KR20110097028A

KR20110097028A - Receiver system

Info

Publication number: KR20110097028A
Application number: KR1020100016637A
Authority: KR
Inventors: 오정택; 이민형
Original assignee: 삼성전자주식회사
Priority date: 2010-02-24
Filing date: 2010-02-24
Publication date: 2011-08-31
Also published as: KR101640946B1

Abstract

The present invention relates to a receiver system comprising a portable receiver and a device for transmitting an audio signal to the portable receiver, the receiver system comprising: a wire comprising a first core line and a second core line, a sensor, and located in front of the speaker unit A receiver including a first transformer for transmitting the audio signal transmitted through the wire to the speaker unit, and a converter for outputting the sensor signal by outputting a current corresponding to the sensor signal generated by the sensor to the wire; And a DC power supply unit configured to add a DC voltage between the first core line and the second core line, a second transformer positioned at the front end of the processor to transfer the sensor signal transmitted through the wire to the processor, and the sensor signal. And outputs a current corresponding to the audio signal to the wire. The device includes a processor for outputting a video signal.

Description

Receiver system {RECEIVER SYSTEM}

The present invention relates to a receiver system comprising a portable receiver and a device for transmitting an audio signal to the portable receiver, and more particularly, to a receiver system comprising a portable receiver equipped with a sensor.

Among the sound devices, a receiver is a device that converts electrical vibrations into sound vibrations, and means devices that can be heard directly in the ear. Examples of the receiver typically include earphones, headphones, a headset, and the like. These receivers are increasingly used as various portable devices such as mobile phones, MP3 players, PMPs, and the like become commonplace.

Current portable devices are not developed for one particular function, but are being developed to provide a plurality of additional functions. For example, in addition to the basic phone call function, the mobile phone provides a variety of additional functions such as wireless data communication, short-range wireless communication, music file playback, video file playback, DMB (Digital Multimedia Broadcasting) service reception, and digital camera. .

It may also be configured to provide additional functionality using the peripherals of the portable device. For example, by attaching a temperature sensor to a speaker unit, such as a receiver housing or ear pads, to output audio signals through the speaker and to measure body temperature, the receiver and device can be used to determine the health of the user. You can also configure Alternatively, the device and the receiver may be configured to mount a sensor to detect whether or not the body is in contact with the speaker unit to determine whether the speaker is detached from the ear.

As such, by attaching various sensors to the receiver, portable devices have been developed that output audio information through a speaker and provide additional functions using ambient information collected through the sensor. In the following description, a system including a receiver equipped with a sensor and a device connected to the receiver to output an audio signal to the receiver and to provide a function using data collected from the sensor is called a receiver system.

Since a typical receiver carries only an audio signal, the speaker of the receiver and the wire connecting the device are composed of two core wires. However, when the receiver includes a sensor, a connection line for applying sensor driving power and ground and a sensor signal line or a communication line with the sensor are additionally required.

1, 2A, and 2B are diagrams showing the configuration of earphones reflecting such a need, and show a receiver system composed of various earphones and a handset.

1 is a block diagram of a receiver system including an earphone 11 with an analog sensor and a handset 13. Referring to Figure 1, as the analog sensor is inserted, the number of core wires of the earphone wire 12 is at least four core wires (sound +, sound-, Vcc, GND) for audio signal transmission and sensor voltage application, and the output of the analog sensor It is determined by the sum of the communication lines corresponding to the numbers. Accordingly, the earphone wire 12 includes at least five cores.

In the case of the earphones 21 and 31 with digital sensors as shown in FIGS. 2A and 2B, the number of core wires included in the earphone wires 22 and 32 varies according to a communication method. As shown in FIG. 2A, when the I ² C (Inter-Integrated Circuit) communication method is used, the earphone wire 22 includes at least seven core wires. When using the SPI (Serial Peripheral Interface) method as shown in FIG. Earphone wire 32 will include at least eight core wires.

As such, when the wired receiver having the actual sensor is implemented, the diameter of the wire connecting the speaker unit and the various devices increases due to the increase in the number of core athletes, which is not visually disadvantageous, and the user inconvenience due to the weight of the wire. There is a problem that causes.

In order to solve the above problems, the present invention provides a receiver system including a receiver in which a wire connecting the speaker unit and the device is composed of two core wires even when the receiver is mounted with a sensor.

