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EP1257017B1 - Audio device and plug assembly - Google Patents

Audio device and plug assembly Download PDF

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Publication number
EP1257017B1
EP1257017B1 EP20020008792 EP02008792A EP1257017B1 EP 1257017 B1 EP1257017 B1 EP 1257017B1 EP 20020008792 EP20020008792 EP 20020008792 EP 02008792 A EP02008792 A EP 02008792A EP 1257017 B1 EP1257017 B1 EP 1257017B1
Authority
EP
European Patent Office
Prior art keywords
audio
jack
rod
plug
remote control
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.)
Expired - Lifetime
Application number
EP20020008792
Other languages
German (de)
French (fr)
Other versions
EP1257017A1 (en
Inventor
Franken Leung
Matthew Au
Michael Chan
Lawrence Tse
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.)
Thomson Licensing SAS
Original Assignee
Thomson Licensing SAS
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
Priority claimed from EP01401185A external-priority patent/EP1257016A1/en
Application filed by Thomson Licensing SAS filed Critical Thomson Licensing SAS
Priority to EP20020008792 priority Critical patent/EP1257017B1/en
Publication of EP1257017A1 publication Critical patent/EP1257017A1/en
Application granted granted Critical
Publication of EP1257017B1 publication Critical patent/EP1257017B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/58—Contacts spaced along longitudinal axis of engagement
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R27/00—Coupling parts adapted for co-operation with two or more dissimilar counterparts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2107/00—Four or more poles

