HK1035269A1 - Method and circuit for differentiating between input ranges in a passive keypad. - Google Patents
Method and circuit for differentiating between input ranges in a passive keypad.Info
- Publication number
- HK1035269A1 HK1035269A1 HK01105876A HK01105876A HK1035269A1 HK 1035269 A1 HK1035269 A1 HK 1035269A1 HK 01105876 A HK01105876 A HK 01105876A HK 01105876 A HK01105876 A HK 01105876A HK 1035269 A1 HK1035269 A1 HK 1035269A1
- Authority
- HK
- Hong Kong
- Prior art keywords
- differentiating
- keypad
- passive
- circuit
- input ranges
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/002—Provisions or arrangements for saving power, e.g. by allowing a sleep mode, using lower supply voltage for downstream stages, using multiple clock domains or by selectively turning on stages when needed
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/18—Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging
- H03M1/186—Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging in feedforward mode, i.e. by determining the range to be selected directly from the input signal
- H03M1/187—Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging in feedforward mode, i.e. by determining the range to be selected directly from the input signal using an auxiliary analogue/digital converter
-
- 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
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
- H01H2300/022—Application wake up; switches or contacts specially provided for the wake up or standby shift of a circuit
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/34—Analogue value compared with reference values
- H03M1/36—Analogue value compared with reference values simultaneously only, i.e. parallel type
- H03M1/361—Analogue value compared with reference values simultaneously only, i.e. parallel type having a separate comparator and reference value for each quantisation level, i.e. full flash converter type
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Input From Keyboards Or The Like (AREA)
- Analogue/Digital Conversion (AREA)
- Electronic Switches (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US8363798A | 1998-05-22 | 1998-05-22 | |
PCT/US1999/011412 WO1999062180A1 (en) | 1998-05-22 | 1999-05-21 | Differentiating between input ranges in a passive keypad |
Publications (1)
Publication Number | Publication Date |
---|---|
HK1035269A1 true HK1035269A1 (en) | 2001-11-16 |
Family
ID=22179696
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
HK01105876A HK1035269A1 (en) | 1998-05-22 | 2001-08-21 | Method and circuit for differentiating between input ranges in a passive keypad. |
Country Status (12)
Country | Link |
---|---|
EP (1) | EP1086532B1 (xx) |
JP (2) | JP2002517119A (xx) |
KR (1) | KR100633209B1 (xx) |
CN (1) | CN1152472C (xx) |
AU (1) | AU764219B2 (xx) |
BR (1) | BR9910615A (xx) |
CA (1) | CA2333003C (xx) |
DE (1) | DE69920448T2 (xx) |
ES (1) | ES2229710T3 (xx) |
HK (1) | HK1035269A1 (xx) |
TW (1) | TW480830B (xx) |
WO (1) | WO1999062180A1 (xx) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6424274B1 (en) | 1999-04-13 | 2002-07-23 | Legerity, Inc. | Keypad scanning with few pins |
US6970752B1 (en) * | 2000-05-17 | 2005-11-29 | Hewlett-Packard Development Company, L.P. | Method and apparatus for detecting switch closures |
US7890284B2 (en) | 2002-06-24 | 2011-02-15 | Analog Devices, Inc. | Identification system and method for recognizing any one of a number of different types of devices |
US7783058B2 (en) | 2002-06-24 | 2010-08-24 | Analog Devices, Inc. | System for verifying the identification of a device |
US7912668B2 (en) | 2002-06-24 | 2011-03-22 | Analog Devices, Inc. | System for determining the true electrical characteristics of a device |
TWI230887B (en) | 2003-07-31 | 2005-04-11 | Htc Corp | Keyboard with a detection circuit for generating a control signal |
EP1521166B1 (en) | 2003-10-02 | 2013-02-20 | HTC Corporation | Keyboard |
