Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Cathode ray
Patent
1991-02-06
1992-10-13
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Cathode ray
324115, 364487, G01R 1300, G01R 1508
Patent
active
051554313
ABSTRACT:
A very fast autoscale feature can be implemented in a digitizing oscilloscope by using dedicated peak detector hardward [14] capable of operating at the maximum sampling rate of the A/D converter [12] to determine the minimum and maximum values of said input signal, in combination with a trigger counter [24, 26] to count the number of trigger events in the analog input signal. While in the autoscale mode, the oscilloscope microprocessor [22] can then set the appropriate scale and offset for the Y-axis of the display as a function of the maximum and minimum values determined by the peak detector [14] and set the sweep rate as a function of the count provided by the tripper counter [26].
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Burns William J.
Hewlett--Packard Company
Karlsen Ernest F.
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