JPS4864838A - - Google Patents

Info

Publication number
JPS4864838A
JPS4864838A JP47099975A JP9997572A JPS4864838A JP S4864838 A JPS4864838 A JP S4864838A JP 47099975 A JP47099975 A JP 47099975A JP 9997572 A JP9997572 A JP 9997572A JP S4864838 A JPS4864838 A JP S4864838A
Authority
JP
Japan
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
JP47099975A
Other languages
Japanese (ja)
Other versions
JPS5437457B2 (enrdf_load_stackoverflow
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 filed Critical
Publication of JPS4864838A publication Critical patent/JPS4864838A/ja
Publication of JPS5437457B2 publication Critical patent/JPS5437457B2/ja
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C17/00—Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards
    • G11C17/04—Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards using capacitive elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/965—Switches controlled by moving an element forming part of the switch
    • H03K17/975—Switches controlled by moving an element forming part of the switch using a capacitive movable element
    • H03K17/98—Switches controlled by moving an element forming part of the switch using a capacitive movable element having a plurality of control members, e.g. keyboard

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Electronic Switches (AREA)
  • Amplifiers (AREA)
JP9997572A 1971-11-30 1972-10-06 Expired JPS5437457B2 (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US20339071A 1971-11-30 1971-11-30

Publications (2)

Publication Number Publication Date
JPS4864838A true JPS4864838A (enrdf_load_stackoverflow) 1973-09-07
JPS5437457B2 JPS5437457B2 (enrdf_load_stackoverflow) 1979-11-15

Family

ID=22753791

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9997572A Expired JPS5437457B2 (enrdf_load_stackoverflow) 1971-11-30 1972-10-06

Country Status (4)

Country Link
JP (1) JPS5437457B2 (enrdf_load_stackoverflow)
DE (1) DE2247972A1 (enrdf_load_stackoverflow)
FR (1) FR2161969B1 (enrdf_load_stackoverflow)
GB (1) GB1363778A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51131127U (enrdf_load_stackoverflow) * 1975-04-08 1976-10-22
US4772874A (en) * 1984-02-29 1988-09-20 Topre Corporation Keyboard apparatus

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2168816A (en) * 1984-12-19 1986-06-25 Philips Electronic Associated Touch-sensitive position sensor apparatus
US4651133A (en) * 1984-12-24 1987-03-17 At&T Technologies, Inc. Method and apparatus for capacitive keyboard scanning
US5499208A (en) * 1994-09-12 1996-03-12 At&T Corp. Integrated circuit memory device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3293640A (en) * 1964-05-22 1966-12-20 Chalfin Albert Electronic systems keyboard and switch matrix
US3437795A (en) * 1965-06-28 1969-04-08 Ampex Data input devices and systems
DE1549570A1 (de) * 1967-04-03 1971-03-04 Elektronische Rechenmasch Ind Schaltung fuer eine kontaktlose Tastatur,vorzugsweise fuer elektronische Rechenmaschinen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51131127U (enrdf_load_stackoverflow) * 1975-04-08 1976-10-22
US4772874A (en) * 1984-02-29 1988-09-20 Topre Corporation Keyboard apparatus

Also Published As

Publication number Publication date
FR2161969B1 (enrdf_load_stackoverflow) 1975-03-28
FR2161969A1 (enrdf_load_stackoverflow) 1973-07-13
DE2247972A1 (de) 1973-06-07
JPS5437457B2 (enrdf_load_stackoverflow) 1979-11-15
GB1363778A (en) 1974-08-14

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