Definitions

  • the present invention is related to an audio device comprising a main unit and a wired remote control.
  • the invention is also related to a plug assembly to be used in connection with the audio device.
  • GB-A 2 335 805 discloses a reproducing apparatus and a data communication system in particular for portable audio devices.
  • the known audio device is equipped with a jack, which can selectively accommodate several types of plugs for communicating signals to different data communication standards.
  • the jack provided is capable of addressing a number of data communication standards without occupying additional connector space on the equipment.
  • US-A-4 869 566 an optical fiber and electrical plug/jack interconnection device is described.
  • the device is designed to transmit not only electrical signals but also light signals between devices connected thereby.
  • CH-A-690 393 a plug for stereo headphones is shown.
  • the plug comprises two connector rods integrated in a single isolating housing.
  • the rods are different in their structure.
  • an audio device being operable by a wired remote control, wherein the number of jacks is further reduced without compromising the flexibility of using the device.
  • an audio device comprising a main unit and a wired remote control.
  • the main unit has an interface for connecting the remote control and for exchanging audio signals and command data signals between the main unit and the remote control unit.
  • the interface comprises a data jack to transmit and/or receive command data signals, and an audio signal jack to transmit audio signals from the main unit to the remote control.
  • the data jack and the audio signal jack are separately arranged on the main unit. This specific configuration allows a large variety of possible set-ups with a minimum expense of different jacks.
  • the audio jack and the data jack have different diameters to increase the safety in operation against wrong insertion of plugs.
  • the audio jack is a combined optical and electrical jack.
  • the audio jack is a combined optical and electrical 4-pole jack allowing to connect selectively an electrical 4-pole plug, an electrical 3-pole plug and an optical plug.
  • a second aspect of the present invention is related to a plug assembly for a wired remote control unit for controlling an audio device.
  • the plug assembly comprises a double rod plug having an audio rod and a data rod integrated in a single isolating housing.
  • the audio rod and the data rod have different diameters. This arrangement presents an effective protection against the inadvertent insertion of the plug rods into the wrong jack.
  • the plug assembly can most advantageously be used in connection with an audio device according to the first aspect of the invention.
  • the protective feature is further supported if the rod having the larger diameter is longer than the rod having the smaller diameter. Then the user can even more easily realize his attempt to connect the plug in the wrong orientation.
  • Fig. 1a displays a top view of a combined CD/MP3 player comprising two units.
  • the main unit is referenced as a whole with reference number 1.
  • On the topside of the player a group of operating elements 2 are arranged, realized in the present embodiment as push buttons.
  • the operating elements 2 for the volume control are arranged on a side of the housing of the player (Fig. 1b).
  • the operating elements 2 enable a user of the device to enter commands like "play", “forward”, “reverse” and others.
  • the actual operating status of the player 1 is indicated on a display 3, which is realized as an LCD display.
  • such a portable device is carried in a pocket or on a belt of the clothing when the user listens to the music via headphones. Under these circumstances it is rather inconvenient to operate the device 1 by means of the operating elements 2 because when the player is e.g. carried in a pocket the user cannot see the elements 2 nor the operational status indicated on display 3, like the song number.
  • the player is controllable by a remote control 4 forming the second unit of the player.
  • the remote control 4 is connectable to the main unit 1 by a cable 6 terminating in a 2-rod plug 7.
  • the plug 7 has an audio rod 8 and a data rod 9, which are integrated in a single isolating housing 10.
  • the audio rod 8 has a larger diameter than the data rod 9 and is also longer.
  • An audio jack 12 and a data jack 13 are provided on one side of the housing of the player 1 (Fig. 1b).
  • the audio jack and the data jack 13 are arranged mechanically and electrically to accommodate the audio rod 8 and the data jack 9, respectively, for establishing a mechanical and electrical connection between the remote control 4 and the main unit 1.
  • the remote control 4 itself is provided with a headphone jack not shown in Fig. la. Thereby, a pair of headphones 11 for sound reproduction is connectable to the remote control 4, i.e. the sound signal generated by the main unit 1 is passed through the remote control 4.
  • the remote control unit 4 is provided with operating elements 14 and a display 15 enabling the user to control the connected audio device.
  • the remote control 4 is fixed to the clothing by a clip in the same way as a pen. It is therefore easily detachable of and attachable to the clothing. Hence, each time the user intends to monitor or control the audio device he can take the remote control unit into his hands effecting a good visibility of the display 15 and accessibility of the control elements 14.
  • Fig. 2a exhibits the audio jack 12, the data jack 13 and the rod plug 7 in more detail.
  • the different diameters and lengths of the rods 8 and 9 are clearly visible.
  • this arrangement prevents the inadvertent insertion of the rods 8 and 9 into the wrong jacks 12 and 13.
  • the audio rod 8 is a 4-pole rod having four contact regions.
  • Contact regions 16 and 17 are associated with the left and right channel of a stereo audio signal, respectively.
  • Contact regions 18 and 19 are associated with the ground for analog signals and the ground for digital signals, respectively.
  • the data rod 9 is a 3-pole rod having three contact regions. Contact region 21 is reserved for receiving start-up signals, contact region 22 is attributed to digital display and command data, and contact region 23 is attributed to the supply voltage for the remote control.
  • Fig. 2c the arrangement of the electrical contacts of the audio jack 12 are shown. Inside the jack there are contact springs 26 establishing electrical contact to the contact regions of an inserted rod. Each of the springs 26 forms a contact pad 16'...19', respectively. The contact pads 16'...19' are arranged to make electrical contact to the correspondingly referenced contact regions 16...19 of the audio rod 8. It is noted that the audio jack 12 allows to accommodate not only the audio rod 8 of plug 7 but also other single rod plugs, which are shown on the right side of Fig. 2c.
  • the plugs shown in Fig. 2c can alternatively be inserted into the audio jack 12. It is from top to bottom the audio rod 8 of the remote control plug 7, a 3-pole plug 27 of a line output or headphone plug, and finally an optical plug 28 for transmitting optical audio data. It is an advantage of the present invention that the audio jack 8, which is necessary to connect the remote control can also be used for other purposes, in particular to connect head phones directly to the main unit 1. Hence, the present invention allows to safe one or two additional jacks on the main unit.
  • Fig. 3 schematically shows a block diagram of the main unit and the remote control unit with regard to the command and display data exchange.
  • a block diagram of the main unit On the left hand side of the dashed line 31 a block diagram of the main unit is shown whereas on the right hand side of the line 31 a block diagram of the remote control unit 4 is shown.
  • the remote control unit is provided with a ⁇ P 32 to communicate with a main ⁇ P 33 in the main unit and to drive the LCD display 15, which indicates all functions and activities going on in the main unit.
  • the user activates one of the switches 34 forming a "key ladder" representing a potential divider.
  • the main unit further comprises a DC-DC converter 36 as a voltage regulator and a power ON/OFF device.
  • the main ⁇ P 33 When the "Play" key is pressed the output of the remote control is short to ground, the DC-DC converter 36 starts to operate and a supply voltage Vcc is generated. As long as the Vcc voltage is available the main ⁇ P 33 operates. It keeps the DC-DC converter 36 in ON mode as long as the output voltage of the remote control unit 4 remains in a predetermined "Play" key range. If this is not the case the main ⁇ P 33 turns the DC-DC converter 36 OFF.
  • Fig. 4 displays possible set-up configurations in a schematic way, wherein dashed lines indicate alternative connections.
  • the remote control 4 is connected to the main unit.
  • a headphone phone plug 41 or alternatively a line output plug 42 are connectable.
  • the line output plug is apt for supplying the audio signal to loudspeakers 43 or an audio amplifier not shown in Fig. 3.
  • Fig. 4b shows basically the same configuration as Fig. 4a without the interposition of the remote control 4.
  • the headphone plug 41 and the line output plug 42, respectively, are rather inserted directly into the audio jack 12 of the main unit.
  • Fig. 4c exemplifies a configuration, in which an optical plug 44 is connected to the audio jack 12.
  • a cable associated with the optical plug 44 in general is used to transmit digital optical audio data between two audio devices. It is important to note that the numerous configurations require only the audio jack 12 and the data jack 13 at the main unit.

