DE10212942A1 - Mobile telephone and headset exchange multi-channel, frequency-multiplexed, frequency-modulated signals over common transmission path - Google Patents

Mobile telephone and headset exchange multi-channel, frequency-multiplexed, frequency-modulated signals over common transmission path

Info

Publication number
DE10212942A1
DE10212942A1 DE2002112942 DE10212942A DE10212942A1 DE 10212942 A1 DE10212942 A1 DE 10212942A1 DE 2002112942 DE2002112942 DE 2002112942 DE 10212942 A DE10212942 A DE 10212942A DE 10212942 A1 DE10212942 A1 DE 10212942A1
Authority
DE
Germany
Prior art keywords
frequency
peripheral device
headset
device
channel
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
DE2002112942
Other languages
German (de)
Inventor
Ralph Oppelt
Wilfried Schnell
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to DE2002112942 priority Critical patent/DE10212942A1/en
Publication of DE10212942A1 publication Critical patent/DE10212942A1/en
Application status is Ceased legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers; Analogous equipment at exchanges
    • H04M1/60Substation equipment, e.g. for use by subscribers; Analogous equipment at exchanges including speech amplifiers
    • H04M1/6033Substation equipment, e.g. for use by subscribers; Analogous equipment at exchanges including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
    • H04M1/6041Portable telephones adapted for handsfree use
    • H04M1/6058Portable telephones adapted for handsfree use involving the use of a headset accessory device connected to the portable telephone
    • H04M1/6066Portable telephones adapted for handsfree use involving the use of a headset accessory device connected to the portable telephone including a wireless connection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B5/00Near-field transmission systems, e.g. inductive loop type
    • H04B5/0006Near-field transmission systems, e.g. inductive loop type using a receiver structurally associated with a loudspeaker or an earphone
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B5/00Near-field transmission systems, e.g. inductive loop type
    • H04B5/06Near-field transmission systems, e.g. inductive loop type using a portable transmitter associated with a microphone
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02Terminal devices

Abstract

A mobile telecommunication terminal with a base device (2) and a peripheral device (6) contains an inductive coupling point (4) for the inductive transmission of a multi-channel, frequency-modulated electrical useful signal between the base device (2) and the peripheral device (6) in a frequency division multiplex method over a common transmission path.

