FR2161969A1 - - Google Patents

Info

Publication number
FR2161969A1
FR2161969A1 FR7240418A FR7240418A FR2161969A1 FR 2161969 A1 FR2161969 A1 FR 2161969A1 FR 7240418 A FR7240418 A FR 7240418A FR 7240418 A FR7240418 A FR 7240418A FR 2161969 A1 FR2161969 A1 FR 2161969A1
Authority
FR
France
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
FR7240418A
Other languages
French (fr)
Other versions
FR2161969B1 (en
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of FR2161969A1 publication Critical patent/FR2161969A1/fr
Application granted granted Critical
Publication of FR2161969B1 publication Critical patent/FR2161969B1/fr
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)
FR7240418A 1971-11-30 1972-11-08 Expired FR2161969B1 (en)

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
FR2161969A1 true FR2161969A1 (en) 1973-07-13
FR2161969B1 FR2161969B1 (en) 1975-03-28

Family

ID=22753791

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7240418A Expired FR2161969B1 (en) 1971-11-30 1972-11-08

Country Status (4)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0187021A2 (en) * 1984-12-24 1986-07-09 AT&T Corp. Method and apparatus for capacitive keyboard scanning
EP0701258A1 (en) * 1994-09-12 1996-03-13 AT&T Corp. Integrated circuit memory device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5611144Y2 (en) * 1975-04-08 1981-03-13
JPH07109572B2 (en) * 1984-02-29 1995-11-22 東京プレス工業株式会社 Capacity keyboard
GB2168816A (en) * 1984-12-19 1986-06-25 Philips Electronic Associated Touch-sensitive position sensor apparatus

Citations (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
GB1185676A (en) * 1967-04-03 1970-03-25 Elektronische Rechenmasch Ind A Circuit Arrangement for a Contactless Keyboard

Patent Citations (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
GB1185676A (en) * 1967-04-03 1970-03-25 Elektronische Rechenmasch Ind A Circuit Arrangement for a Contactless Keyboard

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
(REVUE AMERICAINE "IBM TECHNICAL DISCLOSURE BULLETIN", VOLUME 14, NO. 11, AVRIL 1972, PAGES 3250-3251. ARTICLE "CAPACITANCE KEYBOARD ENCODING CIRCUITRY" PAR HANSON ET AUTRES.) *
REVUE AMERICAINE "IBM TECHNICAL DISCLOSURE BULLETIN", VOLUME 13, NO. 11,AVRIL 1971, PAGES 3303 A 3304. ARTICLE "VARIABLE THRESHOLD METHOD FOR ELIMINATION OF KEY BOUNCE" PAR FISHER ET PLESHKO . *
REVUE JAPONAISE "JAPAN ELECTRONIC ENGINEERING", NO. 50, JANVIER 1971, PAGES 39 A 42 ET 112. ARTICLE "PULSE KEY = A CONTACTLESS SWITCH BASED ON THE ELECTROMAGNETIC COUPLING EFFECT" PAR WADA ) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0187021A2 (en) * 1984-12-24 1986-07-09 AT&T Corp. Method and apparatus for capacitive keyboard scanning
EP0187021A3 (en) * 1984-12-24 1987-06-24 AT&T Corp. Method and apparatus for capacitive keyboard scanning
EP0701258A1 (en) * 1994-09-12 1996-03-13 AT&T Corp. Integrated circuit memory device

Also Published As

Publication number Publication date
FR2161969B1 (en) 1975-03-28
JPS5437457B2 (en) 1979-11-15
DE2247972A1 (en) 1973-06-07
GB1363778A (en) 1974-08-14
JPS4864838A (en) 1973-09-07

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Legal Events

Date Code Title Description
ST Notification of lapse