JP3412306B2 - Wireless device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless device comprising an external audio input / output device and a wireless device main body, and more particularly to a wireless device in which the external audio input / output device and the wireless device main body are connected by a plug and a jack. It is a thing.

[0002]

2. Description of the Related Art In recent years, a wireless device such as a mobile phone is equipped with a jack for connecting an external voice input / output device such as a handsfree set so that a user can talk without holding the wireless device. Has become mainstream.

FIG. 5 is a block diagram showing a conventional radio apparatus. In the figure, 1 is a hands-free external voice input / output device, 2 is a plug for inserting the external voice input / output device 1, and 3 is a jack for connecting the external voice input / output device 1 via a plug 2. Reference numeral 4 is a speaker output terminal of the jack 3; 5 is a microphone input terminal of the jack 3; 6 is a radio section for converting a voice signal into a radio signal or a radio signal into a voice signal; 7 is a radio section for receiving a voice signal from the microphone 9; 6 is an audio processing unit for sending an audio signal from the wireless unit 6 to the speaker 10, and 8 is an antenna for transmitting or receiving an electromagnetic wave of the wireless signal. In FIG. 5, the plug 2, the microphone 9 and the speaker 10 constitute the external voice input / output device 1, and the jack 3, the radio unit 6, the voice processing unit 7 and the antenna 8 constitute the radio device main body.

The operation of the radio apparatus of FIG. 5 configured as above will be described. The antenna 8 of the main body of the radio device receives radio waves from the outside and obtains radio wave reception signals (radio signals). This wireless signal is converted into an audio signal by the wireless unit 6 and sent to the audio processing unit 7. The audio signal is output from the audio processing unit 7 to the speaker 10 via the jack 3 and the plug 2. The audio signal output from the microphone 9 is input to the audio processing unit 7 via the plug 2 and the jack 3, and then to the wireless unit 6 to become a wireless signal. This radio signal is transmitted as a radio wave from the antenna 8 to the outside. In this way, it becomes possible to have a conversation with the other party via the wireless line. Further, since the external voice input / output device 1 is electrically coupled to the wireless device main body by inserting the plug 2 into the jack 3 of the main body, it is possible to have a conversation with the other party without holding the wireless device main body. The microphone 9 and the speaker 10 are supported by a person's head like headphones, for example.

[0005]

However, in the conventional wireless device, when the plug 2 is inserted into the jack 3, the speaker output terminal 4 and the microphone input terminal 5 of the jack 3 are inserted through the microphone terminal of the plug 2. There is a moment when a short circuit occurs.

When the speaker output terminal 4 of the jack 3 and the microphone input terminal 5 are short-circuited, a loop is formed between the speaker output terminal 4, the microphone input terminal 5 and the voice processing section 7, howling occurs, and the radio section 6 is turned on. Howling is heard from the speaker of the other party via the telephone.

A short circuit and howling between the speaker output terminal 4 and the microphone input terminal 5 will be described with reference to FIGS. 6 to 9. 6 is a configuration diagram showing a separation step before inserting the plug 2 into the jack 3, FIG. 7 is a configuration diagram showing a first step in the process of inserting the plug 2 into the jack 3, and FIG. FIG. 9 is a configuration diagram showing the second stage of the inserting process, and FIG. 9 is a configuration diagram showing the completion stage after the plug 2 is completely inserted into the jack 3. 6 to 9, 2
Is a plug of the external audio input / output device 1, 2a is a microphone terminal of the plug 2, 2b is a speaker terminal of the plug 2, 2c is a ground terminal of the plug 2, 3 is a jack of the wireless device body, 3a
Is a grounding terminal in the jack 3, 14 to 17 are jacks 3
Is the terminal inside.

In the separation stage of FIG. 6, the terminals 14 and 15 are in contact with each other and the terminals 16 and 17 are in contact with each other. In the first stage of FIG. 7, the microphone terminal 2a of the plug 2 is in contact with the terminal 14 and the terminal 17 while the terminals 14 and 15 are in contact with each other and the terminals 16 and 17 are in contact with each other. At this time, the terminals 14 to 17 are short-circuited via the microphone terminal 2a,
Howling occurs. In the second stage of FIG. 8, the plug 2
Is further inserted into the jack 3, and terminals 16 and 17
However, the terminals 14 and 15 are still in contact with each other, and the terminals 14 and 17 are in contact with each other via the microphone terminal 2a. Howling does not stop at this time. At the completion stage of FIG. 9, the plug 2 is completely inserted into the jack 3, the terminal 17 contacts the speaker terminal 2b of the plug 2, the terminals 14 and 15 are separated, and the howling stops.

