Author - Michael Gambuzza

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Michael Gambuzza	Write for Electronic Design

3 results found for Michael Gambuzza, displaying items 1 - 3

November 16, 2009 [Ideas For Design]
Diode Tester Limits Reverse Voltage And Forward Current To Protect Sensitive Junctions
Some diode manufacturers caution against using the diode tester function in ohmmeters because it could exceed the reverse-voltage and forward-current ratings of sensitive diodes. This is especially true in optical devices such as photodiodes and laser diodes. However, the circuit described here performs a simple go/no-go test on these diodes while limiting forward current and reverse voltage to safe levels (...

February 18, 2002 [Ideas For Design]
Detect Loop-Reverse Battery Conditions On A Telephone Line
Equipment connected to the public switched-telephone network (PSTN) sometimes needs to detect polarity reversals of the battery feed. One common application is the Direct-Inward-Dialing (DID) service that uses what is termed as "loop-reverse battery...

November 20, 2000 [Ideas For Design]
Circuit Provides Ground-Start Supervision For Phone Switching
Ground start is the primary analog signaling method used between telephone switches such as the central office (CO) and a private branch exchange (PBX). It offers a way to indicate on-hook and off-hook conditions in a voice network. There’s one...

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