| 摘要 |
A digital-to-analog (DAC) converter that includes a plurality of dynamically operated slave digital-to-analog (DAC) converters, each having a switched current mirror and a storage capacitor, and a static master digital-to-analog (DAC) converter in communication with the plurality of dynamically operated slave DAC converters, that distributes a current to at least one of the plurality of slave DAC converters such that voltage across the storage capacitor of the at least one slave DAC converter controls the switch current mirror so that the at least one slave DAC converter outputs currents that are equivalent to digital codes applied to the static master DAC converter. A ring counter is used to periodically refresh the charges on the storage capacitors that are lost by leakage. In addition to the periodic updates, an end user may perform immediate updates of selected slave DACs if necessary, via the ring counter.
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