In another aspect, the present invention is a receiver having a sensor, the music signal transmission to the speaker unit, the power supply to the sensor, the device transmission of the sensor signal is limited while limiting the core wires of the wire connecting the speaker unit and the device to two Provide a possible receiver system.

In addition, the present invention provides a receiver system that can prevent user inconvenience by configuring a wire similarly to a general receiver even when the receiver has a sensor.

Meanwhile, the receiver system according to the present invention includes a wire including a first core wire and a second core wire, a sensor, and a first transformer positioned at a front end of a speaker unit and transmitting an audio signal transmitted through the wire to the speaker unit. And a receiver including a converter for outputting the sensor signal by outputting a current corresponding to the sensor signal generated by the sensor to the wire, and a DC for adding a DC voltage between the first core line and the second core line. A power supply unit, a second transformer positioned at a front end of the processor and transmitting the sensor signal transmitted through the wire to the processor, and processing the sensor signal and outputting a current corresponding to the audio signal to the wire; And a device including a processor to output an audio signal.

The present invention provides a receiver with a sensor, which limits the core wires of the wires connecting the ear speaker and the plug to two, and enables music signal transmission to the speaker, power supply to the sensor, and device transmission of the sensor signal. Accordingly, the present invention can prevent user inconvenience.

1, 2a and 2b show a general receiver system,
3 to 7 show a receiver system according to an embodiment of the invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that the same components in the drawings are represented by the same reference numerals and symbols as much as possible even though they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

According to the present invention, the receiver is equipped with a sensor and provides an audio signal to the user, and measures and transmits the user's physical condition, exercise amount or various surrounding environments to the device through the sensor. At this time, the core line of the wire connecting the speaker unit of the receiver and the corresponding device is limited to two, and audio signal transmission to the speaker unit, power supply to the sensor, and device transmission of the sensor signal are possible through the two core wires. The receiver may be, for example, an earphone, a headphone, a headset, or the like, and the device may be, for example, a mobile phone, an MP 3 player, a PMP, a PDP, or the like. The present invention is applicable to such various receivers and devices.

According to the invention the wire connecting the receiver and the device comprises two core wires. The device adds a DC voltage between the two cores for power supply and bidirectional signal transfer corresponding to each of the audio and sensor signals. The device then inputs an audio signal current in the transmission loop that is proportional to the audio signal to deliver the audio signal towards the receiver.

In contrast, the receiver inputs a sensor signal current proportional to the sensor signal into the transmission loop. The receiver also includes a transformer in front of the speaker unit, so that the audio signal current transmitted from the device is delivered to the speaker unit.

The device also includes a transformer for inducing the sensor signal in front of the analog to digital converter (ADC) for the sensor signal, so that the sensor signal current is delivered to the processor of the device, so that the sensor signal can be processed by the processor.

3 to 7 illustrate an example of a configuration of a receiver system including a receiver and a device according to an exemplary embodiment of the present invention. 3 to 7 illustrate a case of using an earphone as an example of a receiver to which the present invention is applied to help understanding of the present invention.

3 is a block diagram of a receiver system according to an embodiment of the present invention when the earphone is equipped with an analog sensor. Referring to FIG. 3, the earphone wire 120 includes a first core line 121 and a second core line 122.

The device 130 includes a noise filter unit 200, a DC power supply unit 240, an analog-to-digital converter (ADC) 220, a device transformer 230, and a processor 210.

The DC power supply unit 240 is positioned immediately after the connection point between the earphone wire 120 and the device, and applies a DC voltage between the two core wires 121 and 122 of the earphone wire 120. The sensor signal current Iacc and the audio signal current Iss may flow in both directions by the symmetrically configured circuit of the earphone 110 and the device 130 and the DC power source added to the symmetry point. That is, when the sensor signal current Iss or the sensor signal current Iacc occurs, the voltage balance between the earphone 110 and the device 130 held by the DC power supply 240 is broken, and thus the current is lowered toward the lower voltage. Will flow.

The DC power supply 240 supplies power to the sensor 270.

The noise filter unit 200 including two inductors 201 and 202 removes power noise of the DC power supply unit 240.

The device transformer 230 is positioned in front of the ADC 220 and transmits the sensor signal current Iacc transmitted through the earphone wire 120 to the ADC 220. At this time, both ends of the primary coil of the device transformer 230 is connected to the first core line 121 and the second core line 122 of the earphone wire 110, both ends of the secondary coil is connected to the ADC 220. .

