Patent ID: 9312877
Filing Date: 2016-04-12
CPC Classification: H03M

Claim Text:
1. A capacitive digital to analog converter (DAC), comprising: a first switching device that receives first, second, third, and fourth reference potentials at respective inputs and that selectively connects one of the first, second, third, and fourth reference potentials to a first output of the first switching device, wherein the first and second reference potentials are approximately equal, and wherein the third and fourth reference potentials are approximately equal; a first capacitor that is connected between the first output of the first switching device and a common node; a second switching device that receives the first, second, third, and fourth reference potentials at respective inputs and that selectively connects one of the first, second, third, and fourth reference potentials to a second output of the second switching device; and a second capacitor that is connected between the second output of the second switching device and the common node.