| 摘要 |
The reference ladder provides a plurality of reference signals having an extremely high accuracy. The reference ladder comprises no resistors. The values of all components and on-resistances of switches are not essential. Also no matching is necessary. The reference ladder comprises capacitors coupled in series. The terminals of each ladder capacitor are successively coupled across another capacitor which stores a base voltage. A comparator compares a predetermined voltage against voltage appearing across the reference ladder and determines the base voltage.
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