What is the basic principle of oscillators, Electrical Engineering

Assignment Help:

Q. What is the basic principle of oscillators?

 In an oscillating circuit, the amplitude of voltage or current oscillations decays with time owing to the dissipation of energy in the resistance contained in the circuit. If a negative resistance is incorporated in the circuit to generated energy that compensates for the loss of energy through the passive resistance, oscillations with undiminished amplitude can occur. Basically, therefore, a negative resistance must be provided in an oscillator. This is accomplished in a feedback oscillator by providing an external positive feedback to make the overall gain infinite. In a negative resistance oscillator, the desired negative resistance is supplied by internal positive feedback.

 No external signal is applied to an oscillator. When the power supply to the system is switched on, a noise voltage is produced. The frequency spectrum of noise being very wide, it always has a voltage component at the frequency required for the oscillator. Thus the initial signal to trigger the oscillations is obtained from the noise voltage. The ac power of the output signal is supplied by the dc supply source.


Related Discussions:- What is the basic principle of oscillators

Explain interrupts of 8085, Explain Interrupts of 8085. a) Maskable  in...

Explain Interrupts of 8085. a) Maskable  interrupt b)  Vectored interrupt c)  Non maskable interrupt d) Hardware interrupt e)  Software interrupt

Evaluate the transfer function of the nested-loop system, Q. Determine the ...

Q. Determine the transfer function C(s)/R(s) of the nested-loop feedback system shown in Figure.

Binary codes, what are the types of binary codes

what are the types of binary codes

Draw and explain the block diagram of dma controller, Draw and explain the ...

Draw and explain the block diagram of DMA controller. The fundamental idea of DMA is to transfer blocks of data directly between peripherals and memory. The data don't suffer t

What do you mean by macro, What do you mean by Macro? MACRO : A seque...

What do you mean by Macro? MACRO : A sequence of instructions to that a name is assigned is termed as macro. Macros and subroutines are same. Macros are utilized for short se

Find the current and voltage drop at resistor, For the circuit in figure, f...

For the circuit in figure, find the current and voltage drop at every resistor

Get the equivalent inductance at terminal in circuit, Get the equivalent in...

Get the equivalent inductance at terminal in circuit: Acquire the equivalent inductance at terminal AB in circuit shown in Figure. Solution Inductances also follow the

Determine the peak magnetizing current, A forward converter has the followi...

A forward converter has the following parameters: input source voltage V s = 100 V, N 1 /N 2 = N 1 /N 3 = 1, magnetizing inductance L m = 5 mH, output inductor L o = 200 μH, C

SUPERPOSITION THEOREM, CONCLUSION IN BRIEF OF SUPERPOSITION IN ASSIGNMENT

CONCLUSION IN BRIEF OF SUPERPOSITION IN ASSIGNMENT

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd