FR2138053B1 - - Google Patents

Info

Publication number
FR2138053B1
FR2138053B1 FR727217688A FR7217688A FR2138053B1 FR 2138053 B1 FR2138053 B1 FR 2138053B1 FR 727217688 A FR727217688 A FR 727217688A FR 7217688 A FR7217688 A FR 7217688A FR 2138053 B1 FR2138053 B1 FR 2138053B1
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.)
Expired
Application number
FR727217688A
Other versions
FR2138053A1 (fr
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.)
RCA Corp
Original Assignee
RCA 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 RCA Corp filed Critical RCA Corp
Publication of FR2138053A1 publication Critical patent/FR2138053A1/fr
Application granted granted Critical
Publication of FR2138053B1 publication Critical patent/FR2138053B1/fr
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

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Input From Keyboards Or The Like (AREA)
FR727217688A 1971-05-17 1972-05-17 Expired FR2138053B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US14386071A 1971-05-17 1971-05-17

Publications (2)

Publication Number Publication Date
FR2138053A1 FR2138053A1 (fr) 1972-12-29
FR2138053B1 true FR2138053B1 (fr) 1973-07-13

Family

ID=22505980

Family Applications (1)

Application Number Title Priority Date Filing Date
FR727217688A Expired FR2138053B1 (fr) 1971-05-17 1972-05-17

Country Status (7)

Country Link
US (1) US3778815A (fr)
CA (1) CA952033A (fr)
DE (1) DE2224140B2 (fr)
FR (1) FR2138053B1 (fr)
GB (1) GB1388143A (fr)
IT (1) IT955525B (fr)
SE (1) SE371510B (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS536817B2 (fr) * 1972-04-04 1978-03-11
JPS5319374B2 (fr) * 1973-04-03 1978-06-20
JPS5086929A (fr) * 1973-11-30 1975-07-12
US4419769A (en) * 1976-03-08 1983-12-06 General Instrument Corporation Digital tuning system for a varactor tuner employing feedback means for improved tuning accuracy
US4157539A (en) * 1976-10-14 1979-06-05 The Singer Company Charge rate, capacitive switch system
US4326194A (en) * 1979-04-16 1982-04-20 The Singer Company Dual encoded switching matrix
JPS607808B2 (ja) * 1979-08-24 1985-02-27 株式会社東芝 キ−入力回路
US4667181A (en) * 1983-07-15 1987-05-19 Honeywell Inc. Keyboard data input assembly
US4673933A (en) * 1983-11-14 1987-06-16 American Microsystems, Inc. Switch matrix encoding interface using common input/output parts
US5189629A (en) * 1990-06-06 1993-02-23 Hughes Aircraft Company Method of logic gate reduction in a logic gate array
SE508136C2 (sv) 1996-12-19 1998-08-31 Ericsson Telefon Ab L M Anordning och förfarande för tangentbordsavläsning

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2610243A (en) * 1951-04-06 1952-09-09 Monroe Calculating Machine Keyboard operated translating circuit
US3307148A (en) * 1962-04-16 1967-02-28 Nippon Electric Co Plural matrix decoding circuit
US3541547A (en) * 1968-03-15 1970-11-17 Ibm Code converter

Also Published As

Publication number Publication date
US3778815A (en) 1973-12-11
CA952033A (en) 1974-07-30
DE2224140C3 (fr) 1974-11-28
SE371510B (fr) 1974-11-18
GB1388143A (en) 1975-03-26
FR2138053A1 (fr) 1972-12-29
DE2224140B2 (de) 1974-02-14
IT955525B (it) 1973-09-29
DE2224140A1 (de) 1972-11-30

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Legal Events

Date Code Title Description
ST Notification of lapse