Compact digital-to-analog converter

摘要

An example digital-to-analog converter includes a reference scaling circuit receiving a first reference current and generating a second reference current. A first plurality of current sources is coupled to a summing node with a current of a first one of the first plurality of current sources proportional to the first reference current. A current of a second one of the first plurality of current sources is substantially equal to twice the current of the first one of the first plurality of current sources. A second plurality of current sources is coupled to the summing node. A current of a first one of the second plurality of current sources is proportional to the second reference current. A current of a second one of the second plurality of current sources is substantially equal to twice the current of the first one of the second plurality of current sources.

主权项

1. A digital-to-analog converter, comprising:
a reference scaling circuit coupled to receive a first reference current, the reference scaling circuit coupled to generate a second reference current in response to the first reference current; a first plurality of current sources coupled to a summing node, wherein a current of a first one of the first plurality of current sources is proportional to the first reference current, wherein a current of a second one of the first plurality of current sources is substantially equal to twice the current of the first one of the first plurality of current sources; and a second plurality of current sources coupled to the summing node, wherein a current of a first one of the second plurality of current sources is proportional to the second reference current, wherein a current of a second one of the second plurality of current sources is substantially equal to twice the current of the first one of the second plurality of current sources.