SE505825C3 - Mobile phone detector with low power consumption - Google Patents

Mobile phone detector with low power consumption

Info

Publication number
SE505825C3
SE505825C3 SE9600126A SE9600126A SE505825C3 SE 505825 C3 SE505825 C3 SE 505825C3 SE 9600126 A SE9600126 A SE 9600126A SE 9600126 A SE9600126 A SE 9600126A SE 505825 C3 SE505825 C3 SE 505825C3
Authority
SE
Sweden
Prior art keywords
antenna
output signal
connection point
detector circuit
point
Prior art date
Application number
SE9600126A
Other languages
Swedish (sv)
Other versions
SE9600126L (en
SE9600126D0 (en
SE505825C2 (en
Inventor
Tony Olsson
Original Assignee
Duhs Henry
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 Duhs Henry filed Critical Duhs Henry
Priority to SE9600126A priority Critical patent/SE505825C2/en
Publication of SE9600126D0 publication Critical patent/SE9600126D0/en
Priority to PCT/SE1997/000034 priority patent/WO1997026633A1/en
Priority to AU13263/97A priority patent/AU1326397A/en
Publication of SE9600126L publication Critical patent/SE9600126L/en
Publication of SE505825C3 publication Critical patent/SE505825C3/en
Publication of SE505825C2 publication Critical patent/SE505825C2/en

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/02—Alarms for ensuring the safety of persons
    • G08B21/0202—Child monitoring systems using a transmitter-receiver system carried by the parent and the child
    • G08B21/023—Power management, e.g. system sleep and wake up provisions
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/02—Alarms for ensuring the safety of persons
    • G08B21/0202—Child monitoring systems using a transmitter-receiver system carried by the parent and the child
    • G08B21/0241—Data exchange details, e.g. data protocol
    • G08B21/0247—System arrangements wherein the alarm criteria uses signal strength
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/24—Reminder alarms, e.g. anti-loss alarms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations

Landscapes

  • General Physics & Mathematics (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Child & Adolescent Psychology (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Telephone Function (AREA)
  • Emergency Alarm Devices (AREA)
  • Circuits Of Receivers In General (AREA)

Description

505 825 z vara nätanslutna, och detta begränsar deras användning. Ändamå- let med uppfinningen är därför att anvisa en lätt flyttbar mobiltelefonvarnare som är batteridriven men ändå har långa underhållsintervall. 505 825 z be networked, and this limits their use. Purpose- The object of the invention is therefore to provide an easily movable mobile phone alarms that are battery powered but still have long maintenance intervals.

Den uppfinningenliga mobiltelefonvarnaren anges i det bilagda patentkravet 1.The inventive mobile telephone alarm is set forth in the appendix claim 1.

Utföringsformer av varnaren anges i de bilagda osjälvständiga patentkraven.Embodiments of the alarm are set forth in the appended dependent patent claims.

Den uppfinningsenliga varnaren innefattar en antenn, och en batteridriven detektorkrets som via antennen avkänner närvaron av en aktiv mobiltelefon genom en utsignal av radiofrekvens från densamma, varvid detektorkretsen har en utgång vars utsignal år anordnad att utlösa ett alarm när en av antennen uppfångad utsignal av mobiltelefonradiofrekvens överstiger ett inställt undre gränsvärde. Enligt uppfinningen innefattar där- vid detektorkretsen en transistorkoppling vilken är anordnad att detektera radiofrekventa signaler och vilken är áterkopplad via ett lågpassfilter för att själv justera sin arbetspunkt varigenom transistorkopplingen får optimal känslighet.The warning according to the invention comprises an antenna, and a battery-powered detector circuit that detects the presence via the antenna of an active mobile phone through a radio frequency output signal from the same, the detector circuit having an output whose output signal is arranged to trigger an alarm when one of the antenna captured output of mobile telephone radio frequency exceeds one set lower limit value. According to the invention, the at the detector circuit a transistor connection which is arranged to detect radio frequency signals and which is feedback via a low-pass filter to adjust its working point itself whereby the transistor connection has optimal sensitivity.

Genom att detektorn/transistorkopplingen hela tiden har optimal känslighet,ndnimeras samtidigt strömförbrukningen. Man kan alltså säga att detektorn genom automatisk förstärkningskon- troll får en låg strömförbrukning så att en batteriförsörjning av varnaren blir möjlig, även då långa batteribytesperioder erfordras eller är önskvärda.Because the detector / transistor connection is always optimal sensitivity, while power consumption is minimized. You can that is to say that the detector by automatic amplification trolls get a low power consumption so that a battery supply of the warning becomes possible, even then long battery replacement periods required or desirable.

