A system for improved digital-to-analog data conversion

Details A system for improved digital-to-analog data conversion A system for improved digital-to-analog data conversion

H - Electricity

03

M

H03M 1/72 (2006.01) H03M 1/06 (2006.01)

Patent

CA 2364309

A pipelined digital-to-analog converter (DAC) converts a digital input to an analog output. The pipelined DAC has a plurality of stages. A first of the plurality of stages is coupled to an initialization capacitor and ground. A remainder of the plurality of stages is coupled to a previous stage. Each of said plurality of stages comprises the following. A capacitor having a first and second plate, the capacitor for receiving a charge at the first plate in accordance with an associated bit of the digital input. A switch for coupling the first plate of said capacitor to ground when the capacitor is not receiving the charge. A switch for coupling the second plate of the capacitor to ground when the capacitor is receiving the charge. Coupling the capacitor to ground reduces the effect of stray capacitance in the pipelined DAC. 18

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