When the speaker output terminal 4 of the jack 3 and the microphone input terminal 5 are short-circuited in this way, howling occurs. If the plug 2 is inserted into the jack 3 with the earphone of the external audio input / output device 1, that is, the speaker 10 set in the ear, a loud sound may be suddenly heard from the speaker 10 of the external audio input / output device 1. is there.

As described above, the conventional wireless device has a problem that when the external voice input / output device 1 is connected to the jack 3 during a call, the other party hears howling. At the time of connection with the jack 3, there was a problem that a loud sound was suddenly heard from the speaker 10.

The present invention solves the above-mentioned conventional problems. When the plug of the external voice input / output device is connected to the jack of the main body of the wireless device, the other party does not hear howling and the speaker is used. It is an object of the present invention to provide a wireless device that does not suddenly output a loud sound to the ear.

[0012]

In order to achieve this object, a wireless device according to claim 1 of the present invention is an external voice input / output.
A jack for connecting the device, a voice processing unit for processing a voice signal, a radio unit for converting a voice signal into a radio signal or a radio signal for converting into a voice signal, and transmitting or receiving a radio wave of a radio signal What is claimed is: 1. A wireless device comprising a wireless device body having an antenna , a plug connected to a jack, a microphone for voice input, and an external voice input / output device having a speaker for voice output. A short circuit detection circuit that detects a short circuit between the speaker output terminal and the microphone input terminal, and this short circuit detection circuit detects a short circuit.
Sound that blocks the audio signal output from the microphone when
And a blocking circuit .

According to a second aspect of the present invention, there is provided a wireless device having the basic configuration according to the first aspect , wherein the jack switch is used.
Short to detect a short circuit between the peaker output terminal and the microphone input terminal
The audio processing unit has a short circuit detection circuit
Muting the audio signal output to the speaker when it is detected
It has a configuration including a silencer circuit .

[0014]

[0015]

With the above construction, the short circuit detects the short circuit between the speaker output terminal of the jack and the microphone input terminal, so that it is possible to prevent a defective operation occurring when the speaker output terminal and the microphone input terminal are short-circuited. It will be possible.

When the short circuit detection circuit detects a short circuit between the speaker output terminal and the microphone input terminal, the voice blocking circuit blocks the voice signal output from the microphone, so that howling does not occur.

Furthermore, when the short circuit detection circuit detects a short circuit between the speaker output terminal and the microphone input terminal, the silence circuit is designed to silence the output audio signal from the audio processing unit, so that the speaker suddenly hears. No loud sound will be output.

[0018]

【Example】

(Embodiment 1) A first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a radio apparatus according to the first embodiment of the present invention. In FIG. 1, 1 is an external audio input / output device, 2 is a plug, 3 is a jack, 4 is a speaker output terminal, 5 is a microphone input terminal, 6 is a wireless unit, 7 is a voice processing unit, 8 is an antenna, and 9 is a microphone. Reference numeral 10 denotes a speaker, which are similar to those shown in FIG. Reference numeral 11 denotes a short circuit detection circuit that detects a short circuit between the speaker output terminal 4 and the microphone input terminal 5 that occurs when the plug 2 is inserted into the jack 3.

In FIG. 1, when a short circuit occurs between the speaker output terminal 4 and the microphone input terminal 5, the short circuit detection circuit 11 outputs a short circuit detection signal a to the audio processing section 7.

FIG. 2 is a circuit diagram showing details of the short circuit detection circuit 11 of FIG. In FIG. 2, 12 is a resistor 12a
Is a resistor unit, 13 is a transistor unit including a transistor 13a and a resistor 13b, and 13c is a resistor 1
A power supply terminal for supplying power to the transistor 13a via 3b, 14 to 17 terminals in the jack 3 for connecting the external audio input / output device 1, 18 a fixed microphone in the wireless device main body, and 19 a fixed microphone 18 Power source terminal for supplying electric power to 19a, a resistor of the fixed microphone 18, 20a a speaker amplifier for amplifying the audio signal from the audio processing unit 7 and outputting it to the speaker 10, 20b a fixed speaker in the wireless device main body, and 20c. Is an external audio input amplifier that amplifies the audio signal from the microphone 9, 20d is a fixed microphone amplifier that amplifies the audio signal from the fixed microphone 18, and the short-circuit detection circuit 11 in FIG. Thirteen
Consists of. In addition, the speaker output terminal 4 of FIG.
6 and 17, corresponding to the microphone output terminal 5 terminals 14 and 15
Corresponding to. In FIG. 1, reference numerals 18 and 19
The description of the components a and 20a to 20d is omitted.

