DIGITAL TO ANALOG CONVERTER WITH CURRENT STEERING SOURCE FOR REDUCED GLITCH ENERGY ERROR

摘要

A digital to analog converter including a current steering source and a master replica bias network. The current steering source includes a data current source providing a source current to a source node, a switch circuit operative to steer the source current to a selected one of first and second control nodes based on a data bit, a buffer circuit that buffers the source current between the first control node and a first current output node or between the second control node and a second current output node, and an activation current source provides activation current to the buffer circuit via the first and second control nodes. The master replica bias network replicates biasing of the buffer circuit relative to a replica control node and drives the buffer circuit to maintain the first control node, the second control node and the replica control node at a common master control voltage.

主权项

1. A digital to analog converter, comprising:
a switch circuit operative to steer a source current from a source node to a selected one of first and second control nodes based on a data bit; a buffer circuit that buffers said source current between said first control node and a first current output node and between said second control node and a second current output node; an activation current source that is configured to provide an activation current to said buffer circuit via said first and second control nodes; and a master replica bias network that is configured to replicate biasing of said buffer circuit relative to a replica control node and to drive said buffer circuit to maintain said first control node, said second control node and said replica control node at a common master control voltage.