Landscapes

  • Headphones And Earphones (AREA)
  • Circuit For Audible Band Transducer (AREA)

Description

  • The present invention is related to an audio device comprising a main unit and a wired remote control. The invention is also related to a plug assembly to be used in connection with the audio device.
  • GB-A 2 335 805 discloses a reproducing apparatus and a data communication system in particular for portable audio devices. The known audio device is equipped with a jack, which can selectively accommodate several types of plugs for communicating signals to different data communication standards. The jack provided is capable of addressing a number of data communication standards without occupying additional connector space on the equipment.
  • In US-A-4 869 566 an optical fiber and electrical plug/jack interconnection device is described. The device is designed to transmit not only electrical signals but also light signals between devices connected thereby.
  • In CH-A-690 393 a plug for stereo headphones is shown. The plug comprises two connector rods integrated in a single isolating housing. The rods are different in their structure.
  • Starting from here it is desirable to have an audio device being operable by a wired remote control, wherein the number of jacks is further reduced without compromising the flexibility of using the device.
  • According to a first aspect of the invention, therefore, an audio device is suggested comprising a main unit and a wired remote control. The main unit has an interface for connecting the remote control and for exchanging audio signals and command data signals between the main unit and the remote control unit. The interface comprises a data jack to transmit and/or receive command data signals, and an audio signal jack to transmit audio signals from the main unit to the remote control.
  • The data jack and the audio signal jack are separately arranged on the main unit. This specific configuration allows a large variety of possible set-ups with a minimum expense of different jacks. The audio jack and the data jack have different diameters to increase the safety in operation against wrong insertion of plugs.
  • In one embodiment of the inventive audio device the audio jack is a combined optical and electrical jack.
  • In a particularly advantageous embodiment of the invention the audio jack is a combined optical and electrical 4-pole jack allowing to connect selectively an electrical 4-pole plug, an electrical 3-pole plug and an optical plug.
  • A second aspect of the present invention is related to a plug assembly for a wired remote control unit for controlling an audio device. The plug assembly comprises a double rod plug having an audio rod and a data rod integrated in a single isolating housing. The audio rod and the data rod have different diameters. This arrangement presents an effective protection against the inadvertent insertion of the plug rods into the wrong jack. The plug assembly can most advantageously be used in connection with an audio device according to the first aspect of the invention.
  • The protective feature is further supported if the rod having the larger diameter is longer than the rod having the smaller diameter. Then the user can even more easily realize his attempt to connect the plug in the wrong orientation.
  • The present invention can be understood more easily by reading the following description in connection with the attached drawing.
  • In the drawing an exemplifying embodiment of the present invention is shown. It shows:
    • Fig. 1a
    a top view of a portable CD player together with a wired remote control and head phones,
    Fig. 1b
    a side view of the player of Fig. 1a,
    Fig. 2a
    the mechanical arrangement of jacks and a twin-rod plug,
    Fig. 2b
    the contact configuration on the twin-rod plug
    Fig. 2c
    the contact configuration of the audio jack and different types of allowable rods,
    Fig. 3
    a schematic block diagram of the main unit and the remote control unit, and
    Fig. 4a...4c
    several set-up configurations of the audio device
  • Fig. 1a displays a top view of a combined CD/MP3 player comprising two units. The main unit is referenced as a whole with reference number 1. On the topside of the player a group of operating elements 2 are arranged, realized in the present embodiment as push buttons. The operating elements 2 for the volume control are arranged on a side of the housing of the player (Fig. 1b). The operating elements 2 enable a user of the device to enter commands like "play", "forward", "reverse" and others. The actual operating status of the player 1 is indicated on a display 3, which is realized as an LCD display.
  • In general, such a portable device is carried in a pocket or on a belt of the clothing when the user listens to the music via headphones. Under these circumstances it is rather inconvenient to operate the device 1 by means of the operating elements 2 because when the player is e.g. carried in a pocket the user cannot see the elements 2 nor the operational status indicated on display 3, like the song number.
  • In order to enhance the operational comfort for the user the player is controllable by a remote control 4 forming the second unit of the player. The remote control 4 is connectable to the main unit 1 by a cable 6 terminating in a 2-rod plug 7. The plug 7 has an audio rod 8 and a data rod 9, which are integrated in a single isolating housing 10. The audio rod 8 has a larger diameter than the data rod 9 and is also longer. An audio jack 12 and a data jack 13 are provided on one side of the housing of the player 1 (Fig. 1b). The audio jack and the data jack 13 are arranged mechanically and electrically to accommodate the audio rod 8 and the data jack 9, respectively, for establishing a mechanical and electrical connection between the remote control 4 and the main unit 1.
