Build a Simple Voltage Controlled Oscillator Circuit Diagram. This circuit is a voltage-controlled oscillator, which is an oscillator whose frequency is determined by a control voltage. With the component values shown, the oscillator has a frequency of 8 kHz.
Voltage Controlled Oscillator Circuit Diagram
When an input signal is applied to the base of Ql the current flowing through Ql is varied, thus varying the time required to charge Cl. Due to the phase inversion in Ql the direction of output frequency change is 180 degrees out of phase with the input signal The output may be used to trigger a bistable flip-flop.
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