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Model voltage controlled oscillator

**Library:**Mixed-Signal Blockset / PLL / Building Blocks

VCO or voltage controlled oscillator is a voltage to frequency
converter. It produces an output signal whose frequency is controlled by the voltage at
the input **vctrl** port. The frequency of the output signal,
*F* is determined either by:

$$F=\left({K}_{VCO}\xb7{V}_{ctrl}\right)+{F}_{o}$$

where:

*K*_{vco}= voltage sensitivity (in Hz/V)*V*_{ctrl}= control voltage (in V)*F*_{o}= free running frequency (in Hz)

or from linear interpolation using the mapping:

$$F=\text{interp}\left({F}_{out}\left({V}_{cntl}\right)\right)$$

where:

*V*_{ctnl}= vector of control voltages (in V)*F*_{out}= vector of corresponding output frequencies (in Hz)

[1] Banerjee, Dean. *PLL Performance, Simulation and Design*.
Indianapolis, IN: Dog Ear Publishing, 2006.