What are the criteria of an oscillator to give infinite output?
Table of Contents
- 1 What are the criteria of an oscillator to give infinite output?
- 2 What is the characteristics of transistor?
- 3 What are the specifications of a transistor?
- 4 What is the minimum gain needed for the oscillator to oscillate?
- 5 What is the criteria to be followed in obtaining oscillator output?
- 6 What is an oscillator explain the concept of oscillation with Barkhausen criteria?
What are the criteria of an oscillator to give infinite output?
The output Vo must be equal to the input voltage (Vs + βVo) multiplied by the gain A of the amplifier. Where Aβ is the feedback factor or the loop gain. If Aβ = 1, Af = ∞. Thus the gain becomes infinity, i.e., there is output without any input.
What is the characteristics of transistor?
Common Base (CB) Configuration of Transistor
| Transistor Characteristics | Definition | Formula/Expression |
|---|---|---|
| Current Transfer Characteristics | The variation of collector current(IC) with the emitter current(IE), keeping Collector Base voltage(VCB) constant. The resulting current gain has a value less than 1. | α=ΔICΔIB|VCB=Constant |
What are the specifications of a transistor?
Specification of transistor
- Collector-base voltage (VCB) is the maximum voltage that can be applied across the base and collector of a transistor.
- Collector-emitter voltage (VCEO) is the maximum that can be applied across the collector and emitter of a collector.
What is a transistor oscillator?
An oscillator is an electronic circuit that generates repeated waveforms. One of the most commonly used oscillator circuits is made from a pair of transistors that are rigged up to alternately turn on and off. This type of circuit is called a multivibrator.
What is oscillator transistor as oscillator Class 12?
An oscillator can be defined as, that produces a continuous, repeated, alternating waveform without any input.
What is the minimum gain needed for the oscillator to oscillate?
The voltage gain of the amplifier circuit MUST be equal too or greater than three “Gain = 3” for oscillations to start because as we have seen above, the input is 1/3 of the output.
What is the criteria to be followed in obtaining oscillator output?
Gain in Oscillators: The oscillator gain must equal one (Aβ = 1–180°) at the oscillation frequency. The circuit becomes stable when the gain exceeds one and oscillations cease. When the gain exceeds one with a phase shift of –180°, the active device non-linearity reduces the gain to one.
What is an oscillator explain the concept of oscillation with Barkhausen criteria?
Barkhausen Criteria Conditions which are required to be satisfied. to operate the circuit as an oscillator are. called as “Barkhausen criterion” for sustained oscillations. The Barkhausen criteria should be satisfied by an amplifier with positive feedback to ensure the sustained oscillations.