Voltage Controlled Oscillator Schematics

Electronics Infoline Web

Software PLL locks VCXO to reference

provides a precisely controlled clock signal using voltage controlled crystal oscillator controlled by microcontroller.

http://www.edn.com/archives/1998/080398/16di.htm

http://www.edn.com/archives/1997/112097/24di_01.htm

Tutorial with Hartley VCO circuit.

http://www.electronics-tutorials.com/oscillators/voltage-controlled-oscillators.htm

http://www.musicfromouterspace.com/analogsynth/OctVCO_LM394_FixedSquare.html

robust and versatile vco provides a stable output to 300 MHz

http://www.edn.com/archives/1998/111998/24di.htm

With Separate Op-Amp for Pulse Wave.

http://www.musicfromouterspace.com/analogsynth/OctVCO_FixedSquare.html

1V/Octave

http://www.musicfromouterspace.com/analogsynth/lfo.html

1V/Octave

http://www.musicfromouterspace.com/analogsynth/vco.html