Variable frequency R.C.oscillator.

摘要

An audio signal generator incorporating a variable R.C. oscillator (10) wherein the basic timing capacitance is replaced by a capacitance multiplying circuit (12) in which a potentiometer is employed to impart frequency variations, the slider of this potentiometer being connected to one input of an operational amplifier. The circuit has the advantage that a linear control scale is obtainable on which the frequency is independent of the absolute value of the control device.