JP2002530764A5 - - Google Patents

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Publication number
JP2002530764A5
JP2002530764A5 JP2000583169A JP2000583169A JP2002530764A5 JP 2002530764 A5 JP2002530764 A5 JP 2002530764A5 JP 2000583169 A JP2000583169 A JP 2000583169A JP 2000583169 A JP2000583169 A JP 2000583169A JP 2002530764 A5 JP2002530764 A5 JP 2002530764A5
Authority
JP
Japan
Prior art keywords
resistance
cover
keypad
calibration element
calibration
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.)
Granted
Application number
JP2000583169A
Other languages
English (en)
Japanese (ja)
Other versions
JP2002530764A (ja
JP4295924B2 (ja
Filing date
Publication date
Priority claimed from US09/191,200 external-priority patent/US6178388B1/en
Application filed filed Critical
Publication of JP2002530764A publication Critical patent/JP2002530764A/ja
Publication of JP2002530764A5 publication Critical patent/JP2002530764A5/ja
Application granted granted Critical
Publication of JP4295924B2 publication Critical patent/JP4295924B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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JP2000583169A 1998-11-13 1999-11-12 抵抗梯子スイッチングマトリクスをキャリブレートする方法および装置 Expired - Fee Related JP4295924B2 (ja)

Applications Claiming Priority (3)

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

Publications (3)

Publication Number Publication Date
JP2002530764A JP2002530764A (ja) 2002-09-17
JP2002530764A5 true JP2002530764A5 (2) 2007-12-13
JP4295924B2 JP4295924B2 (ja) 2009-07-15

Family

ID=22704516

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000583169A Expired - Fee Related JP4295924B2 (ja) 1998-11-13 1999-11-12 抵抗梯子スイッチングマトリクスをキャリブレートする方法および装置

Country Status (12)

Country Link
US (1) US6178388B1 (2)
EP (1) EP1131891B1 (2)
JP (1) JP4295924B2 (2)
KR (1) KR20010080446A (2)
CN (1) CN1168220C (2)
AT (1) ATE287592T1 (2)
AU (1) AU767291B2 (2)
CA (1) CA2350579C (2)
DE (1) DE69923343T2 (2)
HK (1) HK1042599B (2)
RU (1) RU2233539C2 (2)
WO (1) WO2000030263A1 (2)

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
JP4578451B2 (ja) * 2006-09-15 2010-11-10 京セラ株式会社 電子機器
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
US7639168B1 (en) * 2007-02-06 2009-12-29 Linear Technology Corporation Systems and methods for switch resistance control in digital to analog converters (DACs)
US10529506B2 (en) 2015-12-31 2020-01-07 Onespan North America Inc. Electronic apparatus comprising a linear keypad
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

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