US7030326B2 (en) * | 2003-12-30 | 2006-04-18 | Valeo Electrical Systems, Inc. | Digital wake-up signal from analog signal transition |
US7206952B2 (en) * | 2003-12-30 | 2007-04-17 | Valeo Electrical Systems, Inc. | Digital wake-up signal from switch transition of two analog signals |
JP4781006B2 (ja) * | 2005-05-02 | 2011-09-28 | キヤノン株式会社 | 電子機器 |
KR101503684B1 (ko) * | 2007-06-18 | 2015-03-19 | 삼성디스플레이 주식회사 | 타이밍 컨트롤러, 이를 포함하는 액정 표시 장치 및 액정표시 장치의 구동 방법 |
DE102007043865B4 (de) * | 2007-09-14 | 2011-06-16 | Giesecke & Devrient Gmbh | Eingabesperre |
CN103391085B (zh) * | 2012-05-10 | 2016-08-03 | 原相科技股份有限公司 | 共用一接脚以侦测多个按键的电路与方法及按键输入系统 |
GB2508612B (en) * | 2012-12-04 | 2015-12-09 | Cirrus Logic Int Semiconductor Ltd | Interpretation circuit for a switch unit comprising a plurality of register blocks |
TWI552034B (zh) | 2014-10-29 | 2016-10-01 | 原相科技股份有限公司 | 用來將滑鼠切換於不同偵測模式的校正電路 |
CN105589582B (zh) * | 2014-11-10 | 2018-04-10 | 原相科技股份有限公司 | 用来将鼠标切换于不同侦测模式的校正电路 |
US10529506B2 (en) | 2015-12-31 | 2020-01-07 | Onespan North America Inc. | Electronic apparatus comprising a linear keypad |
CN113285600B (zh) * | 2021-07-26 | 2021-11-05 | 广东伊之密精密机械股份有限公司 | 电压自适应电路及plc控制器 |
CN114362509B (zh) * | 2022-01-21 | 2024-05-14 | 珠海慧联科技有限公司 | 动态电压切换装置、tws芯片及tws设备 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5436455A (en) * | 1977-08-29 | 1979-03-17 | Hitachi Ltd | Data processing system |
JPS54144132A (en) * | 1978-05-02 | 1979-11-10 | Matsushita Electric Works Ltd | Number collation switch |
JPS58213330A (ja) * | 1982-06-07 | 1983-12-12 | Victor Co Of Japan Ltd | キ−入力判別装置 |
US5343200A (en) * | 1990-08-31 | 1994-08-30 | Canon Kabushiki Kaisha | Analog/digital converter with digital automatic gain control |
JPH05313803A (ja) * | 1992-05-01 | 1993-11-26 | Funai Electric Co Ltd | キースイッチ入力回路 |
JPH05327500A (ja) * | 1992-05-13 | 1993-12-10 | Nec Corp | A/d変換回路 |
DE4328663C1 (de) * | 1993-08-26 | 1994-06-09 | Grundig Emv | Einrichtung zur Abfrage von Bedienelementen |
JPH09244711A (ja) * | 1996-03-14 | 1997-09-19 | Advantest Corp | 多チャンネル制御装置 |
JP3381513B2 (ja) * | 1996-04-12 | 2003-03-04 | 三菱電機株式会社 | スイッチ回路 |
-
1999
- 1999-05-21 BR BR9910615-9A patent/BR9910615A/pt not_active Application Discontinuation
- 1999-05-21 JP JP2000551485A patent/JP2002517119A/ja not_active Withdrawn
- 1999-05-21 KR KR1020007013139A patent/KR100633209B1/ko not_active IP Right Cessation
- 1999-05-21 AU AU40960/99A patent/AU764219B2/en not_active Ceased
- 1999-05-21 WO PCT/US1999/011412 patent/WO1999062180A1/en active IP Right Grant
- 1999-05-21 CA CA002333003A patent/CA2333003C/en not_active Expired - Fee Related
- 1999-05-21 DE DE69920448T patent/DE69920448T2/de not_active Expired - Lifetime
- 1999-05-21 CN CNB998064475A patent/CN1152472C/zh not_active Expired - Fee Related
- 1999-05-21 ES ES99924471T patent/ES2229710T3/es not_active Expired - Lifetime
- 1999-05-21 EP EP99924471A patent/EP1086532B1/en not_active Expired - Lifetime
-
2001
- 2001-02-19 TW TW088108377A patent/TW480830B/zh not_active IP Right Cessation
- 2001-08-21 HK HK01105876A patent/HK1035269A1/xx not_active IP Right Cessation
-
2009
- 2009-09-14 JP JP2009211707A patent/JP2010081601A/ja not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
CN1152472C (zh) | 2004-06-02 |
JP2010081601A (ja) | 2010-04-08 |
DE69920448D1 (de) | 2004-10-28 |
BR9910615A (pt) | 2001-10-02 |
WO1999062180A1 (en) | 1999-12-02 |
JP2002517119A (ja) | 2002-06-11 |
DE69920448T2 (de) | 2005-09-22 |
CN1302478A (zh) | 2001-07-04 |
KR100633209B1 (ko) | 2006-10-11 |
EP1086532A1 (en) | 2001-03-28 |
CA2333003C (en) | 2008-01-08 |
TW480830B (en) | 2002-03-21 |
CA2333003A1 (en) | 1999-12-02 |
AU4096099A (en) | 1999-12-13 |
EP1086532B1 (en) | 2004-09-22 |
AU764219B2 (en) | 2003-08-14 |
KR20010043761A (ko) | 2001-05-25 |
ES2229710T3 (es) | 2005-04-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PC | Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee) |
Effective date: 20110521 |