  • The remote control 4 itself is provided with a headphone jack not shown in Fig. la. Thereby, a pair of headphones 11 for sound reproduction is connectable to the remote control 4, i.e. the sound signal generated by the main unit 1 is passed through the remote control 4.
  • The remote control unit 4 is provided with operating elements 14 and a display 15 enabling the user to control the connected audio device. The remote control 4 is fixed to the clothing by a clip in the same way as a pen. It is therefore easily detachable of and attachable to the clothing. Hence, each time the user intends to monitor or control the audio device he can take the remote control unit into his hands effecting a good visibility of the display 15 and accessibility of the control elements 14.
  • Fig. 2a exhibits the audio jack 12, the data jack 13 and the rod plug 7 in more detail. The different diameters and lengths of the rods 8 and 9 are clearly visible. Advantageously this arrangement prevents the inadvertent insertion of the rods 8 and 9 into the wrong jacks 12 and 13.
  • In Fig. 2b the electrical configuration of the rods 8 and 9 are shown. The audio rod 8 is a 4-pole rod having four contact regions. Contact regions 16 and 17 are associated with the left and right channel of a stereo audio signal, respectively. Contact regions 18 and 19 are associated with the ground for analog signals and the ground for digital signals, respectively.
  • The data rod 9 is a 3-pole rod having three contact regions. Contact region 21 is reserved for receiving start-up signals, contact region 22 is attributed to digital display and command data, and contact region 23 is attributed to the supply voltage for the remote control.
  • In Fig. 2c the arrangement of the electrical contacts of the audio jack 12 are shown. Inside the jack there are contact springs 26 establishing electrical contact to the contact regions of an inserted rod. Each of the springs 26 forms a contact pad 16'...19', respectively. The contact pads 16'...19' are arranged to make electrical contact to the correspondingly referenced contact regions 16...19 of the audio rod 8. It is noted that the audio jack 12 allows to accommodate not only the audio rod 8 of plug 7 but also other single rod plugs, which are shown on the right side of Fig. 2c.
  • The plugs shown in Fig. 2c can alternatively be inserted into the audio jack 12. It is from top to bottom the audio rod 8 of the remote control plug 7, a 3-pole plug 27 of a line output or headphone plug, and finally an optical plug 28 for transmitting optical audio data. It is an advantage of the present invention that the audio jack 8, which is necessary to connect the remote control can also be used for other purposes, in particular to connect head phones directly to the main unit 1. Hence, the present invention allows to safe one or two additional jacks on the main unit.
  • Fig. 3 schematically shows a block diagram of the main unit and the remote control unit with regard to the command and display data exchange. On the left hand side of the dashed line 31 a block diagram of the main unit is shown whereas on the right hand side of the line 31 a block diagram of the remote control unit 4 is shown. The remote control unit is provided with a µP 32 to communicate with a main µP 33 in the main unit and to drive the LCD display 15, which indicates all functions and activities going on in the main unit. For inputting a command the user activates one of the switches 34 forming a "key ladder" representing a potential divider. When one of the keys is pressed the respective voltage level is provided to the main µP 33, which converts the voltage into a corresponding digital value by means of an internal A/D converter. The digital represents a command word for the operation of the main unit 1. The main unit further comprises a DC-DC converter 36 as a voltage regulator and a power ON/OFF device.
  • When the "Play" key is pressed the output of the remote control is short to ground, the DC-DC converter 36 starts to operate and a supply voltage Vcc is generated. As long as the Vcc voltage is available the main µP 33 operates. It keeps the DC-DC converter 36 in ON mode as long as the output voltage of the remote control unit 4 remains in a predetermined "Play" key range. If this is not the case the main µP 33 turns the DC-DC converter 36 OFF.
  • Obviously, the variety of possible connections creates a high flexibility for the set up of the inventive audio device. The various set-up possibilities are visualized in Fig. 4.
  • Fig. 4 displays possible set-up configurations in a schematic way, wherein dashed lines indicate alternative connections. In Fig. 4a the remote control 4 is connected to the main unit. To the remote control again a headphone phone plug 41 or alternatively a line output plug 42 are connectable. The line output plug is apt for supplying the audio signal to loudspeakers 43 or an audio amplifier not shown in Fig. 3.
  • Fig. 4b shows basically the same configuration as Fig. 4a without the interposition of the remote control 4. The headphone plug 41 and the line output plug 42, respectively, are rather inserted directly into the audio jack 12 of the main unit.
  • Finally, Fig. 4c exemplifies a configuration, in which an optical plug 44 is connected to the audio jack 12. A cable associated with the optical plug 44 in general is used to transmit digital optical audio data between two audio devices. It is important to note that the numerous configurations require only the audio jack 12 and the data jack 13 at the main unit.

