Title:
VOLTAGE CONTROL CIRCUIT
Document Type and Number:
Japanese Patent JPS57199026
Kind Code:
A
Abstract:
PURPOSE:To prevent the malfunction of a voltage control circuit, by controlling the allowable level especially the lower limit level of the power supply voltage and at the same time detecting the fault of the ambient temperature. CONSTITUTION:The power supply voltage V-X is applied to a diode 1, a coil 2 and across a thermistor 3. When the voltage V-X has a fluctuation outside the lower limit of the allowable level, the current flowing to the coil 2 from the diode 1 is lowered suddenly. The driving energization of a magnetic reply switch 4 is lowered down to an open region. Thus a switch 4 is turned off. When the ambient temperature is higher than the upper limit level, the value of the current flowing to the coil 2 is lowered by the positive characteristics of the thermistor 3. As a result, the switch 4 is turned off.
Inventors:
NAKAMURA TAKASHI
TAKEDA KOUICHI
MATSUMOTO TOMOO
TAKEDA KOUICHI
MATSUMOTO TOMOO
Application Number:
JP8398781A
Publication Date:
December 06, 1982
Filing Date:
June 01, 1981
Export Citation:
Assignee:
FUJITSU LTD
International Classes:
G05F3/02; H02H11/00; (IPC1-7): G05F3/20
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