Capacity to DigitalConverter (CDC) is a converter that converts capacities to voltages and is based on the sigma-delta converter
method. In the CDC process, an unknown capacitance takes the place of the unknown voltage and is converted into a digital value
. Themethod is used, among other things, for the determination of capacitances and for capacitive sensors
in orderto generate a control signal from a small change in capacitance.
The CDC converter works with a reference capacitance which it compares with an unknown capacitance. For this comparison, both capacitances are charged with the same voltage or with two known voltages and the charge curves are compared.