The values of the capacitance between output A and ground can be programmed digitally in 18 steps as determined by the values of the four capacitors in the network. If the capacitance must not start from zero, another capacitor [C5] may be used. The circuit shown in Figure bellow can be used to perform as a digital controlled oscillator In the same figure, it suggests another application for this circuit - controlling the gain of an operational amplifier.
