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LECTURE 130 – VOLTAGE-CONTROLLED OSCILLATORS
http://pallen.ece.gatech.edu/Academic/ECE_6440/Summer_2003/L130-VCO-I(2UP).pdf#:~:text=voltage%20controlled%20oscillator%20%28VCO%29%20is%20an%20oscillator%20whose,varied%20over%20the%20Rxor%20Tx%20range%20%28quickly%29.%20Nonlinear
Voltage-Controlled Oscillators - Cherry Audio
https://docs.cherryaudio.com/cherry-audio/instruments/ca2600/vco
Voltage Controlled Oscillators CA2600 includes three super-wide range oscillators that accurately model the imperfect waveforms of vintage ARP synthesizers. Unlike the original ARP 2600, all three have full functionality with all waveforms and pulse-width modulation capabilities. Their controls are almost identical, with a few sensible differences.
Voltage-Controlled Oscillator (VCO) - Synthesizer Academy
http://synthesizeracademy.com/voltage-controlled-oscillator-vco/
It is (sometimes) important for your oscillators to be in tune, so they must change pitch by a known amount given a certain change in voltage. To facilitate this, there are several different control voltage “standards” around. Two of the most popular are Volts per Octave and Hertz per Volt. Volts per Octave: Each volt equals 1 octave. If 2V=A2, 3V=A3, 4V=A4, etc.
LECTURE 130 – VOLTAGE-CONTROLLED OSCILLATORS
http://pallen.ece.gatech.edu/Academic/ECE_6440/Summer_2003/L130-VCO-I(2UP).pdf
Voltage Controlled Oscillators - Tuning A voltage controlled oscillator (VCO) is an oscillator whose frequency can be varied by a voltage (or current). In local oscillator applications, the VCO frequency must be able to be varied over the Rx or Tx range (quickly). Frequency Tx or Rx Range Voltage tuning range Linear tuning Nonlinear tuning Fig. 12.3-4
Voltage Controlled Oscillator - University of Kansas
https://people.eecs.ku.edu/~callen58/501/Voltage-Controlled_Oscillator.pdf
a control voltage. In other “words”: vco( ) vco C dθ t ω fv dt == Thus, if control voltage v C is a constant with respect to time, the oscillator frequency will likewise be a constant—the oscillator will produce a “pure” tone of the form: v vco vco(tcos)= (ωt+θ 0) Conversely, if the control voltage is time-varying, the oscillator frequency will also change with respect to time.
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