Next, the operation of the radio apparatus shown in FIG. 2 will be described. When the plug 2 of FIG. 1 is inserted into the jack 3, there is a moment when the terminals 14 to 17 of the jack 3 are short-circuited.
14 is at a high level due to the voltage supply from the power supply terminal 19, so that the transistor 13a of the transistor section 13 of the short circuit detection circuit 11 is on and the collector potential of the transistor 13a, that is, the output signal a is at a low level.

When the terminals 14 to 17 of the jack 3 are short-circuited when the plug 2 is inserted into the jack 3, the resistor section 12 of the short-circuit detection circuit 11 brings the terminal 14 of the jack 3 to a low level (resistors 12a and 19a. However, the value of the resistor 12a is extremely smaller than the value of the resistor 19a, and the potential of the terminal 14 is extremely low), the transistor 13a is turned off, and the output signal a of the transistor 13a becomes high level. Become. In this way, the transistor 13
When the output signal a of a changes from low level to high level, a short circuit between terminals of the jack 3 is detected.

As described above, according to this embodiment, since the short circuit between the speaker output terminal 4 of the jack 3 and the microphone input terminal 5 is detected by the short circuit detection circuit 11, the speaker output terminal 4 and the microphone input terminal 5 are detected. It is possible to prevent a defective operation, such as howling, which occurs at the time of short-circuiting with 5.

(Embodiment 2) FIG. 3 is a circuit diagram showing a radio apparatus according to a second embodiment of the present invention, showing a howling stop circuit as a voice blocking circuit. In FIG. 3, 12 is a resistor part, 12 a is a resistor, 13 is a transistor part, 14 to 17 are terminals, 18 is a fixed microphone, 19
Is a power supply terminal, 19a is a resistor, 20a is a speaker amplifier, 20b is a fixed speaker, 20c is an external voice input amplifier, and 20d is a fixed microphone amplifier. Since these are the same as those in FIG. The description is omitted. Reference numeral 21 is a howling stop circuit (audio blocking circuit), 22 and 23 are transistors that form the howling stop circuit 21, 24 and 25 are power supply terminals that supply power to the transistors 22 and 23, and 26 is a collector of the transistor 22 and external sound input. Reference numeral 27 is a connection point to which the input side of the amplifier 20c is connected, and 27 is a connection point to which the collector of the transistor 23 and the input side of the fixed microphone amplifier 20d are connected.

Next, the operation of the radio apparatus shown in FIG. 3 will be described. When the terminals 14 to 17 of the jack 3 are not short-circuited, the short-circuit detection signal a from the transistor unit 13 of the short-circuit detection circuit 11 is low level as described above, and the base potential of the transistors 22 and 23 of the howling stop circuit 21 is low. Becomes low level, and the transistors 22 and 23 are off. Therefore, the connection points 26 and 27 are in a state having nothing to do with the howling stop circuit 21 (open state), and the signals on the connection points 26 and 27 are input to the amplifiers 20c and 20d without any interference. To be done.

When the terminals 14 to 17 of the jack 3 are short-circuited by inserting the plug 2 of FIG. 1 into the jack 3, the short-circuit detection signal a from the transistor section 13 becomes high level and the transistors 22 and 23 are turned on. Therefore, the potentials at the connection points 26 and 27 become low level. Connection point 2
When the potentials of 6 and 27 become low level, the external voice input amplifier 20c and the fixed microphone amplifier 20d are turned off (because the input side is cut off), so that the connection point 26,
If 27 is open, terminals 14 to 1 of jack 3
Howling caused by the short circuit of 7 is cut.

As described above, according to this embodiment, when the short circuit detection circuit 11 detects a short circuit between the speaker output terminal 4 and the microphone input terminal 5, the howling stop circuit 21 outputs the audio signal output from the microphone 9. Since it is blocked, howling does not occur.

(Embodiment 3) FIG. 4 is a circuit diagram showing a radio apparatus according to a third embodiment of the present invention, showing a voice processing section having a silence circuit. In the figure, 7 is a voice processing unit, 12 is a resistor unit, 12a is a resistor, 13 is a transistor unit, 14 to 17 are terminals, 18 is a fixed microphone, 19 is a power supply terminal, 19a is a resistor, and 20a is a speaker. An amplifier, 20b is a fixed speaker, 20c is an external voice input amplifier, and 20d is a fixed microphone amplifier. Since these are similar to those in FIGS. 1 and 2, the same reference numerals are given and description thereof is omitted.

