发明名称 DIGITAL TYPE CONTROLLER
摘要 <p>PURPOSE:To effect protection during interruption of service with the use of a simple construction by timely store in an outside memory the data which are necessary to be retained even during the interruption of service. CONSTITUTION:A digital controller receives input signals Vil to Vin from a multiplexer 1 to convert them into digital values with the use of an AD converter so that they are fed through an input port 3 into a digital operating portion 4 thereby to accomplish the preset operation. The resultant output is generated through the input port 3, a DA converter 5 and a multiplexer 6 thereby to control the process. The port 3 is connected with a CMOS RAM 8 of low capacity and power consumption so that the data to be retained during interruption of service are stored. Even in case the service of a system power source is interrupted, the power source of the RAM 8 is supplied from a capacitor C and is retained until the system restores.</p>
申请公布号 JPS5459579(A) 申请公布日期 1979.05.14
申请号 JP19770125098 申请日期 1977.10.20
申请人 HITACHI LTD 发明人 OOIZUMI JIYUNICHI;HIRAYAMA TAKESHI
分类号 G05B9/02;G05B15/02;G06F1/26;G06F1/30 主分类号 G05B9/02
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