JP3990353B2 - Inspection method of communication equipment having voice output function - Google Patents

Description

  The present invention relates to an inspection method for inspecting a circuit related to a voice input / output function of a communication device such as a mobile phone having a voice input / output function.

  The mobile phone has an audio input unit such as a microphone and an audio output unit such as a speaker and a headphone terminal. Accordingly, in the inspection process in manufacturing the mobile phone, the inspection of the voice path including the path from the voice input unit to the control unit and the path from the control unit to the voice output unit is also performed. Audio path inspection means that, for example, audio output is not performed due to disconnection, poor soldering, or a terminal-to-terminal bridge between the audio input unit and the audio output unit and the control unit. This is a test for detecting a problem that voice input is not performed. If the time required for the inspection process is shortened, the manufacturing time is shortened. Therefore, in order to improve the productivity of the mobile phone, it is desired to shorten the voice path inspection time.

  In the cellular phone, as a voice path, a path from the voice input unit to the radio unit through the control unit (upstream path) and a path from the radio unit to the voice output unit through the control unit (downstream path) )). In addition to the voice communication path, there is also a mobile phone having an acoustic reproduction path for outputting an incoming melody or the like to the voice output unit based on data held by the control unit. Hereinafter, a circuit existing between the control unit, the voice input unit, and the voice output unit in the voice communication path is referred to as a voice communication function circuit. A circuit existing between the control unit and the audio output unit in the sound reproduction path is referred to as a sound reproduction circuit.

  In the inspection of the voice communication path, the control signal that is input to the voice input unit and passed through the upstream path is folded back by the control unit, the folded signal is passed through the downstream path, and the signal output to the voice output unit is sent to the voice input unit. A loopback test is performed to compare with the input signal. For example, Patent Document 1 shows an example in which a loopback inspection is performed.

Japanese Unexamined Patent Publication No. Hei 4-296156 (paragraph 0006, FIG. 1)

  6 and 7 are block diagrams showing an example of an inspection method for inspecting the voice communication function circuit and the sound reproduction circuit in the mobile phone. 6 and 7, the mobile phone 200 is capable of inputting and outputting audio signals, such as a voice input unit 40 such as a microphone that inputs voice to a communication partner, a speaker such as a speaker that outputs voice from the communication partner, and the like. A headphone jack 60 having an interface for connecting a device integrated with an earphone / microphone, a CPU 80 for general control such as controlling an LSI so that audio can be transmitted and received, and AD conversion for converting an audio signal of an analog signal into a digital signal And an audio IC 70 having a DA converter for changing the digital signal into an analog audio signal, a radio unit 90 having a function of converting the audio signal into a radio signal, and an FM sound source for outputting sound data such as a ring tone LSI 100 is included. The CPU 80 constitutes a control unit together with a memory for storing programs and data (including data corresponding to the acoustic digital output data generated by the FM tone generator LSI 100).

  The audio IC 70 sets the amplitude (level) of the audio signal (upstream audio signal) to the communication partner to a predetermined value, and sets the amplitude of the audio signal (downstream audio signal) from the communication partner to a predetermined value. Down path gain setting section 72, audio circuit gain setting section 73 for setting the amplitude of output data of FM tone generator LSI 100 to a predetermined value, and amplification of L (left) channel and R (right) channel of the signal output to headphone jack 60 An HP (Head Phone) amplifying unit (headphone amplifying unit) 74 and a switch unit 75 for turning on the HP amplifying unit. The CPU 80 also includes a switch 81 for returning the upstream audio signal as the downstream audio signal and a DSP (digital signal processor) 82 for encoding the digital audio signal and decoding the encoded data into the digital audio signal. ing. Inside the CPU 80, the switch 81 is provided in front of the DSP 82 (on the voice communication function circuit side). Note that the switch 81 is realized by a function of connecting or blocking a signal path inside the CPU 80.

  Hereinafter, the path from the MICP (Microphone Positive) terminal (positive microphone input terminal) to which the audio signal from the audio input unit 40 is input in the audio IC 70 to the switch 81 of the CPU 80 is referred to as an upstream audio path 78, and the switch 81 of the CPU 80 A path from a RECOP (Receiver Output Positive) terminal (positive side reception output terminal) that outputs an audio signal to the audio output unit 50 is referred to as a downstream audio path 79. A circuit existing in the upstream voice path 78 is called an upstream voice communication function circuit, and a circuit existing in the downstream voice path 79 is called a downstream voice communication function circuit. The voice communication function circuit is composed of an uplink voice communication function circuit and a downlink voice communication function circuit.

  The CPU 80 gives a control signal to the audio IC 70 through a serial interface (serial IF) 82. Further, the CPU 80 gives a control signal to the FM tone generator LSI 100 through the control signal line 83. The acoustic digital output data which is data such as the incoming melody from the FM tone generator LSI 100 is supplied to the audio IC 70 by the audio IF 101.