The ADC 220 converts the sensor signal current Iacc, which is an analog signal transmitted from the device transformer 230, into a digital signal and outputs the digital signal to the processor 210.

The processor 210 analyzes and processes a sensor signal input from the ADC 220 to cause a corresponding function to be executed, and outputs an audio signal current Iss proportional to the audio signal. The audio signal current Iss is input to the earphone wire 120 through the primary coil of the device transformer 230 and transferred to the earphone 110.

The earphone 110 includes a speaker unit 290, an earphone transformer 250, a sensor 270, a converter 260, and a DC transformer 280.

The earphone transformer 250 is positioned in front of the speaker unit 290 and transmits the audio signal current Iss transmitted through the earphone wire 120 to the speaker unit 290. At this time, one end of the primary coil of the earphone transformer 250 is connected to the first core line 121 of the earphone wire 110 and the other end of the primary coil is connected to the output of the converter 260, the secondary coil Both ends of are connected to the speaker unit 290.

The DC transformer 280 changes the DC voltage applied from the DC power supply 240 to a voltage having an appropriate magnitude to the sensor 270, and applies the changed DC voltage to the sensor 270.

The sensor 270 generates a sensor signal voltage having a voltage corresponding to the sensing result and outputs the sensor signal voltage to the converter 260.

The converter 260 outputs the sensor signal current Iacc proportional to the voltage of the input sensor signal. The sensor signal current Iacc is applied to the earphone wire 120 via the earphone transformer 250 and then transferred to the device 130.

In the system configured as shown in Fig. 3, the audio signal current Iss, the sensor signal current Iacc, and the path of voltage application are as follows. First, the audio signal current Iss is output by the processor 210 and input to the primary coil of the device transformer 230. The audio signal current Iss passing through the primary coil of the device transformer 230 is applied to the first core line 121 of the earphone wire 120. The audio signal current Iss is input to the primary coil of the earphone transformer 250 and guided to the secondary coil, and thus is transmitted to the speaker unit 290.

The driving voltage of the sensor 270 is applied by the DC power supply unit 240 to the DC transformer 280 through the first core line 121. The DC transformer 280 adjusts the applied voltage appropriately and applies it to the sensor 270.

The sensor signal is generated by the sensor 270 and is converted into a current form proportional to the sensed value by the converter 260 and outputted. Accordingly, the sensor signal current Iacc passes through the primary coil of the earphone transformer 250. It is transmitted to the first core line 121. The sensor signal current Iacc is input to the primary coil of the device transformer 230. Accordingly, the sensor signal current Iacc is induced in the secondary coil of the device transformer 230 and transferred to the ADC 220. The ADC 220 converts the sensor signal current Iacc into a digital signal and outputs the digital signal to the processor 210.

Even when the earphone wire 120 is formed of two core wires as described above, bidirectional transmission of the sensor signal and the audio signal is possible.

FIG. 4 illustrates that when the sensor 270 has a plurality of output channels 271, 272, and 273, a multiplexer 310 and a clock generator 300 are provided at an input terminal of the converter 260. An example of a method of implementing a multi-channel so as to sequentially transmit a plurality of sensor signals to the device 130 is shown. The plurality of output channels 271, 272, and 273 are connected to inputs of the respective multiplexers 310, and the multiplexers 310 divide the plurality of sensor signals in a time division manner according to a clock applied from the clock generator 300. It is sequentially output to the conversion unit 260.

FIG. 5 illustrates that the sensor signal current Iacc in the earphone 110 may be transmitted to the speaker unit 290 by the earphone transformer 250 in front of the speaker unit 290 when the system is configured as shown in FIG. 3. If the frequency of the Iacc is different from the audible frequency, it is blocked by the speaker's transfer function itself, indicating a situation that does not matter. In addition, with respect to the signal transmitted by the device transformer 230 of the device 130 to the ADC 220, a band pass filter 330 is provided to prevent the audio signal current Iss from being applied to the ADC 220 stage. It may be. Since the audio signal and the sensor signal have different frequency ranges, only the sensor signal can be extracted by the filter.

FIG. 6 is a diagram illustrating a case where a high impedance device is added to a loop and cross-device connection is changed for crosstalk or sidetone removal described in FIG. 5. Referring to FIG. 6, one end of the first impedance element 350 is connected to the primary coil and the first core line 121 of the device transformer 230, and the other end of the first impedance element 350 is connected to the device transformer ( To the secondary coil of 230). One end of the second impedance element 340 is connected to the primary coil and the first core line 121 of the earphone transformer 250, and the other end of the second impedance element 340 is the secondary of the earphone transformer 250. Connect to the coil.

