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Diode Drift Tester

IP.com Disclosure Number: IPCOM000098197D
Original Publication Date: 1960-Apr-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Brammer, FC: AUTHOR [+2]

Abstract

The metering arrangement automatically measures diode drift, the change in current flowing through diode at a given time. The diode 1 under test is connected in series to the coil 2 of a first meter or galvanometer so that the meter needle moves a distance proportional to the current flowing. At a given time, a relay operates to clamp the needle against a potentiometer corresponding to the scale of the meter.

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Diode Drift Tester

The metering arrangement automatically measures diode drift, the change in current flowing through diode at a given time. The diode 1 under test is connected in series to the coil 2 of a first meter or galvanometer so that the meter needle moves a distance proportional to the current flowing. At a given time, a relay operates to clamp the needle against a potentiometer corresponding to the scale of the meter.

After another interval, the diode 1 is placed in series with a coil 3 of a second meter whose needle is also clamped at a certain time against its corresponding potentiometer. The potentiometers have a common reference point and a potential difference is developed between the meter needles. This potential difference is proportional to the changing current (diode drift) and is measured by a third meter 4 which is connected across the two needles.

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