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Ramp Coincidence Detector

IP.com Disclosure Number: IPCOM000098138D
Original Publication Date: 1960-Feb-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 20K

Publishing Venue

IBM

Related People

French, WK: AUTHOR

Abstract

The voltage comparator produces an output pulse when the value of a ramp voltage coincides with a DC value to be measured.

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Ramp Coincidence Detector

The voltage comparator produces an output pulse when the value of a ramp voltage coincides with a DC value to be measured.

Two back-to-back diodes 4 and 5 and a transformer 6 are serially connected between a ramp function generator output applied at terminal 2 and a DC voltage to be measured at terminal 3.

When the ramp voltage starts at a value less than the DC voltage, the current through the transformer 6 is steady at a value represented by portion 7 of the combined characteristic curve. As the ramp voltage approaches and passes coincidence with the DC voltage, the current through the transformer 6 changes as represented by the combined characteristic curve between the points 8 and 9. This change in current is detected by the transformer 6 which produces a pulse on coincidence. The pulse may be further amplified and shaped at 10 before being utilized at output terminal 1.

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