JPS55112034A - Selection circuit - Google Patents

Selection circuit

Info

Publication number
JPS55112034A
JPS55112034A JP1950079A JP1950079A JPS55112034A JP S55112034 A JPS55112034 A JP S55112034A JP 1950079 A JP1950079 A JP 1950079A JP 1950079 A JP1950079 A JP 1950079A JP S55112034 A JPS55112034 A JP S55112034A
Authority
JP
Japan
Prior art keywords
gate
turned
transistor
switch
selection
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
JP1950079A
Other languages
Japanese (ja)
Inventor
Eiji Ito
Akira Suzuki
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP1950079A priority Critical patent/JPS55112034A/en
Publication of JPS55112034A publication Critical patent/JPS55112034A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors

Landscapes

  • Electronic Switches (AREA)

Abstract

PURPOSE:To minimize the number of control lines to just one and then secure transmission of the selection switch signal and the display signal, by returning the selection switch signal supplied via the control line to the input via the holding circuit. CONSTITUTION:When non-lock switch 21 is turned on, lamp 35 glows. At the same time, transistor 28 is turned off to turn the output of gate 30 into a low level. While the output of gate 31 forming the FF features a high level to turn transistor 34 on. Accordingly, lamp 35 glows continuously via transistor 34 although switch 21 is turned off, thus indicating that switch 21 has been selected. To release the selection, the reset pulse is applied to gate 32. As a result, only one piece of the control line suffices between terminals 22 and 23.
JP1950079A 1979-02-21 1979-02-21 Selection circuit Pending JPS55112034A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1950079A JPS55112034A (en) 1979-02-21 1979-02-21 Selection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1950079A JPS55112034A (en) 1979-02-21 1979-02-21 Selection circuit

Publications (1)

Publication Number Publication Date
JPS55112034A true JPS55112034A (en) 1980-08-29

Family

ID=12001084

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1950079A Pending JPS55112034A (en) 1979-02-21 1979-02-21 Selection circuit

Country Status (1)

Country Link
JP (1) JPS55112034A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5672528A (en) * 1979-11-16 1981-06-16 Nec Corp Control circuit of switcher

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5672528A (en) * 1979-11-16 1981-06-16 Nec Corp Control circuit of switcher
JPH0132690B2 (en) * 1979-11-16 1989-07-10 Nippon Electric Co

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