| 摘要 |
At discrete time intervals, a clocked switch stores successive samples of a signal, whose slope is to be determined, across a capacitor. Amplifying means measure the capacitor charging current that changes the storage level at each interval. A positive or negative signal slope is sensed when the measured charging current exceeds predetermined positive or negative threshold levels. Logic means furnish outputs at separate terminals that indicate the slope to be positive, not positive, negative, not negative, most recently positive, and most recently negative.
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