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What do you mean by voltage controlled oscillator?
A Voltage Controlled Oscillator is an oscillator which produces oscillating signals (waveforms) with variable frequency. The frequency of this waveform is varied by varying the magnitude of the Input voltage. For now you can imagine a Voltage Controlled Oscillator (VCO) to be a black box which takes in Voltage of variable magnitude and produces
Which is the most common type of oscillator?
Some of the most common oscillator circuits are LC circuit, Tank circuit etc. A Voltage Controlled Oscillator is an oscillator which produces oscillating signals (waveforms) with variable frequency. The frequency of this waveform is varied by varying the magnitude of the Input voltage.
How is the frequency of an oscillator determined in a VCO?
To understand the basic idea of a VCO let us consider a RC oscillator. In a RC oscillator the frequency of the output wave depends on the value of the capacitor used in the circuit, since the frequency is given by the formulae Hence in this case the frequency of oscillation is inversely proportional to the value of capacitance used in the circuit.
What are the different types of VCO circuits?
There are many types of VCO circuits used in different applications, but they can be broadly classified into two types based on their output voltage. Harmonic Oscillators: If the Output waveform of the oscillator is sinusoidal then it is called as harmonic Oscillators.
How is the frequency of a ring oscillator controlled?
The frequency of a ring oscillator is controlled by varying either the supply voltage, the current available to each inverter stage, or the capacitive loading on each stage.
What is the bandwidth of a VCO circuit?
The VCO was developed using digital CML circuits optimized for extreme high-speed operation but with the full-swing characteristics of digital logic. It was designed for a bandwidth of 0.25 – 20 GHz but operated about 32% slower. Using newer device and interconnection models, the performance of the VCO may now be accurately predicted.