Claims (5)

  1. Audio device comprising a main unit (1) and a wired remote control unit (4), the main unit (1) having an interface for connecting
    the remote control unit (4) exchanging audio signals and command data signals between the main unit and the remote control,
    wherein the interface comprises a data jack (13) to transmit and/or receive command data signals, and an audio signal jack (12) to transmit audio signals from the main unit to the remote control, and
    wherein the data jack and the audio signal jack are separate,
    characterized in that the audio jack (12) and the data (13) jack have different diameters.
  2. Audio device according to claim 1, characterized in that the audio jack (12) is a combined optical and electrical jack.
  3. Audio device according to claim 2, characterized in that the audio jack (12) is a combined optical and electrical 4-pole jack allowing to connect selectively an electrical 4-pole plug (8), an electrical 3-pole plug (27) and an optical plug (28).
  4. Plug assembly for a wired remote control unit for controlling an audio device,
    wherein the plug assembly (7) comprises a double rod plug having an audio rod (8) and a data rod (9) integrated in a single isolating housing (10),
    characterized in that the audio rod (8) and the data rod (9) have different diameters.
  5. Plug assembly according to claim 4, characterized in that
    the rod having the larger diameter is longer than the rod having the smaller diameter.
EP20020008792 2001-05-09 2002-04-19 Audio device and plug assembly Expired - Lifetime EP1257017B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20020008792 EP1257017B1 (en) 2001-05-09 2002-04-19 Audio device and plug assembly

