Voltage Controlled Oscillator Using Op Amp

The working of this op amp relaxation oscillator can be explained as follows.

Voltage controlled oscillator using op amp.

By varying the input dc. The voltage vin can be further scaled and fed to a digital panel meter to read the rate. After the water bucket is completely filled the entire mass on the bucket side will be more than the fixed mass m placed on the other end. The pulses can be used to advance digital counter or mechanical counter using a solenoid driver transistor circuit.

Single supply op amp voltage controlled oscillator square and triangular output signals. Lm339 is a quad comparator. The other form of circuit for a voltage controlled oscillator is shown below which is implemented by using two operational amplifiers. It generates the square wave at the output whose frequency is determined by a control voltage.

A voltage controlled oscillator is an oscillator which produces oscillating signals waveforms with variable frequency. Once the tap is turned on the water flows into a water bucket thereby filling it slowly. 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 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. The first op amp is an integrator.

The first op amp works as an integrator. This circuit is a voltage controlled oscillator which is an oscillator whose frequency is determined by a control voltage. It is an oscillator whose output frequency is directly related to the voltage at its input. This causes the frequency to rise slowly until it hits a maximum and then falls back to the starting frequency.

A 10 hz sawtooth oscillator provides the control voltage in this case. The frequency of this waveform is varied by varying the magnitude of the input voltage. Vco voltage controlled oscillator using opamps. The oscillation frequency varies from few hertz to hundreds of ghz.