter configuration, if 'α' and 'β' have their usual meanings, the correct relationship between 'α' and 'β' is ______.
The current gain `alpha` of a transistor is 0.95. The change in collector current corresponding to a change of 0.4 mA in the base current in a common emitter arrangement is ______.
Explain the working of the n-p-n transistor in a common base configuration.
The collector current in a common-emitter transistor amplifier is 4 mA. When the base current is increased by 20 µA, the collector current increases to 6 mA. The current gain is ______.
Define β
