Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1975-03-13
1977-03-01
Rolinec, Rudolph V.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
324183, 324186, G01R 3126
Patent
active
040104184
ABSTRACT:
A circuit and method for indicating the rise time in switching a transistor on, and the fall time in switching the transistor off. A voltage is produced indicative of the transistor collector current and this voltage is compared with first and second reference voltage levels indicative of 10% and 90% of the maximum collector current. To measure rise time, a pulse counter is started when the 10% level is reached and stopped when the 90% level is reached. To measure fall time, a second pulse counter is started when the 90% level is reached and stopped when the 10% level is reached.
REFERENCES:
patent: 3286180 (1966-11-01), Hubbs
patent: 3359491 (1967-12-01), McCutcheon
Christoffersen H.
Cohen Samuel
Karlsen Ernest F.
RCA Corporation
Rolinec Rudolph V.
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