Accordingly, the sensor signal current Iacc generated by the sensor 270 is not transmitted to the secondary coil of the earphone transformer 250 by the second impedance element 340, and thus, crosstalk or a phonograph may be removed. In addition, in the case of the audio signal current Iss, the output of the speaker unit 290 is determined only by the induction of the primary coil without being introduced into the secondary coil of the earphone transformer 250 by the second impedance element 340. The first impedance element 350 also plays a similar role for the device transformer 230. That is, the audio signal current Iss output from the processor 210 is not transmitted to the secondary coil of the earphone transformer 250 by the first impedance element 350, so that crosstalk or a phonograph may be removed. In the case of the sensor signal current Iacc, the first impedance element 350 is applied to the ADC 220 only by induction of the primary coil, rather than flowing into the secondary coil of the device transformer 230. Accordingly, crosstalk or phonographs can be eliminated.

FIG. 7 illustrates a dongle circuit of the device 130 in FIGS. 3, 4, 5, and 6 described above to drive the earphone 110 with the sensor when the device 130 is a general handset. (140) is provided as a structure, so that the earphone 110 with a sensor can be used as a general handset.

In the above description of the present invention, specific embodiments have been described, but various modifications can be made without departing from the scope of the present invention. In the above example, in order to help the understanding of the description, the earphone 100 and the earphone wire 120 has been described separately, in general, the earphone wire 120 is included in the earphone 100. In addition, the earphone and the earphone wire may be replaced with various receivers and receiver wires. Therefore, the scope of the present invention should not be defined by the described embodiments, but should be defined by the equivalent of claims and claims.

Claims

In the receiver system,
A wire including a first core wire and a second core wire, a sensor, a first transformer positioned at a front end of a speaker unit to transmit an audio signal transmitted through the wire to the speaker unit, and a sensor signal generated by the sensor A receiver including a converter configured to output the sensor signal by outputting a current corresponding to the wire;
A DC power supply unit for adding a DC voltage between the first core line and the second core line, the second transformer positioned at the front end of the processor to transfer the sensor signal transmitted through the wire to the processor, and the sensor signal And a processor for processing and outputting the audio signal by outputting a current corresponding to the audio signal to the wire.

The receiver system of claim 1, further comprising an analog to digital converter (ADC) for converting the sensor signal transmitted from the second transformer into a digital signal and outputting the digital signal to the processor.

According to claim 1, wherein one end of the primary coil of the first transformer is connected to the first core, the other end of the primary coil of the first transformer is connected to the output of the converter, the first transformer Both ends of the secondary coil is connected to the speaker unit.

The method of claim 1, wherein one end of the primary coil of the second transformer is connected to the first core, the other end of the primary coil of the second transformer is connected to the processor, the secondary of the second transformer A receiver system, characterized in that both ends of the coil are connected to the ADC.

5. The receiver system of claim 4, further comprising a filter for filtering the audio signal between one end of the secondary coil of the second transformer and the ADC.

The receiver system according to claim 1, wherein the receiver further comprises a DC transformer for adjusting and outputting DC power transmitted from the DC power supply unit through the wire to a driving power of the sensor.

The method of claim 1, wherein the sensor has a plurality of output channels,
And a multiplexer connected to the plurality of output channels to respective inputs and sequentially outputting the plurality of sensor signals to the converter in a time division manner according to a clock applied from a clock generator.

The method of claim 1, further comprising a first impedance element for preventing the sensor signal from flowing into the speaker unit, and a second impedance element for preventing the audio signal from flowing into the ADC. Receiver system.

9. The method of claim 8, wherein one end of the first impedance element is connected to one end of the primary coil of the first transformer and the first core, and the other end of the first impedance element is connected to the secondary coil of the first transformer. One end of the first coil of the first transformer is connected to the output of the converter, the other end of the secondary coil of the first transformer is connected to the speaker unit, and the second impedance element One end is connected to one end of the primary coil and the first core of the second transformer, the other end of the second impedance element is connected to one end of the secondary coil of the second transformer, and the primary coil of the second transformer The other end is connected to the processor, and the other end of the secondary coil of the second transformer is connected to the ADC.

The receiver system according to any one of claims 2 to 9, wherein the DC power supply unit, the second transformer, the ADC, and the processor are included in a dongle.