CPC H03M 1/0617 (2013.01) [H03M 1/38 (2013.01); H03M 1/66 (2013.01)] | 20 Claims |
1. A current steering digital-to-analog converter comprising:
a plurality of current cells each including a current source circuit and a current switch circuit to selectively output a current in response to a first input signal corresponding to a digital signal;
a dummy current cell including a dummy current source circuit and a dummy current switch circuit to output a current in response to a second input signal; and
a current switch bias circuit coupled to the dummy current cell and configured to generate a first bias voltage that tracks a first voltage of an internal node of the dummy current source circuit and is applied to the current switch circuit,
wherein the current switch bias circuit adjusts a level of the first bias voltage such that a difference between the first bias voltage and the first voltage is constant.
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