| 摘要 |
An integrated circuit for converting an analog input signal to a corresponding digital signal. The integrated circuit has selectable operational modes and comprises a digital-to analog converter (DAC) to produce a variable reference voltage, a sample and hold circuit for sampling and holding the analog input signal to produce a sampled and held analog input signal, a comparator for comparing the reference voltage with the sampled and held analog input signal to produce a difference signal, a converter to convert the difference signal into the digital signal and related to the difference signal, and a selector for the operational modes. The operational modes may be one of a single ended current mode, a single ended voltage mode, a differential current mode and a differential voltage mode.
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