JPS554110A - Control system - Google Patents

Control system

Info

Publication number
JPS554110A
JPS554110A JP7637878A JP7637878A JPS554110A JP S554110 A JPS554110 A JP S554110A JP 7637878 A JP7637878 A JP 7637878A JP 7637878 A JP7637878 A JP 7637878A JP S554110 A JPS554110 A JP S554110A
Authority
JP
Japan
Prior art keywords
control
voltage
states
make
digital system
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
JP7637878A
Other languages
Japanese (ja)
Inventor
Masao Yamazawa
Takao Moriya
Toyoji Nakazawa
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 JP7637878A priority Critical patent/JPS554110A/en
Publication of JPS554110A publication Critical patent/JPS554110A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/02—Electric signal transmission systems in which the signal transmitted is magnitude of current or voltage
    • G08C19/025—Electric signal transmission systems in which the signal transmitted is magnitude of current or voltage using fixed values of magnitude of current or voltage

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Selective Calling Equipment (AREA)

Abstract

PURPOSE:To make it possible to attain various control on a digital system, etc., by using fewer control lines by assigning several signal levels of external control signals corresponding to fixed operation modes or functions. CONSTITUTION:Analog control voltage V applied to terminal 2 is preset to four levels states of 0, 1, 2, and 3V, for example, which correspond to four different control states. The values of this voltage V are discriminated by comparators 7 to 9, whose outputs S1 to S3 are inputted to logic circuit 16 composed of gate circuits 12 to 15, so that one of output terminals 3 to 6 will be made logic ''1'' depending upon the value of voltage V. The digital system connected to this output terminal is supplied with a required control signal to make a required operation mode or function effective. In this way, the system can be controlled by indicating four states via one control line.
JP7637878A 1978-06-26 1978-06-26 Control system Pending JPS554110A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7637878A JPS554110A (en) 1978-06-26 1978-06-26 Control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7637878A JPS554110A (en) 1978-06-26 1978-06-26 Control system

Publications (1)

Publication Number Publication Date
JPS554110A true JPS554110A (en) 1980-01-12

Family

ID=13603666

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7637878A Pending JPS554110A (en) 1978-06-26 1978-06-26 Control system

Country Status (1)

Country Link
JP (1) JPS554110A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57197481A (en) * 1981-05-29 1982-12-03 Seiko Instr & Electronics Ltd Test circuit for ic
JPS5970391A (en) * 1982-10-15 1984-04-20 Tamura Electric Works Ltd Voltage signal discriminating system
US7880811B2 (en) 2005-08-31 2011-02-01 Fujitsu Limited Signal seperation circuit and signal transmission circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4887282A (en) * 1972-02-26 1973-11-16

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4887282A (en) * 1972-02-26 1973-11-16

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57197481A (en) * 1981-05-29 1982-12-03 Seiko Instr & Electronics Ltd Test circuit for ic
JPS5970391A (en) * 1982-10-15 1984-04-20 Tamura Electric Works Ltd Voltage signal discriminating system
US7880811B2 (en) 2005-08-31 2011-02-01 Fujitsu Limited Signal seperation circuit and signal transmission circuit

Similar Documents

Publication Publication Date Title
JPS5483341A (en) Digital integrated circuit
DE3275594D1 (en) Operation mode setting circuitry for microprocessor
JPS648465A (en) Tri-state bus circuit
EP0384429A3 (en) Programmable logic circuit
JPS57129536A (en) Variable logic device
JPS554110A (en) Control system
JPS57138220A (en) Data input equipment for logical circuit
JPS56116101A (en) Voltage comparator circuit
JPS6418314A (en) Logic circuit
JPS56115038A (en) Logic circuit
JPS57148479A (en) Apparatus controlling system
JPS5516512A (en) Coding circuit
JPS6420720A (en) Output buffer circuit
JPS56123073A (en) Bicolor picture signal deciding circuit
JPS5535574A (en) Logic device
SE8505870D0 (en) CIRCUIT
JPS5537924A (en) Integrated circuit
JPS57101430A (en) Termination resistor chip provided with tie-up means
JPS57145429A (en) Signal processing circuit
JPS56160049A (en) Mode change-over circuit
JPS57178542A (en) Integrated circuit
JPS57119523A (en) Programmable logic array
EP0308294A3 (en) Noise-resistant arbiter circuit
JPS5762627A (en) Analogue-digital converter
JPS56162539A (en) Signal-line driving circuit