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FR2271538A1 - Capacitive proximity detector or switch - detects effective capacitance of object and activates logic circuit - Google Patents

Capacitive proximity detector or switch - detects effective capacitance of object and activates logic circuit

Info

Publication number
FR2271538A1
FR2271538A1 FR7346455A FR7346455A FR2271538A1 FR 2271538 A1 FR2271538 A1 FR 2271538A1 FR 7346455 A FR7346455 A FR 7346455A FR 7346455 A FR7346455 A FR 7346455A FR 2271538 A1 FR2271538 A1 FR 2271538A1
Authority
FR
France
Prior art keywords
logic circuit
effective capacitance
switch
resistor
proximity detector
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
FR7346455A
Other languages
French (fr)
Other versions
FR2271538B1 (en
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.)
INFORMATIQUE CIE INTERNATIONALE FR
Original Assignee
INFORMATIQUE CIE INTERNATIONALE FR
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 INFORMATIQUE CIE INTERNATIONALE FR filed Critical INFORMATIQUE CIE INTERNATIONALE FR
Priority to FR7346455A priority Critical patent/FR2271538A1/en
Publication of FR2271538A1 publication Critical patent/FR2271538A1/en
Application granted granted Critical
Publication of FR2271538B1 publication Critical patent/FR2271538B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/945—Proximity switches
    • H03K17/955—Proximity switches using a capacitive detector
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/96—Touch switches
    • H03K2217/9607—Capacitive touch switches
    • H03K2217/960755—Constructional details of capacitive touch and proximity switches
    • H03K2217/960765—Details of shielding arrangements

Landscapes

  • Electronic Switches (AREA)

Abstract

An electronic switch (3) is made-up of a bipolar transistor whose collector is supplied by a positive voltage from a battery (9) and a resistor (8). A logic circuit (10) connected to the resistor (8) can be a device generating pulses or a memory device. The base of the transistor (3) is connected to one of the armatures of a proximity capacitor (1). A pulse source (5) is connected, through a resistor (6), to the emitter of the transistor (3). A diode (7) is used to leave only the negative pulses. When an electrically conductive object connected to earth, such as one finger of a hand, is presented to the armature (1) of the proximity capacitor, the effective capacitance (25) of the object is used to operate the electronic switch (3) and activate the logic circuit (10).
FR7346455A 1973-12-27 1973-12-27 Capacitive proximity detector or switch - detects effective capacitance of object and activates logic circuit Granted FR2271538A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7346455A FR2271538A1 (en) 1973-12-27 1973-12-27 Capacitive proximity detector or switch - detects effective capacitance of object and activates logic circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7346455A FR2271538A1 (en) 1973-12-27 1973-12-27 Capacitive proximity detector or switch - detects effective capacitance of object and activates logic circuit

Publications (2)

Publication Number Publication Date
FR2271538A1 true FR2271538A1 (en) 1975-12-12
FR2271538B1 FR2271538B1 (en) 1976-10-08

Family

ID=9129733

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7346455A Granted FR2271538A1 (en) 1973-12-27 1973-12-27 Capacitive proximity detector or switch - detects effective capacitance of object and activates logic circuit

Country Status (1)