Mobiltelefonvarnaren kommer i det följande att beskrivas i an- slutning till ett på ritningen visat utföringsexempel. 3 5Û5 825 Fig 1 visar schematiskt en detektorkrets tillhörande en mobiltelefonvarnare.The mobile phone alarm will be described in the following in conclusion to an exemplary embodiment shown in the drawing. 3 5Û5 825 Fig. 1 schematically shows a detector circuit belonging to one mobile phone alarm.

I fig 1 visas en krets omfattande två parallella ledningsgrenar 7, 8 vilka är anslutna till varandra vid punkterna 2 och 6. Vid punkten 6 kan en utsignal, markerad Ut, tas ut. Kretsen ström- försörjes vid punkten 6 fràn en strömkälla 3 (batteri) via en resistor R3. I ledningen 7 finns en spole 5, en första konden- sator C1, en spänningsdelare som är bildad av resistorerna R1, R2, en andra kondensator C2, och en diod D. Den andra ledningen 8 innehåller en transistor 4. En antenn 1 ansluter till punkten 2.Fig. 1 shows a circuit comprising two parallel line branches 7, 8 which are connected to each other at points 2 and 6. At point 6, an output signal, marked Out, can be output. The circuit is supplied at point 6 from a power source 3 (battery) via a resistor R3. In line 7 there is a coil 5, a first capacitor C1, a voltage divider formed by resistors R1, R2, a second capacitor C2, and a diode D. The second lead 8 contains a transistor 4. An antenna 1 connects to the point 2.

Den i fig 1 visade detektorkretsen utgöres av en transistor- koppling med làg strömförbrukning. Kopplingen detekterar radio- frekventa signaler via antennen 1, och innefattar ett återkopp- lat làgpassfilter (5, 7, C1, C2, R1, R2, D) som medger transis- torn 4 att själv justera sin arbetspunkt. Härigenom uppnås en optimal känslighet. När kretsen spänningssätts med ett batteri- paket 3 kommer kondensatorerna C1, C2 att laddas upp. Cl får då en spänning av ca 0,65 volt varvid samma spänning kommer att ligga över bas 41 till emitter 42 i transistorn 4. Spänningen över C2 bestäms (instâlles med) av delaren R1/R2. Spänningen över R3 blir då skillnaden mellan matningsspänningen och spän- ningen över C2 minus framspänningen över D. Härav erhålles då strömförbrukningen över R3. I detta stabila läge är detektorn känslig för växelspänning som matas in pá transistorns 4 bas.The detector circuit shown in Fig. 1 consists of a transistor connection with low power consumption. The coupling detects radio frequent signals via the antenna 1, and includes a feedback low pass filter (5, 7, C1, C2, R1, R2, D) which allows tower 4 to adjust its working point itself. In this way one is achieved optimal sensitivity. When the circuit is energized with a battery package 3, capacitors C1, C2 will be charged. Cl then gets a voltage of about 0.65 volts at which the same voltage will be lie over base 41 to emitter 42 in transistor 4. The voltage over C2 is determined (set with) by the divider R1 / R2. The excitement over R3, the difference between the supply voltage and the voltage the voltage across C2 minus the forward voltage across D. This is then obtained power consumption over R3. In this stable position is the detector sensitive to AC voltage input to the base of transistor 4.

Växelspänningen framkallar en ökad strömförbrukning genom transistorn 4 så att spänningen sjunker på utgången mot jord.The AC voltage causes an increased power consumption through transistor 4 so that the voltage drops at the output to ground.

Utsignalen Ut styr ett alarm 9 som kan vara exempelvis akustiskt eller optiskt.The output signal Out controls an alarm 9 which can be, for example acoustically or optically.

Claims (1)

