DE69923343T2 - Verfahren und vorrichtung zur kalibrierung einer widerstandsleiterschaltmatrix - Google Patents

Verfahren und vorrichtung zur kalibrierung einer widerstandsleiterschaltmatrix Download PDF

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Publication number
DE69923343T2
DE69923343T2 DE69923343T DE69923343T DE69923343T2 DE 69923343 T2 DE69923343 T2 DE 69923343T2 DE 69923343 T DE69923343 T DE 69923343T DE 69923343 T DE69923343 T DE 69923343T DE 69923343 T2 DE69923343 T2 DE 69923343T2
Authority
DE
Germany
Prior art keywords
state
cover
voltage
calibration
calibration element
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 - Lifetime
Application number
DE69923343T
Other languages
German (de)
English (en)
Other versions
DE69923343D1 (de
Inventor
D. Daniel CLAXTON
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.)
Qualcomm Inc
Original Assignee
Qualcomm Inc
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 Qualcomm Inc filed Critical Qualcomm Inc
Application granted granted Critical
Publication of DE69923343D1 publication Critical patent/DE69923343D1/de
Publication of DE69923343T2 publication Critical patent/DE69923343T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • 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
    • H03M11/24—Static coding using analogue means, e.g. by coding the states of multiple switches into a single multi-level analogue signal or by indicating the type of a device using the voltage level at a specific tap of a resistive divider
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/0206—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings
    • H04M1/0208—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings characterized by the relative motions of the body parts
    • H04M1/0214—Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/0206—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings
    • H04M1/0241—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings using relative motion of the body parts to change the operational status of the telephone set, e.g. switching on/off, answering incoming call
    • H04M1/0245—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings using relative motion of the body parts to change the operational status of the telephone set, e.g. switching on/off, answering incoming call using open/close detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/23—Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephone Set Structure (AREA)
  • Push-Button Switches (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Transmitters (AREA)
  • Analogue/Digital Conversion (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Telephone Function (AREA)
DE69923343T 1998-11-13 1999-11-12 Verfahren und vorrichtung zur kalibrierung einer widerstandsleiterschaltmatrix Expired - Lifetime DE69923343T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US191200 1998-11-13
US09/191,200 US6178388B1 (en) 1998-11-13 1998-11-13 Method and apparatus for calibrating a resistive ladder switching matrix
PCT/US1999/026853 WO2000030263A1 (en) 1998-11-13 1999-11-12 Method and apparatus for calibrating a resistive ladder switching matrix

Publications (2)

Publication Number Publication Date
DE69923343D1 DE69923343D1 (de) 2005-02-24
DE69923343T2 true DE69923343T2 (de) 2006-05-04

Family

ID=22704516

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69923343T Expired - Lifetime DE69923343T2 (de) 1998-11-13 1999-11-12 Verfahren und vorrichtung zur kalibrierung einer widerstandsleiterschaltmatrix

Country Status (12)

Country Link
US (1) US6178388B1 (https=)
EP (1) EP1131891B1 (https=)
JP (1) JP4295924B2 (https=)
KR (1) KR20010080446A (https=)
CN (1) CN1168220C (https=)
AT (1) ATE287592T1 (https=)
AU (1) AU767291B2 (https=)
CA (1) CA2350579C (https=)
DE (1) DE69923343T2 (https=)
HK (1) HK1042599B (https=)
RU (1) RU2233539C2 (https=)
WO (1) WO2000030263A1 (https=)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE520689C2 (sv) * 1997-12-19 2003-08-12 Ericsson Telefon Ab L M Lock innefattande elekriska kalibreringsorgan, portabel anordning och sätt att tillverka ett lock
TW439366B (en) * 1999-11-19 2001-06-07 Darfon Electronics Corp Key scanning circuit
US6577250B1 (en) * 2000-05-19 2003-06-10 Microsoft Corporation Resistance based keyboard key discrimination
DE10044087A1 (de) * 2000-09-07 2002-04-04 Bosch Gmbh Robert Vorrichtung zur Aktivierung eines Steuergeräts
US6628216B2 (en) * 2002-02-13 2003-09-30 Intersil Americas Inc. Calibration of resistor ladder using difference measurement and parallel resistive correction
US8526950B2 (en) * 2003-12-30 2013-09-03 Nokia Corporation Determining handover based on state of mobile terminal
US7248195B2 (en) * 2005-11-30 2007-07-24 Symbol Technologies, Inc. Methods and apparatus for multiplexed digital inputs using an analog-to-digital converter
TWI307520B (en) * 2006-09-15 2009-03-11 Novatek Microelectronics Corp Key system utilizing two operation nodes to detect the status of a plurality of keys
JP4578451B2 (ja) * 2006-09-15 2010-11-10 京セラ株式会社 電子機器
US7639168B1 (en) * 2007-02-06 2009-12-29 Linear Technology Corporation Systems and methods for switch resistance control in digital to analog converters (DACs)
CN209218068U (zh) * 2015-12-31 2019-08-06 万思伴国际有限公司 包括线性键区的电子装置
RO132882A2 (ro) 2017-04-05 2018-10-30 Preh Gmbh Sistem şi metodă pentru citirea simultană a mai multor butoane sau senzori utilizând un singur pin analogic al unui microcontroler

