Patent ID: 6583743
Filing Date: 2003-06-24
Classification: H03M

Abstract:
A pipelined digital-to-analog converter (DAC) for converting a digital input to an analog output, said pipelined DAC comprising:a plurality of stages, a first of said plurality of stages being coupled to an initialization capacitor and ground, each of a remainder of said plurality of stages being respectively coupled to a previous stage, wherein each of said plurality of stages includes: a capacitor having a first plate and a second plate, said capacitor receiving a charge at said first plate in accordance with an associated bit of said digital input; a first switch that selectively couples said first plate of said capacitor to ground when said capacitor is not receiving said charge; and a second switch that selectively couples said second plate of said capacitor to ground when said capacitor is receiving said charge, wherein coupling said capacitor to ground reduces an effect of stray capacitance in said pipelined DAC.