BNSDOCID: 505 825 4 P a t e n t k r a vBNSDOCID: 505 825 4 P a t e n t k r a v 1. Mobiltelefonvarnare innefattande en antenn (1) och en batteridriven (3) detektorkrets (1-8, R1, R2, R3, Cl, C2, D), vilken via antennen(lJ avkänner aktiva mobiltelefoners utsignal av radiofrekvens, varvid detektorkretsen har en utgång vars ut- signal (Ut) år anordnad att utlösa ett larm när en av antennen (1) uppfångad utsignal av mobiltelefonfrekvens överstiger ett inställt undre gränsvärde, kånnetecknad av att detektorkretsen innefattar en transistorkoppling som är återkopplad via ett lågpassfilter (2-8, Cl, C2, D, R1, R2, R3) för att själv justera sin arbetspunkt. 2L Mobiltelefonvarnare enligt krav 1, kânnetecknad av att detektorkretsen innehåller två parallella ledningsgrenar (7, 8) varvid ledningsgrenarnas F7,8) ena kopplingspunkt (2) är ansluten till antennen HJ, medan ledningsgrenarnas V7,8) andra kopplingspunkt (6) år ansluten till ett strömförsörjnings- batteri (3) via ett motstånd (R3), varvid detektorutsignalen kan tas ut vid den andra kopplingspunkten (6) mellan grenarna (7, 8), att den ena ledningsgrenen (7) från den första kopp- lingspunkten (2) räknat innehåller en spole (5), är kopplad till jord via en kondensator (Cl), innehåller en spânningsdelare (R1/R2), âr kopplad till jord via en kondensator (C2), och innehåller en mot den första punkten(2) ledande diod(D), medan den andra ledningsgrenen (8) innehåller en transistor (4) vars emitter~(42) är kopplad till jord, vars bas(4l) är kopplad till den första punkten (2), och vars kollektor (43) år kopplad till den andra kopplingspunkten (6). 5Û5825C3 I >A mobile telephone alarm comprising an antenna (1) and a battery-powered (3) detector circuit (1-8, R1, R2, R3, Cl, C2, D), which via the antenna (1J detects the output signal of active mobile telephones of radio frequency, the detector circuit having a output whose output signal (Out) is arranged to trigger an alarm when an output signal of mobile telephone frequency picked up by the antenna (1) exceeds a set lower limit value, characterized in that the detector circuit comprises a transistor connection which is fed back via a low-pass filter (2-8, Cl , C2, D, R1, R2, R3) to self-adjust its operating point 2L Mobile phone alarm according to claim 1, characterized in that the detector circuit contains two parallel line branches (7, 8), one connection point (2) of the line branches F7,8) being connected to the antenna HJ, while the second connection point (6) of the lead branches V7,8 is connected to a power supply battery (3) via a resistor (R3), whereby the detector output signal can be taken out at the second connection point (6) between the branches (7, 8), that one line branch (7) from the first connection point (2) contains a coil (5), is connected to earth via a capacitor (Cl), contains a voltage divider (R1 / R2), is connected to ground via a capacitor (C2), and contains a diode (D) leading to the first point (2), while the second lead branch (8) contains a transistor (4) whose emitter ~ (42) is connected to ground , whose base (4l) is connected to the first point (2), and whose collector (43) is connected to the second connection point (6). 5Û5825C3 I>
SE9600126A 1996-01-15 1996-01-15 Mobile phone alarms with low power consumption SE505825C2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9600126A SE505825C2 (en) 1996-01-15 1996-01-15 Mobile phone alarms with low power consumption
PCT/SE1997/000034 WO1997026633A1 (en) 1996-01-15 1997-01-14 Mobile telephone warning device
AU13263/97A AU1326397A (en) 1996-01-15 1997-01-14 Mobile telephone warning device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9600126A SE505825C2 (en) 1996-01-15 1996-01-15 Mobile phone alarms with low power consumption

Publications (4)

Publication Number Publication Date
SE9600126D0 SE9600126D0 (en) 1996-01-15
SE9600126L SE9600126L (en) 1997-07-16
SE505825C3 true SE505825C3 (en) 1997-10-13
SE505825C2 SE505825C2 (en) 1997-10-13

Family

ID=20401017

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9600126A SE505825C2 (en) 1996-01-15 1996-01-15 Mobile phone alarms with low power consumption

Country Status (3)

Country Link
AU (1) AU1326397A (en)
SE (1) SE505825C2 (en)
WO (1) WO1997026633A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2764144B1 (en) * 1997-06-02 2000-06-02 Raoul Girod APPARATUS FOR FILTERING RADIOTELEPHONES
FR2775409B1 (en) * 1998-02-25 2000-04-14 Patrice Longhi DEVICE AND METHOD FOR DETECTING THE PRESENCE OF A GSM-TYPE CELLULAR TELEPHONE IN FUNCTION
WO2000031704A1 (en) * 1998-11-19 2000-06-02 San Lik Tang A safety device
JP6821135B2 (en) * 2019-02-21 2021-01-27 Ｎｌ技研株式会社 Communication equipment

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6486724A (en) * 1987-09-29 1989-03-31 Toshiba Corp Radio telephone system
EP0581416B1 (en) * 1992-07-29 1997-08-06 Ren-Guey Yang Alarm for reminding users of negligently left portable cellular telephone
US5327144A (en) * 1993-05-07 1994-07-05 Associated Rt, Inc. Cellular telephone location system
FI2115U1 (en) * 1995-03-21 1995-10-10 Co Pat Oy Varningsanordning Foer mobile telephone system

Also Published As

Publication number Publication date
WO1997026633A1 (en) 1997-07-24
SE9600126L (en) 1997-07-16
SE9600126D0 (en) 1996-01-15
SE505825C2 (en) 1997-10-13
AU1326397A (en) 1997-08-11

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