Simple VCO

The frequency of the sine wave oscillator
shown here is determined by a direct voltage,
Uc, of 0-15 V. The distortion on output
signals of up to 10 V p-p is not greater than
1%; when the output is reduced with the
aid of P1 to 1 V p-p. the distortion drops to
below 0.1%. It is not recommended to use
output signals below 1 V p-p, because the
oscillator then become unstable and temperature-dependent.

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