Description

  • The invention relates to a mobile Telecommunication terminal with a basic device and a peripheral device, especially on a mobile phone with a headset.
  • A mobile telecommunications terminal contains one Base device, for example a mobile phone, with which the wireless transmitted telecommunications signals are received. In a multitude of use cases is associated with one Basic device another peripheral device, for example via a Headphone and microphone line a headset or over Data lines connected to a modem. The connection is made thereby via electrical plug contacts. For special applications it is now advantageous for the base unit to be hermetic sealed housing to the outside to use the Electronics from environmental influences, for example through water or aggressive gaseous media. This can for example, by a correspondingly complex design of the electrical plug contacts can be reached. in principle it is also possible to use the speech signal and Carry out data transmission over a radio link. Disadvantageous However, this solution is that with the base unit communicating peripheral in many applications own energy supply needed. This is especially so disadvantageous if the peripheral device is a Headset that is worn on the head and in which none heavy batteries can be accommodated. alternative this is also a signal transmission via a Infrared interface possible. However, this has in addition to Disadvantages of radio transmission still have the disadvantage that direct between the base device and the peripheral device Line of sight must exist.
  • From DE 197 43 860 C1 it is known to charge the Accumulator of an electric toothbrush required electrical energy inductively between a charger and the electric toothbrush. The well-known Device for the inductive transmission of electrical energy for this purpose comprises a primary coil arranged in the charger and one placed in the electric toothbrush Secondary coil, between which is used to charge the battery required electrical energy inductively and therefore contactless is transmitted.
  • DE 37 20 164 A1 describes a magnetic induction Coupling system for the contactless transmission of a known electrical signal in which between one Read / write unit and a memory module for both data and Supply of the memory module required electrical Energy can be transmitted inductively. The well-known coupling system however requires a separate one for each data channel Transmission path and thus a separate inductive Coupling site.
  • The invention is based on the object, a mobile Specify telecommunications terminal that a transmission a multi-channel useful signal between a base unit and a peripheral with a single link allows.
  • The stated object is achieved according to the invention with a mobile telecommunications terminal with the features of Claim 1. Since between the base unit and the Peripheral device a coupling point for inductive transmission a multi-channel frequency-modulated electrical Useful signal in a frequency division multiplex method over a common Transmission path is provided can be done with a single non-contact connection contact (inductive coupling point) in parallel a plurality of electrical useful signals from Base device to the peripheral device and from the peripheral device to Base device can be transferred.
  • In an advantageous embodiment of the invention Peripheral device a rectifier arranged from the from Base signal provided useful signal a DC voltage generated for the power supply of the peripheral device.
  • The invention is particularly advantageous in the Voice transmission between a mobile phone and a headset. There all channels and power supply only one common coupling point, that is, a single one need a common contactless connection contact is this Can be manufactured inexpensively and can easily be used in small Mobile phones can be accommodated. Another advantage is that no energy storage is required in the headset becomes. Since the useful signals are also frequency modulated ensures that after demodulation from the Signal amplitudes obtained largely independently of the Quality of inductive coupling are mechanical Manufacturing tolerances or placement inaccuracies in Area of the coupling point does not decrease Lead transmission quality.
  • To further explain the invention reference is made to the Reference examples of the drawing. Show it:
  • Fig. 1, a mobile telecommunication terminal according to the invention in a schematic principle representation,
  • Fig. 2, the operation of the coupling point in a simplified block diagram,
  • FIGS. 3 and 4 are suitable embodiments of an inductive coupling point.
  • According to FIG. 1, a mobile telecommunication terminal contains a base device 2 , in the exemplary embodiment shown a cell phone, which is connected via an inductive coupling point 4 to a peripheral device 6 , in the example shown a headset with one or more loudspeakers 8 and a microphone 10 . The inductive coupling point 4 contains a base device-side and a peripheral device-side induction coil 12 or 14 for the contactless transmission of a multi-channel electrical useful signal between the base device 2 and the peripheral device 6 via a single, common transmission path.
  • The base unit 2 contains an electronics unit 16 with signal outputs and signal inputs 18 , which is connected to an internal voltage supply 20 and forwards the useful signals to be transmitted to the induction coil 12 or processes the useful signals received from the induction coil 12 . The induction coil 14 of the peripheral device 6 is also connected to electronics 22 accommodated in the peripheral device 6 , which processes the inductively transmitted useful signals or processes the useful signals to be transmitted.
  • In other words: the electronic units 16 and 22 are used to convert the electrical signals to be transmitted into a useful signal suitable for inductive transmission.
  • Referring to FIG. 2, the electronic unit 16 comprises a number of channels corresponding number of modulators and / or demodulators. In the exemplary embodiment shown for a coupling point between a mobile telephone and a headset, a modulator 24 for a left voice channel and a modulator 26 for a right voice channel are provided. An audio signal is frequency-modulated in these modulators 24 , 26 and output to the induction coil 12 in frequency multiplexing, that is to say with carrier frequencies that differ from one another. The induction coils 12 and 14 are inductively coupled to one another by a ferrite rod 28 . The frequency-modulated useful signal picked up by the induction coil 14 is supplied in the peripheral device 6 to two demodulators 30 , 32 , in which the useful signal is separated into two useful signal components according to their carrier frequency (demultiplexer).
  • In the electronics unit 22 of the peripheral device 6 there is also a modulator 34 for the microphone signal, which passes this on to the induction coil 14 as a frequency-modulated useful signal. There it is transmitted to the electronics unit 16 and demodulated in a demodulator 36 for further processing.
  • The induction coil 14 is also connected to a rectifier 38 , which generates the supply voltage required to supply the demodulators 30 , 32 or the modulator 34 . In other words, the energy supply takes place via the same coupling point via which the voice or data transmission also takes place.
  • According to FIG. 3, the induction coil 12 of the basic device 2 is arranged on the circumference of a cylindrical recess 40 made in the housing of the basic device 2 . In this exemplary embodiment, the peripheral device 6 comprises a plug part 42 with a pin 44 , into which the ferrite rod 28 projects and which can be inserted into the cylindrical recess 40 . The ferrite rod 28 projects into the plug part 42 and is surrounded there by the induction coil 14 .
  • Fig. 4 shows an alternative embodiment in which a split ferrite rod 28 is provided, one half 28 a is arranged together with the induction coil 12 in the base device 2 and the other half together with the induction coil 14 in the plug part of the peripheral device 6 .

