A voltage-controlled oscillator is an electronic oscillator whose oscillation frequency is controlled by a voltage input. The applied input voltage determines the instantaneous oscillation frequency.
27 MHz VCXO clock generator IC (TLSI T73227), used in a DVB-T set-top box.
The Korg Monologue is a monophonic synthesizer with two VCOs.
A variable frequency oscillator in electronics is an oscillator whose frequency can be tuned over some range. It is a necessary component in any tunable radio transmitter and in receivers that work by
A Heathkit amateur radio transmitter circa 1969, with external VFO