GB1320479A - Data input key apparatus - Google Patents

Data input key apparatus

Info

Publication number
GB1320479A
GB1320479A GB495872A GB495872A GB1320479A GB 1320479 A GB1320479 A GB 1320479A GB 495872 A GB495872 A GB 495872A GB 495872 A GB495872 A GB 495872A GB 1320479 A GB1320479 A GB 1320479A
Authority
GB
United Kingdom
Prior art keywords
fet
key
electret
transducer
output
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.)
Expired
Application number
GB495872A
Other languages
English (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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Publication of GB1320479A publication Critical patent/GB1320479A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M11/00—Coding in connection with keyboards or like devices, i.e. coding of the position of operated keys
    • H03M11/22—Static coding
    • 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

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Electronic Switches (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
GB495872A 1971-02-04 1972-02-02 Data input key apparatus Expired GB1320479A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46004332A JPS5217377B1 (enExample) 1971-02-04 1971-02-04

Publications (1)

Publication Number Publication Date
GB1320479A true GB1320479A (en) 1973-06-13

Family

ID=11581480

Family Applications (1)

Application Number Title Priority Date Filing Date
GB495872A Expired GB1320479A (en) 1971-02-04 1972-02-02 Data input key apparatus

Country Status (8)

Country Link
US (1) US3740744A (enExample)
JP (1) JPS5217377B1 (enExample)
CA (1) CA948996A (enExample)
DE (1) DE2205138C3 (enExample)
ES (1) ES399444A1 (enExample)
FR (1) FR2124518B1 (enExample)
GB (1) GB1320479A (enExample)
NL (1) NL169526C (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4251805A (en) * 1977-12-17 1981-02-17 Itt Industries, Inc. Circuit arrangement for an input keyboard

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3984757A (en) * 1973-01-05 1976-10-05 Gott Daniel A Proximity actuated power control variable as to sense and magnitude
US4144580A (en) * 1974-09-03 1979-03-13 Canon Kabushiki Kaisha Electronic apparatus incorporating a power savings feature
US4264072A (en) * 1978-05-26 1981-04-28 Chalmers John E Electronic game apparatus
FR2455818A1 (fr) * 1979-05-04 1980-11-28 Lewiner Jacques Perfectionnements aux dispositifs pour exploiter les variations de charge d'un condensateur de faible capacite contenant un dielectrique charge
US4275383A (en) * 1979-09-28 1981-06-23 White Roland A Patient signalling system
US4414538A (en) * 1981-12-07 1983-11-08 Teletype Corporation Keyboard sense gate
US4438356A (en) 1982-03-24 1984-03-20 International Rectifier Corporation Solid state relay circuit employing MOSFET power switching devices
JPS60501898A (ja) * 1983-07-26 1985-11-07 シユボウ　カルヴイン 結合された凝集体構造及びその製造法
GB2232251A (en) * 1989-05-08 1990-12-05 Philips Electronic Associated Touch sensor array systems
JP3939366B2 (ja) * 1992-12-09 2007-07-04 松下電器産業株式会社 キーボード入力装置
US7023215B2 (en) * 2003-04-22 2006-04-04 Touchsensor Technologies Llc Field effect sensor two wire interconnect method and apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3676607A (en) * 1969-11-25 1972-07-11 Bell Telephone Labor Inc Pushbutton telephone dial
US3668698A (en) * 1970-12-17 1972-06-06 Northern Electric Co Capacitive transducer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4251805A (en) * 1977-12-17 1981-02-17 Itt Industries, Inc. Circuit arrangement for an input keyboard

Also Published As

Publication number Publication date
DE2205138C3 (de) 1981-09-17
FR2124518B1 (enExample) 1978-02-24
DE2205138B2 (de) 1980-11-20
DE2205138A1 (de) 1972-08-10
CA948996A (en) 1974-06-11
NL7201397A (enExample) 1972-08-08
FR2124518A1 (enExample) 1972-09-22
ES399444A1 (es) 1975-06-01
JPS5217377B1 (enExample) 1977-05-14
US3740744A (en) 1973-06-19
NL169526B (nl) 1982-02-16
NL169526C (nl) 1982-07-16

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee