| 摘要 |
A subranging converter employing a flash converter and a current-summing DAC which produces a current output. The DAC has a set of 2<n> - 1 current sources and 2<n> - 1 digital switches. Each switch channels its associated current source output either to the common output summing node or to ground. Each DAC switch, other than the first switch, takes its control input directly from an associated comparator in the flash converter. The direct connection between the comparators and the DAC eliminates the need for a video delay line and provides a fast conversion process. |