Claims (3)

1. Mobile telecommunication terminal with a base device ( 2 ) and a peripheral device ( 6 ) and with an inductive coupling point ( 4 ) for inductively transmitting a multi-channel frequency-modulated electrical useful signal between the base device ( 2 ) and the peripheral device ( 6 ) in a frequency division multiplexing process via a common transmission link.
2. Mobile telecommunication terminal according to claim 1, wherein the peripheral device ( 6 ) contains a rectifier ( 38 ) which generates a direct voltage for supplying power to the peripheral device ( 6 ) from the useful signal provided by the base device ( 2 ).
3. Mobile telecommunication terminal according to claim 1 or claim 2, wherein the base device ( 2 ) is a mobile phone and the peripheral device ( 6 ) is a headset.
DE2002112942 2002-03-22 2002-03-22 Mobile telephone and headset exchange multi-channel, frequency-multiplexed, frequency-modulated signals over common transmission path Ceased DE10212942A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2002112942 DE10212942A1 (en) 2002-03-22 2002-03-22 Mobile telephone and headset exchange multi-channel, frequency-multiplexed, frequency-modulated signals over common transmission path

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2002112942 DE10212942A1 (en) 2002-03-22 2002-03-22 Mobile telephone and headset exchange multi-channel, frequency-multiplexed, frequency-modulated signals over common transmission path

Publications (1)

Publication Number Publication Date
DE10212942A1 true DE10212942A1 (en) 2003-10-09

Family

ID=27815882

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2002112942 Ceased DE10212942A1 (en) 2002-03-22 2002-03-22 Mobile telephone and headset exchange multi-channel, frequency-multiplexed, frequency-modulated signals over common transmission path

Country Status (1)

Country Link
DE (1) DE10212942A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3720164A1 (en) * 1986-06-17 1987-12-23 Tokyo Keiki Kk Magnetic induction coupling system for contact-free transmission of a signal between at least two units
DE3829212A1 (en) * 1988-08-29 1990-03-15 Kabelmetal Electro Gmbh Inductive coupler for transmitting data via telephone lines
DE4009133A1 (en) * 1989-03-22 1990-09-27 Tokyo Keiki Kk Memory package system
DE19743860C1 (en) * 1997-10-04 1999-04-08 Braun Ag System esp. charge part for accumulator for inductive transmission of electric power

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3720164A1 (en) * 1986-06-17 1987-12-23 Tokyo Keiki Kk Magnetic induction coupling system for contact-free transmission of a signal between at least two units
DE3829212A1 (en) * 1988-08-29 1990-03-15 Kabelmetal Electro Gmbh Inductive coupler for transmitting data via telephone lines
DE4009133A1 (en) * 1989-03-22 1990-09-27 Tokyo Keiki Kk Memory package system
DE19743860C1 (en) * 1997-10-04 1999-04-08 Braun Ag System esp. charge part for accumulator for inductive transmission of electric power

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Electronic Welt '96, Katalog der Fa. Conrad Electronic, 92240 Hirschau, gültig ab Aug. '95, S. 475 u. 823 *

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Legal Events

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OP8 Request for examination as to paragraph 44 patent law
8131 Rejection