A phase-locked loop circuit includes an array of selectable capacitors
formed within the phase-locked loop circuit to enable the phase-locked
loop circuit to provide a degree of coarse frequency control by adding or
removing capacitors and a degree of fine frequency control by sinking or
sourcing current from a charge pump into a loop filter. A finite state
machine is provided within a voltage controlled oscillator calibration
circuit that communicates with an external baseband processor to initiate
a calibration process, and further to determine how many capacitors of an
array of capacitors if formed within the phase-locked loop circuit should
be coupled to provide the coarse frequency control.