The short circuit detection signal a from the transistor section 13 of the short circuit detection circuit 11 is input to the voice processing section 7 and the terminal 1
Notify short circuit of 4 to 17. When the terminals 14 to 17 are short-circuited, the silence circuit (not shown) of the audio processing unit 7 mutes the output side to the speaker amplifier 20a. As a result, the output of the audio signal from the audio processing unit 7 to the speaker 10 is cut off, and when the terminals 14 to 17 are short-circuited, the speaker 10 suddenly outputs a loud sound to the ear. Will not occur.

As described above, according to the present embodiment, when the short circuit detection circuit 11 detects a short circuit between the speaker output terminal 4 and the microphone input terminal 5, the silence processing circuit of the voice processing section 7 causes the voice processing section 7 to output Since the output audio signal of is silenced, the speaker 10 does not suddenly output a loud sound to the ear.

[0032]

As described above, according to the present invention, the short circuit between the speaker output terminal of the jack and the microphone input terminal is provided by providing the short circuit detection circuit for detecting the short circuit between the speaker output terminal of the jack and the microphone input terminal. Since the detection is performed, it is possible to realize a wireless device that can prevent a defective operation that occurs when the speaker output terminal and the microphone input terminal are short-circuited.

Further, by providing the audio blocking circuit for blocking the audio signal output from the microphone when the short circuit detecting circuit detects the short circuit, the short circuit detecting circuit detects the short circuit between the speaker output terminal and the microphone input terminal. At this time, since the audio signal output from the microphone is blocked, it is possible to realize a wireless device in which howling does not occur when the speaker output terminal of the jack and the microphone input terminal are short-circuited.

Furthermore, by providing the sound processing section with a silencer circuit that silences the audio signal output to the speaker when the short circuit detection circuit detects a short circuit, the short circuit detection circuit operates as a speaker output terminal and a microphone input terminal. When a short circuit is detected, the audio signal output from the audio processor is muted, so when the jack speaker output terminal and the microphone input terminal are short-circuited, a loud sound is suddenly output from the speaker to the ear. It is possible to realize a wireless device that is not operated.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a wireless device according to a first embodiment of the present invention.

FIG. 2 is a circuit diagram showing the short-circuit detection circuit of FIG. 1 in detail.

FIG. 3 is a circuit diagram showing a wireless device according to a second embodiment of the present invention.

FIG. 4 is a circuit diagram showing a wireless device according to a third embodiment of the present invention.

FIG. 5 is a block diagram showing a conventional wireless device.

FIG. 6 is a configuration diagram showing a separation step before inserting a plug into a jack.

FIG. 7 is a configuration diagram showing a first stage of a process of inserting a plug into a jack.

FIG. 8 is a configuration diagram showing a second stage of the process of inserting the plug into the jack.

FIG. 9 is a configuration diagram showing a completion stage in which the plug is completely inserted into the jack.

[Explanation of symbols]

1 External audio input / output device 2 plugs Three jacks 4 speaker output terminals 5 Microphone input terminal 6 radio section 7 Audio processing unit 8 antenna 9 microphone 10 speakers 11 Short circuit detection circuit 12 Resistor section 12a, 13b, 19a resistors 13 Transistor part 13a, 22 and 23 transistors 13c, 19, 24, 25 Power supply terminal 14 to 17 terminals 18 fixed microphone 20a speaker amplifier 20b fixed speaker 20c External audio input amplifier 20d fixed microphone amplifier 21 Howling stop circuit 26, 27 connection points

Claims (2)

(57) [Claims] 1. A jack for connecting an external voice input / output device, a voice processing unit for processing a voice signal, a radio unit for converting a voice signal into a radio signal or a radio signal into a voice signal, and the radio signal. A radio device body having an antenna for transmitting or receiving radio waves, a plug connected to the jack, and a microphone for voice input,
A wireless device comprising an external audio input / output device having a speaker for audio output, wherein a short circuit detection circuit for detecting a short circuit between a speaker output terminal of the jack and a microphone input terminal, and the short circuit detection circuit. When a short circuit is detected
Audio blocking that blocks the audio signal output from the microphone
A wireless device including a circuit . 2. A jack for connecting an external audio input / output device.
The audio signal processing unit that processes the audio signal,
A radio unit that converts radio signals or voice signals into voice signals
The radio signal to be transmitted or received by radio wave.
A wireless device body having an antenna and the jack
Plug to be connected to the microphone, a microphone for voice input,
An external audio input / output having a speaker for outputting audio
A wireless device comprising a device, the
Short circuit that detects a short circuit between the speaker output terminal and the microphone input terminal
A wireless communication device , wherein the audio processing unit includes a silence circuit that silences an audio signal output to the speaker when the short circuit detection circuit detects a short circuit. .