Patent ID: 7061418

Claim:
An n-bit digital/analog converter for converting an n-bit digital word, where n is an integer greater than one, comprising: an (n−1) bit bufferless switched capacitor digital/analog converter having an output for direct connection to a capacitive load, first and second reference voltage inputs, and an (n−1) bit digital input; an (n−1) bit selective inverter for supplying to the (n−1) bit digital input the (n−1) least significant bits of the n-bit digital word without inversion when the most significant bit of the n-bit digital word has a first value and with inversion when the most significant bit has a second value different from the first value; and a switching arrangement for connecting the first and second reference voltage inputs to receive first and second reference voltages, respectively, when the most significant bit has the first value and to receive the second and first reference voltages, respectively, when the most significant bit has the second value.