JPS55115127A - Encode circuit for non-contact switch - Google Patents

Encode circuit for non-contact switch

Info

Publication number
JPS55115127A
JPS55115127A JP2137279A JP2137279A JPS55115127A JP S55115127 A JPS55115127 A JP S55115127A JP 2137279 A JP2137279 A JP 2137279A JP 2137279 A JP2137279 A JP 2137279A JP S55115127 A JPS55115127 A JP S55115127A
Authority
JP
Japan
Prior art keywords
key
strobe signal
input
delivery
contact switch
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.)
Granted
Application number
JP2137279A
Other languages
Japanese (ja)
Other versions
JPS5728127B2 (en
Inventor
Takao Matsubayashi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP2137279A priority Critical patent/JPS55115127A/en
Publication of JPS55115127A publication Critical patent/JPS55115127A/en
Publication of JPS5728127B2 publication Critical patent/JPS5728127B2/ja
Granted legal-status Critical Current

Links

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  • Input From Keyboards Or The Like (AREA)

Abstract

PURPOSE: To ensure the two key lockout, by comparing the input and output of the latch circuit, delivering the strobe signal if equal each other, and stopping the delivery of strobe signal after that.
CONSTITUTION: In encoding the depression key signal inputted via the non-contact switch, the key input is inputted to the PROM circuits 10 and 11 and the detection signal of depression key is outputted from the circuits 10 and 11, and the data code of program preset according to the key input is outputted via the latch circuit 14. The comparators 15 and 16 compare the input and output of the circuit 14 and if they are equal, the delivery of strobe signal after the delivery of strobe signal is stopped. Thus, the two key lockout can surely be made.
COPYRIGHT: (C)1980,JPO&Japio
JP2137279A 1979-02-27 1979-02-27 Encode circuit for non-contact switch Granted JPS55115127A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2137279A JPS55115127A (en) 1979-02-27 1979-02-27 Encode circuit for non-contact switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2137279A JPS55115127A (en) 1979-02-27 1979-02-27 Encode circuit for non-contact switch

Publications (2)

Publication Number Publication Date
JPS55115127A true JPS55115127A (en) 1980-09-04
JPS5728127B2 JPS5728127B2 (en) 1982-06-15

Family

ID=12053256

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2137279A Granted JPS55115127A (en) 1979-02-27 1979-02-27 Encode circuit for non-contact switch

Country Status (1)

Country Link
JP (1) JPS55115127A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5143911A (en) * 1974-10-12 1976-04-15 Nippon Telegraph & Telephone
JPS53135230A (en) * 1977-04-28 1978-11-25 Fujitsu Ltd Detection system for double keying of keyboard

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5143911A (en) * 1974-10-12 1976-04-15 Nippon Telegraph & Telephone
JPS53135230A (en) * 1977-04-28 1978-11-25 Fujitsu Ltd Detection system for double keying of keyboard

Also Published As

Publication number Publication date
JPS5728127B2 (en) 1982-06-15

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