GB9924846D0 - Drive circuit - Google Patents

Drive circuit

Info

Publication number
GB9924846D0
GB9924846D0 GBGB9924846.0A GB9924846A GB9924846D0 GB 9924846 D0 GB9924846 D0 GB 9924846D0 GB 9924846 A GB9924846 A GB 9924846A GB 9924846 D0 GB9924846 D0 GB 9924846D0
Authority
GB
United Kingdom
Prior art keywords
excitation
sensor
stylus
pulse
winding
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.)
Ceased
Application number
GBGB9924846.0A
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.)
Absolute Sensors Ltd
Original Assignee
Absolute Sensors Ltd
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 Absolute Sensors Ltd filed Critical Absolute Sensors Ltd
Priority to GBGB9924846.0A priority Critical patent/GB9924846D0/en
Publication of GB9924846D0 publication Critical patent/GB9924846D0/en
Priority to GB0013882A priority patent/GB2355531B/en
Priority to EP00969688A priority patent/EP1236163B1/en
Priority to PCT/GB2000/004030 priority patent/WO2001029759A2/en
Priority to MXPA02003854A priority patent/MXPA02003854A/en
Priority to JP2001532479A priority patent/JP2003512682A/en
Priority to AT00969688T priority patent/ATE413639T1/en
Priority to CA002388201A priority patent/CA2388201A1/en
Priority to AU79344/00A priority patent/AU776407B2/en
Priority to DE60040758T priority patent/DE60040758D1/en
Priority to US09/776,908 priority patent/US7019672B2/en
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/046—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by electromagnetic means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
    • G06F3/03545—Pens or stylus

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Vehicle Body Suspensions (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Surgical Instruments (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

A position sensor includes a drive circuit 51 to apply and excitation pulse to an excitation winding 29. The decay time constant of the current loop formed by the excitation circuit and winding is longer in duration than the excitation pulse. The long decay time enables current to flow in the excitation winding for an amount of time after the pulse. This means shorter pulses, and hence less power, can be used. The sensor may be used in a x-y digitising tablet having a resonant stylus 41 which interacts with the excitation windings. Sensor windings 31, 33, 35, 37 may be located in the tablet or in the stylus which generate an output signal corresponding to the position of the stylus. The sensor may also be used behind the display of a hand-held electronic device such as a personal digital assistant (PDA), mobile telephone or web browser.
GBGB9924846.0A 1998-12-24 1999-10-20 Drive circuit Ceased GB9924846D0 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
GBGB9924846.0A GB9924846D0 (en) 1999-10-20 1999-10-20 Drive circuit
GB0013882A GB2355531B (en) 1999-10-20 2000-06-07 Position sensor
DE60040758T DE60040758D1 (en) 1999-10-20 2000-10-19 POSITION SENSOR
MXPA02003854A MXPA02003854A (en) 1999-10-20 2000-10-19 Position sensor.
PCT/GB2000/004030 WO2001029759A2 (en) 1999-10-20 2000-10-19 Position sensor
EP00969688A EP1236163B1 (en) 1999-10-20 2000-10-19 Position sensor
JP2001532479A JP2003512682A (en) 1999-10-20 2000-10-19 Position sensor
AT00969688T ATE413639T1 (en) 1999-10-20 2000-10-19 POSITION SENSOR
CA002388201A CA2388201A1 (en) 1999-10-20 2000-10-19 Position sensor
AU79344/00A AU776407B2 (en) 1999-10-20 2000-10-19 Position sensor
US09/776,908 US7019672B2 (en) 1998-12-24 2001-02-06 Position sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB9924846.0A GB9924846D0 (en) 1999-10-20 1999-10-20 Drive circuit

Publications (1)

Publication Number Publication Date
GB9924846D0 true GB9924846D0 (en) 1999-12-22

Family

ID=10863075

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB9924846.0A Ceased GB9924846D0 (en) 1998-12-24 1999-10-20 Drive circuit
GB0013882A Expired - Lifetime GB2355531B (en) 1998-12-24 2000-06-07 Position sensor

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB0013882A Expired - Lifetime GB2355531B (en) 1998-12-24 2000-06-07 Position sensor

Country Status (3)

Country Link
AT (1) ATE413639T1 (en)
DE (1) DE60040758D1 (en)
GB (2) GB9924846D0 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2403017A (en) * 2002-03-05 2004-12-22 Synaptics Position sensor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5066833A (en) * 1990-11-13 1991-11-19 Summagraphics Corporation Low power sensing apparatus for digitizer tablets
MXPA01005267A (en) * 1998-11-27 2002-04-24 Synaptics Uk Ltd Position sensor.

Also Published As

Publication number Publication date
GB0013882D0 (en) 2000-08-02
GB2355531B (en) 2004-03-17
GB2355531A (en) 2001-04-25
DE60040758D1 (en) 2008-12-18
ATE413639T1 (en) 2008-11-15

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Legal Events

Date Code Title Description
AT Applications terminated before publication under section 16(1)