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What is oscillation effect?

What is oscillation effect?

an effect expressible as a quantity that repeatedly and regularly fluctuates above and below some mean value, as the pressure of a sound wave or the voltage of an alternating current. a single fluctuation between maximum and minimum values in such an effect.

What is the function of oscillator?

Oscillators convert direct current (DC) from a power supply to an alternating current (AC) signal. They are widely used in many electronic devices ranging from simplest clock generators to digital instruments (like calculators) and complex computers and peripherals etc.

What are the effects of damping in an oscillator?

Under Damped: “The condition in which damping of an oscillator causes it to return to equilibrium with the amplitude gradually decreasing to zero; system returns to equilibrium faster but overshoots and crosses the equilibrium position one or more times.

What are the advantages of oscillator?

(ii) An oscillator is a non-rotating device. Consequently, there is no wear and tear and hence longer life. (iii) Frequency of oscillation may be conveniently varied. (iv) Voltage or currents of any frequency (20 Hz to 100 MHz) adjustable over a wide range can be generated.

What is oscillation effect in chemistry?

Oscillating reactions are among the most fascinating of chemical reactions. In one type of reaction, a mixture of chemicals goes through a sequence of color changes, and this sequence repeats periodically. In another, the mixture periodically emits a burst of gas, foaming up.

What is the principle of oscillation?

Oscillation is defined as the method of repeating variations in time of any sum or measure of its equilibrium value. It is also possible to describe oscillation as a periodic variation of a matter between two values, or of its central value.

Why does damping occur in oscillating system?

Damping occurs when a force is exerted on the oscillating object that causes the amplitude of its oscillations to get smaller and smaller over time. If a driving force is applied at the same frequency as the natural frequency, then the amplitude of the oscillations can increase dramatically.

How does damping affect waves?

Damping of a wave lowers the amplitude of a wave, PE and KE decrease but frequency remains the same.

What is basic principle of oscillator?

There are many types of electronic oscillators, but they all operate according to the same basic principle: an oscillator always employs a sensitive amplifier whose output is fed back to the input in phase. Thus, the signal regenerates and sustains itself. This is known as positive feedback.

What are the factors affecting the stability of an oscillator?

These deviations in frequency are caused due to variations in the values of circuit features (circuit components, transistor parameters, supply voltages, stray-capacitances, output load etc.) that determine the oscillator frequency. Other factors responsible for drift in oscillator frequency are given below.

How does an oscillator work even without external input?

From the above expression, it is clear that even without external input (Vs = 0), the circuit can generate the output just by feeding a part of the output as its own input. And also closed loop gain increases with increase in amount of positive feedback gain. The oscillation rate or frequency depends on amplifier or feedback network or both.

How does phase noise affect a local oscillator?

This effect is due to the phase noise of the local oscillator modulating the carrier of the strong signal. The carrier is spread in frequency by the phase noise mod- ulation, which results in a power spectral density that is proportional to the local oscil- lator’s SSB phase noise.

What causes the oscillator frequency to drift?

Other factors responsible for drift in oscillator frequency are given below. Operating point of active device – The effects of variations in inter-element capacitances can be neutralized by introducing a swamping capacitor across the offending elements (the introduced capacitor becomes the part of the tank circuit).