Electricity: measuring and testing – Plural – automatically sequential tests
Patent
1975-05-27
1977-08-09
Rolinec, Rudolph V.
Electricity: measuring and testing
Plural, automatically sequential tests
235153AC, 324 73AT, 307215, G01R 1512
Patent
active
040413845
ABSTRACT:
A test circuit for stimulating the inputs of preprogrammed logic circuits, having a pulse input terminal connected to one of the inputs of a NAND circuit. The output of the NAND circuit is connected via a first resistor to the base of a first switching PNP transistor, the emitter of which is connected to a first positive voltage supply terminal and the collector of which is connected to the collector of a second switching NPN transistor. The base of the second NPN transistor is connected both through a fourth resistor to an earth terminal of the circuit system and through a third resistor and a second resistor to a second positive voltage supply terminal and the emitter of which is connected both through a fifth resistor to the earth terminal of the circuit system and to an output terminal. The output terminal is connected to a measuring point or probe which is connected to the input of the connected-up logic circuit. The connected-up logic circuit is connected to the earth terminal of the test circuit system.
REFERENCES:
patent: 3657527 (1972-04-01), Kassabgi et al.
patent: 3673397 (1972-06-01), Schaefer
Hrdlicka Rehor
Kupec Jiri
Rolinec Rudolph V.
Sunderdick Vincent J.
Tesla, narodni podnik
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