| 摘要 |
A time-differential analog comparator includes a variable frequency signal source, a timing circuit, a counting circuit, and an evaluation circuit. The variable frequency signal source provides a repeating signal having a frequency corresponding to a value of an analog input. The timing circuit defines a timing sequence including a first time interval and a second time interval and generates a mode select signal at a time between the first time interval and the second time interval to stimulate a change in the analog input. The counting circuit is coupled to the timing circuit to count the periods of the repeating signal. The evaluation circuit coupled generates a decision signal in response to a count of the periods of the repeating signal indicated by the counting circuit. The first time interval is not equal to the second time interval to generate an offset in the decision signal.
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