JPS56108130A - Switch circuit - Google Patents

Switch circuit

Info

Publication number
JPS56108130A
JPS56108130A JP1160580A JP1160580A JPS56108130A JP S56108130 A JPS56108130 A JP S56108130A JP 1160580 A JP1160580 A JP 1160580A JP 1160580 A JP1160580 A JP 1160580A JP S56108130 A JPS56108130 A JP S56108130A
Authority
JP
Japan
Prior art keywords
output
signal lines
lines
circuit
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.)
Pending
Application number
JP1160580A
Other languages
Japanese (ja)
Inventor
Jihei Shiotani
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 General Ltd
Gen Co Ltd
Original Assignee
Fujitsu General Ltd
Gen Co 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 General Ltd, Gen Co Ltd filed Critical Fujitsu General Ltd
Priority to JP1160580A priority Critical patent/JPS56108130A/en
Publication of JPS56108130A publication Critical patent/JPS56108130A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials

Abstract

PURPOSE:To provide a number of key switches with a limited number of signal lines, by installing several groups of switches formed into a matrix with a common use secured among the input signal lines for each switch group and then securing a parallel connection among the output signal lines via a reverse current blocking circuit. CONSTITUTION:It is supposed that the scan signals of different timings are sent to the input signal lines 1, 2 and 3. Then the key switch S22 of the switch group 20 is pushed. Thus the scan signal of the input signal line 2 is delivered only to the output signal line 5 among the output signal lines 4, 5 and 6. At the same time, only the output of the OR circuit 25 in the switch group identifying circuit 28 becomes ''1'' with push of the switch S22 of the group 20. As a result, the signal is sent only to the line 30 among the output signal lines 29, 30, 31 and 32 in the circuit 28. Then the outputs of the lines 29-32 are supplied to the encoder 33, and the output of the encoder is obtained through the output lines 11 and 12.
JP1160580A 1980-01-31 1980-01-31 Switch circuit Pending JPS56108130A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1160580A JPS56108130A (en) 1980-01-31 1980-01-31 Switch circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1160580A JPS56108130A (en) 1980-01-31 1980-01-31 Switch circuit

Publications (1)

Publication Number Publication Date
JPS56108130A true JPS56108130A (en) 1981-08-27

Family

ID=11782530

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1160580A Pending JPS56108130A (en) 1980-01-31 1980-01-31 Switch circuit

Country Status (1)

Country Link
JP (1) JPS56108130A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5890431U (en) * 1981-12-11 1983-06-18 株式会社アドバンテスト input device
JPS59128718A (en) * 1983-01-13 1984-07-24 株式会社東海理化電機製作所 Matrix switch
JPS6312224U (en) * 1987-06-24 1988-01-27
JPH01173121A (en) * 1987-12-28 1989-07-07 Matsushita Electric Ind Co Ltd Data input device
JPH01220515A (en) * 1988-02-26 1989-09-04 Matsushita Electric Ind Co Ltd Key matrix device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5890431U (en) * 1981-12-11 1983-06-18 株式会社アドバンテスト input device
JPS59128718A (en) * 1983-01-13 1984-07-24 株式会社東海理化電機製作所 Matrix switch
JPS6312224U (en) * 1987-06-24 1988-01-27
JPH01173121A (en) * 1987-12-28 1989-07-07 Matsushita Electric Ind Co Ltd Data input device
JPH01220515A (en) * 1988-02-26 1989-09-04 Matsushita Electric Ind Co Ltd Key matrix device

Similar Documents

Publication Publication Date Title
JPS55100741A (en) Multi-input comparator
MY112568A (en) Testing sequential logic circuit upon changing into combinatorial logic circuit
TW350166B (en) Multiple synchroneous delay circuit
JPS56108130A (en) Switch circuit
JPS5487011A (en) Telautogram information transmitting device
JPS53126216A (en) Key input circuit
JPS56116101A (en) Voltage comparator circuit
JPS5730427A (en) Signal automatic switching circuit
JPS544047A (en) Switching circuit
ATE145504T1 (en) CIRCUIT ARRANGEMENT FOR INQUIRING A KEYBOARD
JPS53142825A (en) Keyboard display system
JPS56168478A (en) Switching device of multiplex broadcasting
JPS53103338A (en) Large-scale integrated circuit
JPS53138640A (en) Power source throw-in system
JPS5511624A (en) Holding device of multiple selection signal
JPS5725744A (en) Interleaving circuit
JPS51138107A (en) Signal detection output system
JPS5592928A (en) Keyboard unit
JPS57203320A (en) Sequence deciding circuit
JPS5441649A (en) Automatic transaction processing system
JPS53145516A (en) Video signal switching system
JPS5285454A (en) Key input circuit
JPS5391531A (en) Character input system
JPS57211864A (en) Sending system for message waiting signal
JPS5793757A (en) Common control code converting circuit