| 摘要 |
An analog switch for an analog-to-digital converter which permits an analog voltage level to be read from a series resistor ladder network and be compared to an external analog signal by a comparator. The incremental levels of the series resistor ladder network are selected by a tree decoder responsive to the comparator output. The analog switch has two transistors, the first transistor being connected between the resistor ladder network and the comparator and being gated by a second transistor and the tree decoder so that the first transistor may be precharged or accessed by the tree decoder.
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