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Segmented Delay Meter

IP.com Disclosure Number: IPCOM000074057D
Original Publication Date: 1971-Mar-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Brinner, TR: AUTHOR [+3]

Abstract

This system partitions the time to be measured into intervals that are not overlapping to provide an extremely accurate measuring means. As shown at A, a Stop Delay block provides the minimum time interval which must exist for the start pulse to condition the Latches and Range Converters for receipt of the stop pulse. Start Delay blocks (1 to n) delay the receipt of the start pulse at Latches (1 to n) by a predetermined precise amount. The Range Converters (1 to n) are driven by the output of the Latches. The Latches are set upon the receipt of a start pulse to start the Range Converter. The receipt of a stop pulse resets the Latch causing the Range Converter to be turned off. The Range Converter performs a time integration and provides an output voltage proportional to the time between the start and stop pulse.

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Segmented Delay Meter

This system partitions the time to be measured into intervals that are not overlapping to provide an extremely accurate measuring means. As shown at A, a Stop Delay block provides the minimum time interval which must exist for the start pulse to condition the Latches and Range Converters for receipt of the stop pulse. Start Delay blocks (1 to n) delay the receipt of the start pulse at Latches (1 to n) by a predetermined precise amount. The Range Converters (1 to n) are driven by the output of the Latches. The Latches are set upon the receipt of a start pulse to start the Range Converter. The receipt of a stop pulse resets the Latch causing the Range Converter to be turned off. The Range Converter performs a time integration and provides an output voltage proportional to the time between the start and stop pulse. If the Range Converter reads over-range, it automatically switches the measurement to the next higher range. The Range Converter includes a peak detector and holds the peak voltage attained by the output of the time converter. The output of the peak detectors is then proportional to the time interval between the receipt of the start Pulse and the receipt of the stop pulse at the Latch.

The time interval, as shown at B, is then t(d) = (t(1)- t(2)) = A V + (t(ds)- t(d stop)) V is the output of the peak detectors. A is a constant of proportionality between time and voltage and will be specified by the specific electrical geometries chos...