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4015254A (en) * 1975-12-04 1977-03-29 General Motors Corporation Keyboard encoding circuit utilizing an A/D converter
US4118700A (en) * 1977-05-31 1978-10-03 Rca Corporation Single wire transmission of multiple switch operations
US4695840A (en) * 1985-09-03 1987-09-22 Mobil Oil Corporation Remote switch position determination using duty cycle modulation
US4884070A (en) * 1988-04-04 1989-11-28 California Institute Of Technology Method and apparatus for multiplexing switch signals
AT397311B (de) * 1991-08-16 1994-03-25 Hans Dr Leopold Verfahren zur bestimmung einer messgrösse sowie schaltungsanordnung zur durchführung des verfahrens
US5543588A (en) * 1992-06-08 1996-08-06 Synaptics, Incorporated Touch pad driven handheld computing device
US5510783A (en) * 1992-07-13 1996-04-23 Interlink Electronics, Inc. Adaptive keypad
DE4227149A1 (de) * 1992-08-17 1994-02-24 Hans Joachim Dr Ing Schuster Meßverfahren zur Ermittlung der Widerstandswerte ohmscher Widerstände, insbesondere Temperaturfühler
US5469364A (en) * 1993-03-15 1995-11-21 Hughey; Bradley W. Apparatus and methods for measuring and detecting variations in the value of a capacitor
US5515040A (en) * 1993-09-28 1996-05-07 Sejin Electron, Incorporated Methods of self-calibration for a key-type mouse
US5619196A (en) * 1995-12-28 1997-04-08 Universal Electronics Inc. Single wire keyboard encode and decode circuit
KR100203745B1 (ko) * 1996-05-27 1999-06-15 윤종용 에이디씨-키 패드 장치 및 그의 제어방법
US5900829A (en) * 1996-07-23 1999-05-04 Motorola, Inc. Method of and apparatus for detecting key actuations
US5798716A (en) * 1996-08-23 1998-08-25 Motorola, Inc. Method and apparatus for detecting key actuations
RU2121221C1 (ru) * 1996-09-27 1998-10-27 Государственное предприятие - Научно-исследовательский и проектно-конструкторский институт средств автоматизации на железнодорожном транспорте Кодирующее устройство для проверки систем телемеханики на сортировочных горках
FR2754399B1 (fr) * 1996-10-09 1998-12-04 Connexion Soc Nle Contacts tournants a effets auto-nettoyant
SE520689C2 (sv) * 1997-12-19 2003-08-12 Ericsson Telefon Ab L M Lock innefattande elekriska kalibreringsorgan, portabel anordning och sätt att tillverka ett lock

Also Published As

Publication number Publication date
US6178388B1 (en) 2001-01-23
JP2002530764A (ja) 2002-09-17
EP1131891A1 (en) 2001-09-12
CN1168220C (zh) 2004-09-22
KR20010080446A (ko) 2001-08-22
JP4295924B2 (ja) 2009-07-15
AU1620900A (en) 2000-06-05
CN1342344A (zh) 2002-03-27
HK1042599A1 (en) 2002-08-16
ATE287592T1 (de) 2005-02-15
EP1131891B1 (en) 2005-01-19
CA2350579A1 (en) 2000-05-25
CA2350579C (en) 2008-02-05
DE69923343D1 (de) 2005-02-24
HK1042599B (zh) 2005-05-20
WO2000030263A1 (en) 2000-05-25
RU2233539C2 (ru) 2004-07-27
AU767291B2 (en) 2003-11-06

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