CIRCUIT FOR DETECTING POWER SUPPLY OFF

PURPOSE:To operate stably the circuit with less number of elements without providing a detecting terminal, by driving an IIL gate of the 2nd block operated normally with an output of the IIL gate whose input is opened and which is placed in the 1st block where power supply off may take place. CONSTI...

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Bibliographic Details
Main Authors KOBORI YASUNORI, OKAMOTO CHIKAYUKI, GOTOU KATSUHIKO
Format Patent
LanguageEnglish
Published 21.01.1984
Subjects
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
PULSE TECHNIQUE
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Summary:PURPOSE:To operate stably the circuit with less number of elements without providing a detecting terminal, by driving an IIL gate of the 2nd block operated normally with an output of the IIL gate whose input is opened and which is placed in the 1st block where power supply off may take place. CONSTITUTION:A transistor (TR) 35 turns on, because a current source 37 is in the on-state when a power supply is applied to the 1st block 29 of the IIL element. Then, an output of the IIL gate 33 is at L and the current from a current source 38 is not applied to a base of a TR36, resulting that the TR36 turns off, that is, the output of an IIL gate 34 is dependent on an input signal 25. The TR35 turns off, because the current source 37 is turned off, when the power supply 31 of the 1st block 29 is turned off. Thus, the current of the current source 38 is a base current of the TR36, which is turned on.
Bibliography:Application Number: JP19820118550