Voltage Controlled Oscillator Ic

Basically the voltage input into the vco chip controls how many times a digital signal will oscillate in a given time period.

Voltage controlled oscillator ic.

The circuit is oftentimes known as voltage to frequency converter considering that the output frequency could be transformed by changing the input voltage. A voltage to frequency converter is a special type of vco designed to be very linear in frequency control over a w. A voltage controlled oscillator is an oscillator which produces oscillating signals waveforms with variable frequency. Voltage controlled oscillator vco from the name itself it is clear that the output instantaneous frequency of the oscillator is controlled by the input voltage.

A voltage controlled oscillator is an oscillator with an output signal whose output can be varied over a range which is controlled by the input dc voltage. The frequency of this waveform is varied by varying the magnitude of the input voltage. The oscillation frequency varies from few hertz to hundreds of ghz. A voltage controlled oscillator vco employing timer 555 is demonstrated in the following diagram.

It is a kind of oscillator which can produce output signal frequency over a large range few hertz hundreds of giga hertz depending on the input dc voltage given to it. A vco is also an integral part of a phase locked loop. Consequently a vco can be used for frequency modulation or phase modulation by applying a modulating signal to the control input. A voltage controlled oscillator is an electronic oscillator whose oscillation frequency is controlled by a voltage input.

For now you can imagine a voltage controlled oscillator vco to be a black box which takes in voltage of variable magnitude and produces an output signal of variable frequency and the frequency of the output signal is directly proportional to the magnitude of the input voltage. The applied input voltage determines the instantaneous oscillation frequency. The chip we will use is a 4046 chip. The frequency of the output waveform can be adjusted using an external control voltage.

A voltage controlled oscillator is an oscillator whose oscillation frequency is controlled by an input voltage. This is phase locked loop ic. It can be used to generates square and triangle waveforms simultaneously.