Country Link
FR (1) FR2271538A1 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985003820A1 (en) * 1984-02-16 1985-08-29 Antikidis Jean Pierre Method for scanning a keyboard with capacitive keys and keyboard provided with means for scanning a keyboard according to this method
FR2577365A2 (en) * 1985-02-11 1986-08-14 Antikidis Jean Pierre Method of investigating a keyboard with capacitive keys and keyboard combined with means of investigating this keyboard according to this method
WO1987004851A1 (en) * 1986-01-30 1987-08-13 Intellect Electronics Ltd. Proximity sensing device
US4924222A (en) * 1984-02-16 1990-05-08 Antikidis Jean Pierre Capacitive keyboard operable through a thick dielectric wall
AU602652B2 (en) * 1986-01-30 1990-10-25 Intellect Australia Pty Ltd Proximity sensing device
EP0723166A1 (en) * 1995-01-18 1996-07-24 Carlo Gavazzi AG Capacitive sensor
DE19817640A1 (en) * 1998-04-21 1999-11-04 Gerhard Von Der Emde Underwater detector for capacitive object properties
LU90265B1 (en) * 1998-07-22 2000-01-24 Iee Sarl Connection device for shielded surface electrode
EP1160400A1 (en) * 2000-06-02 2001-12-05 Delphi Technologies, Inc. Switching device operating by contact of human body
EP1198063A1 (en) * 2000-10-11 2002-04-17 DREEFS GmbH Schaltgeräte und Systeme Capacitive approximation sensor
WO2005071361A1 (en) * 2004-01-21 2005-08-04 Dieter Peter Device and method for capacitive detection of measured values
DE102006005581A1 (en) * 2006-02-06 2007-08-09 Diehl Ako Stiftung & Co. Kg Capacitive touch switch
DE102005001777B4 (en) * 2004-12-22 2007-09-13 Diehl Ako Stiftung & Co. Kg Circuit arrangement for a capacitive touch switch
CN1705232B (en) * 2004-06-03 2010-05-05 艾勒博科技股份有限公司 Electric contact sensor and man-machine interface device using the same

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985003820A1 (en) * 1984-02-16 1985-08-29 Antikidis Jean Pierre Method for scanning a keyboard with capacitive keys and keyboard provided with means for scanning a keyboard according to this method
US4924222A (en) * 1984-02-16 1990-05-08 Antikidis Jean Pierre Capacitive keyboard operable through a thick dielectric wall
FR2577365A2 (en) * 1985-02-11 1986-08-14 Antikidis Jean Pierre Method of investigating a keyboard with capacitive keys and keyboard combined with means of investigating this keyboard according to this method
WO1987004851A1 (en) * 1986-01-30 1987-08-13 Intellect Electronics Ltd. Proximity sensing device
AU602652B2 (en) * 1986-01-30 1990-10-25 Intellect Australia Pty Ltd Proximity sensing device
US5063306A (en) * 1986-01-30 1991-11-05 Intellect Electronics Ltd. Proximity sensing device
EP0723166A1 (en) * 1995-01-18 1996-07-24 Carlo Gavazzi AG Capacitive sensor
DE19817640A1 (en) * 1998-04-21 1999-11-04 Gerhard Von Der Emde Underwater detector for capacitive object properties
LU90265B1 (en) * 1998-07-22 2000-01-24 Iee Sarl Connection device for shielded surface electrode
WO2000005817A1 (en) * 1998-07-22 2000-02-03 I.E.E. International Electronics & Engineering Sarl Connection device for a screened surface electrode
EP1160400A1 (en) * 2000-06-02 2001-12-05 Delphi Technologies, Inc. Switching device operating by contact of human body
FR2809885A1 (en) * 2000-06-02 2001-12-07 Eaton Corp SWITCHING DEVICE OPERATING BY CONTACT OF A HUMAN BODY
EP1198063A1 (en) * 2000-10-11 2002-04-17 DREEFS GmbH Schaltgeräte und Systeme Capacitive approximation sensor
WO2005071361A1 (en) * 2004-01-21 2005-08-04 Dieter Peter Device and method for capacitive detection of measured values
DE102004003112A1 (en) * 2004-01-21 2005-08-25 Dieter Peter Device and method for capacitive measured value acquisition
DE102004003112B4 (en) * 2004-01-21 2005-12-22 Dieter Peter Device and method for capacitive measured value acquisition
CN1705232B (en) * 2004-06-03 2010-05-05 艾勒博科技股份有限公司 Electric contact sensor and man-machine interface device using the same
DE102005001777B4 (en) * 2004-12-22 2007-09-13 Diehl Ako Stiftung & Co. Kg Circuit arrangement for a capacitive touch switch
DE102006005581A1 (en) * 2006-02-06 2007-08-09 Diehl Ako Stiftung & Co. Kg Capacitive touch switch
DE102006005581B4 (en) * 2006-02-06 2007-10-04 Diehl Ako Stiftung & Co. Kg Capacitive touch switch

Also Published As

Publication number Publication date
FR2271538B1 (en) 1976-10-08

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Legal Events

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CD Change of name or company name
TP Transmission of property
ST Notification of lapse