Title:
PROGRAMMABLE INTEGRATED CIRCUIT DEVICE TO SUPPORT INDUCTIVE SENSING
Document Type and Number:
WIPO Patent Application WO/2010/042361
Kind Code:
A3
Abstract:
An integrated circuit device inductive touch analog front end excites selected ones of a plurality of inductive touch sensors and provides analog output signals representative of voltages across the coils of the plurality of inductive touch sensors. Various characteristics of the inductive touch analog front end are programmable, A digital processor controls selection of each one of the plurality of inductive touch sensors and receives the respective analog output voltage signal from the inductive touch AFE. The digital processor may program the characteristics of the inductive touch analog front end. When a sufficient change in the coil voltage is determined by the digital processor, that inductive touch sensor is assumed to have been actuated and the digital processor takes action based upon which one of the plurality of inductive touch sensors was actuated (touched).
Inventors:
STEEDMAN SEAN (US)
CURTIS KEITH E (US)
RUSCU RADU (RO)
POP PETRU CRISTIAN (RO)
CURTIS KEITH E (US)
RUSCU RADU (RO)
POP PETRU CRISTIAN (RO)
Application Number:
PCT/US2009/058979
Publication Date:
September 02, 2010
Filing Date:
September 30, 2009
Export Citation:
Assignee:
MICROCHIP TECH INC (US)
STEEDMAN SEAN (US)
CURTIS KEITH E (US)
RUSCU RADU (RO)
POP PETRU CRISTIAN (RO)
STEEDMAN SEAN (US)
CURTIS KEITH E (US)
RUSCU RADU (RO)
POP PETRU CRISTIAN (RO)
International Classes:
H03K17/96
Foreign References:
| EP0304272A2 | 1989-02-22 | |||
| US3944912A | 1976-03-16 | |||
| US5408132A | 1995-04-18 |
Other References:
SHEKHAR BHANSALI ET AL: "Prototype Feedback-Controlled Bidirectional Actuation System for MEMS Applications", JOURNAL OF MICROELECTROMECHANICAL SYSTEMS, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 9, no. 2, 1 June 2000 (2000-06-01), XP011034557, ISSN: 1057-7157
CASANELLA R ET AL: "Synchronous Demodulator for Autonomous Sensors", IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 56, no. 4, 1 August 2007 (2007-08-01), pages 1219 - 1223, XP011187921, ISSN: 0018-9456
JACOB FRADEN: "Handbook of Modern Sensors", 2004, SPRINGER-VERLAG, New York, US, ISBN: 0387007504, pages: 263 - 264, XP002564092
CASANELLA R ET AL: "Synchronous Demodulator for Autonomous Sensors", IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 56, no. 4, 1 August 2007 (2007-08-01), pages 1219 - 1223, XP011187921, ISSN: 0018-9456
JACOB FRADEN: "Handbook of Modern Sensors", 2004, SPRINGER-VERLAG, New York, US, ISBN: 0387007504, pages: 263 - 264, XP002564092
Attorney, Agent or Firm:
SLAYDEN, II, Bruce, W. (401 Congress Ave. Suite 3200Austin, TX, US)
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