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP01401185A EP1257016A1 (en) 2001-05-09 2001-05-09 Audio device and plug assembly
EP01401185 2001-05-09
EP20020008792 EP1257017B1 (en) 2001-05-09 2002-04-19 Audio device and plug assembly

Publications (2)

Publication Number Publication Date
EP1257017A1 EP1257017A1 (en) 2002-11-13
EP1257017B1 true EP1257017B1 (en) 2004-07-21

Family

ID=26077237

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020008792 Expired - Lifetime EP1257017B1 (en) 2001-05-09 2002-04-19 Audio device and plug assembly

Country Status (1)

Country Link
EP (1) EP1257017B1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8223986B2 (en) 2009-11-19 2012-07-17 Apple Inc. Electronic device and external equipment with digital noise cancellation and digital audio path
US8573861B2 (en) 2009-11-19 2013-11-05 Apple Inc. Audio jacks with optical and electrical paths
US8577195B2 (en) 2009-11-19 2013-11-05 Apple Inc. Interface accessories with optical and electrical paths
US8620162B2 (en) 2010-03-25 2013-12-31 Apple Inc. Handheld electronic device with integrated transmitters
US8651750B2 (en) 2009-11-19 2014-02-18 Apple Inc. Audio connectors with optical structures and electrical contacts
US8682003B2 (en) 2009-11-19 2014-03-25 Apple Inc. Equipment with optical paths for noise cancellation signals
US8718294B2 (en) 2009-11-19 2014-05-06 Apple Inc. Audio connectors with wavelength-division-multiplexing capabilities

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6988905B2 (en) * 2001-12-21 2006-01-24 Slab Dsp Limited Audio jack with plug or head set identification circuit

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR870011719A (en) * 1986-05-28 1987-12-26 쓰지 하루오 Connection device
US5492489A (en) * 1994-06-24 1996-02-20 Chavakula; Anand K. Four way audio cable adapter
JP4355376B2 (en) * 1998-03-27 2009-10-28 ソニー株式会社 Audio and data communication jack, playback device
CH690393A5 (en) * 1999-06-28 2000-08-15 Armand D Touboul Aircraft passenger stereophonic headset having two plastic holder jack aircraft configuration and breakable plastic section allowing single jack other stereophonic applications use

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8223986B2 (en) 2009-11-19 2012-07-17 Apple Inc. Electronic device and external equipment with digital noise cancellation and digital audio path
US8573861B2 (en) 2009-11-19 2013-11-05 Apple Inc. Audio jacks with optical and electrical paths
US8577195B2 (en) 2009-11-19 2013-11-05 Apple Inc. Interface accessories with optical and electrical paths
US8651750B2 (en) 2009-11-19 2014-02-18 Apple Inc. Audio connectors with optical structures and electrical contacts
US8682003B2 (en) 2009-11-19 2014-03-25 Apple Inc. Equipment with optical paths for noise cancellation signals
US8718294B2 (en) 2009-11-19 2014-05-06 Apple Inc. Audio connectors with wavelength-division-multiplexing capabilities
US9020162B2 (en) 2009-11-19 2015-04-28 Apple Inc. Electronic device and external equipment with digital noise cancellation and digital audio path
US8620162B2 (en) 2010-03-25 2013-12-31 Apple Inc. Handheld electronic device with integrated transmitters

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