JPS645221A - Switching controller - Google Patents

Switching controller

Info

Publication number
JPS645221A
JPS645221A JP16196087A JP16196087A JPS645221A JP S645221 A JPS645221 A JP S645221A JP 16196087 A JP16196087 A JP 16196087A JP 16196087 A JP16196087 A JP 16196087A JP S645221 A JPS645221 A JP S645221A
Authority
JP
Japan
Prior art keywords
signal
switching
switching signal
safety circuit
plural
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP16196087A
Other languages
Japanese (ja)
Inventor
Taku Mikoshiba
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kurita Water Industries Ltd
Original Assignee
Kurita Water Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kurita Water Industries Ltd filed Critical Kurita Water Industries Ltd
Priority to JP16196087A priority Critical patent/JPS645221A/en
Publication of JPS645221A publication Critical patent/JPS645221A/en
Pending legal-status Critical Current

Links

Landscapes

  • Electronic Switches (AREA)
  • Keying Circuit Devices (AREA)

Abstract

PURPOSE:To attain sure changeover even when a switching signal is missing or plural switching signals exist by processing the switching signal by a safety circuit means. CONSTITUTION:The titled device consists of a switching signal input means (a), a switching signal selection means (b) and a safety circuit means (c). Plural switching signals CH1-CH6 are inputted in parallel with the signal input means (a) in addition to the reset signal RESET. The signal selection means (b) consists of a NAND circuit NAND 1, AND circuits AND1-8, OR circuits OR1-7 and switch circuits SW1-SW6 and when one switching signal is selected, the transmission of other switching signals is inhibited. The safety circuit means (c) detects the highest high level H among 8 inputs at the pre-stage with an 8-bit encoder 1 outputting a signal corresponding thereto in a binary code and a decoder 2 at the post-stage and when no switching signal is given or plural switching signals exist at the same time, a predetermined switching signal is to be sent.
JP16196087A 1987-06-29 1987-06-29 Switching controller Pending JPS645221A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16196087A JPS645221A (en) 1987-06-29 1987-06-29 Switching controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16196087A JPS645221A (en) 1987-06-29 1987-06-29 Switching controller

Publications (1)

Publication Number Publication Date
JPS645221A true JPS645221A (en) 1989-01-10

Family

ID=15745340

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16196087A Pending JPS645221A (en) 1987-06-29 1987-06-29 Switching controller

Country Status (1)

Country Link
JP (1) JPS645221A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100358425B1 (en) * 1999-11-23 2002-10-25 삼성전자 주식회사 Electronic system for preventing failure during push operation of power switch and method of controlling power switch input signal
EP2277451A1 (en) 2007-04-06 2011-01-26 Aloka Co., Ltd. Ultrasound diagnostic apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100358425B1 (en) * 1999-11-23 2002-10-25 삼성전자 주식회사 Electronic system for preventing failure during push operation of power switch and method of controlling power switch input signal
EP2277451A1 (en) 2007-04-06 2011-01-26 Aloka Co., Ltd. Ultrasound diagnostic apparatus
EP2380497A1 (en) 2007-04-06 2011-10-26 Hitachi Aloka Medical, Ltd. Ultrasound diagnostic apparatus

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