What is the function of VCO?

A voltage-controlled oscillator (VCO) is an oscillator circuit whose frequency can be controlled or varied by a DC input voltage. This type of circuit is also called a voltage-to-frequency converter (VFC). The output waveform from the VCO may be sine, square, or other waveshape depending on the circuit design.

What is NCO in communication?

A numerically-controlled oscillator (NCO) is a digital signal generator which creates a synchronous (i.e. clocked), discrete-time, discrete-valued representation of a waveform, usually sinusoidal.

What is a VCO in synthesizers?

Abbreviation for Voltage Controlled Oscillator. It is an oscillator whose pitch (or frequency) is controlled by an input voltage. In a keyboard, for example, pressing different keys produce different voltages, which then drive the oscillator circuit to produce specific pitches (notes).

What is VCO gain?

VCO feedback Like any oscillator, a VCO may be considered as an amplifier and a feedback loop. The gain of the amplifier may be denoted as A and the feedback as B. For the circuit to oscillate the total phase shift around the loop must be 360° and the gain must be unity.

What is the basic principle of VCO?

A voltage-controlled oscillator (VCO) is an electronic oscillator whose oscillation frequency is controlled by a voltage input. The applied input voltage determines the instantaneous oscillation frequency.

How does an NCO work?

NCOs are enlisted soldiers with specific skills and duties such as training, recruiting, tech or military policing. They give NCOs and lower ranks their missions, their assignments and their orders. NCOs often supervise lower ranks to ensure the assignments are done properly.

What are the applications of frequency synthesizer?

Frequency synthesizers are used in many modern devices such as radio receivers, televisions, mobile telephones, radiotelephones, walkie-talkies, CB radios, cable television converter boxes, satellite receivers, and GPS systems.

What is a tuning range?

[′tün·iŋ ‚rānj] (electronics) The frequency range over which a receiver or other piece of equipment can be adjusted by means of a tuning control.

What is oscillator control?

A voltage-controlled oscillator (VCO) is an electronic oscillator whose oscillation frequency is controlled by a voltage input. Consequently, a VCO can be used for frequency modulation (FM) or phase modulation (PM) by applying a modulating signal to the control input.

Why oscillator is used?

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.

How is the frequency of an oscillator controlled?

It is a type of oscillator in which the output frequency obtained is the function of the input signal. Usually, the frequency of an oscillator is measured by RC time constant. However, there exist some applications where the frequency is to be controlled by the input voltage.

How does a voltage controlled oscillator ( VCO ) work?

A voltage-controlled oscillator ( VCO) is an electronic oscillator whose oscillation frequency is controlled by a voltage input. The applied input voltage determines the instantaneous oscillation frequency. Consequently, a VCO can be used for frequency modulation (FM) or phase modulation (PM)…

Is there a digital alternative to a voltage controlled oscillator?

A digitally controlled oscillator based on a frequency synthesizer may serve as a digital alternative to analog voltage controlled oscillator circuits.

How does voltage control a high stability oscillator?

High stability crystal oscillator references often place the crystal in an oven and use a voltage input for fine control. The temperature is selected to be the turnover temperature: the temperature where small changes do not affect the resonance. The control voltage can be used to occasionally adjust the reference frequency to a NIST source.