  TP10, TP20, and TP30 indicate test points for inspecting the voice communication function circuit and the sound reproduction circuit. The TP 10 is set on a line (HPOL terminal line) between an HPOL (Head Phone Output Left Channel) terminal (left headphone output terminal) which is an output terminal of the HP amplifier 74 in the audio IC 70 and the headphone jack 60. The TP 20 is set on a line (MICP terminal line) between the MICP terminal and the audio input unit 40 in the audio IC 70. The TP 30 is set on a line (RECOP terminal line) between the RECOP terminal and the audio output unit 50 in the audio IC 70.

  An inspection program is installed in the control personal computer (control PC) 300. The control PC 300 outputs an inspection control command to the mobile phone 200 via the control line 301 in accordance with the inspection program. Further, a control signal for inspection is output to the inspection jig 400 via the control line 302. The control lines 301 and 302 are cables installed between the control PC 300, the mobile phone 200, and the inspection jig 400 at the time of inspection.

  The inspection jig 400 includes an audio analyzer 410 as a level measuring instrument, and measures the frequency and level of an inspection signal output from the mobile phone 200. The inspection jig 400 includes a switch unit 451 for inputting either the signal from TP10 or the signal from TP30 to the audio analyzer 410, and a switch unit 452 for giving a signal to TP20.

  FIG. 6 shows a connection state when the voice communication function circuit is inspected. When inspecting the voice communication function circuit, the control PC 300 outputs a first control signal in response to an instructor's command operation. The inspection jig 450 outputs a low-frequency analog signal as an inspection signal according to the first control signal, and sets the switch unit 452 to a state where the low-frequency analog signal is input to the TP20. The inspection signal is, for example, a sine wave signal having a level of −40 dBm at 1 kHz. The control PC 300 outputs a second control signal. The inspection jig 450 sets the switch unit 451 to a state in which the signal from the TP 10 is input to the audio analyzer 410 according to the second control signal.

  Further, the control PC 300 turns on the switch 81 and outputs a control signal to the CPU 80 for instructing the CPU 80 to execute control for setting the predetermined gain to the upstream path gain setting unit 71 and the downstream path gain setting unit 72. To do.

  Then, as shown in FIG. 6, the signal input from the audio analyzer 410 to the TP20 passes through the upstream voice communication function circuit, and is then folded back by the CPU 80. After passing through the downstream voice communication function circuit, the signal is input to the audio analyzer 410. A route is formed.

  The inspector checks whether the frequency and level of the signal measured by the audio analyzer 410 are the desired frequency and the expected level. The desired frequency is the same as the frequency of the signal generated in the audio analyzer 410, and the expected level is a level corresponding to the gain set in the upstream path gain setting unit 71 and the downstream path gain setting unit 72. The inspector can inspect whether there is a problem in the voice communication function circuit of the mobile phone 200 based on the frequency and level of the signal measured by the audio analyzer 410.

  FIG. 7 shows a connection state when the sound reproducing circuit is inspected. When inspecting the sound reproduction circuit, the control PC 300 sends a control signal for instructing the switch unit 451 to input a signal from the TP 10 to the audio analyzer 410 in accordance with an instruction operation by the inspector. Output to the tool 450. Further, the control PC 300 outputs the predetermined sound digital output data to the FM tone generator LSI 100, causes the audio circuit gain setting unit 73 to set a predetermined gain, and executes control to turn on the HP amplification unit 74. A control command for instructing is output to the CPU 80.

  The inspector checks whether the frequency and level of the signal measured by the audio analyzer 410 are the desired frequency and the expected level. The desired frequency is the same as the frequency of the signal generated in the sound reproduction circuit, and the expected level is a level corresponding to the gain set in the audio circuit gain setting unit 73. The inspector can inspect whether there is a problem in the sound reproduction circuit of the mobile phone 200 according to the frequency and level of the signal measured by the audio analyzer 410.

  In the inspection method as described above, the measurement by the audio analyzer 410 is performed once when the voice communication function circuit is inspected, and the measurement by the audio analyzer 410 is performed once when the sound reproduction circuit is inspected. That is, in order to inspect the voice communication function circuit and the sound reproduction circuit of one mobile phone 200, the measurement by the audio analyzer 410 must be performed twice. The inspection time required for the inspection process is a time obtained by adding the time required for the measurement by the audio analyzer 410 to the stable waiting time until the measurement by the audio analyzer 410. However, since the measurement needs to be performed twice, the inspection time Will become longer.

  Accordingly, an object of the present invention is to provide an inspection method capable of shortening a period for inspecting a circuit related to the voice input / output function of a communication device having the voice input / output function.

An inspection method for a communication device having an audio output function according to the present invention includes a control unit that controls a radio unit that transmits and receives radio signals, an acoustic reproduction circuit that generates an audio signal based on data included in the control unit, and an audio input An upstream voice communication function circuit that inputs a voice signal from the communication unit and outputs it to the control unit for transmission to the communication partner, and a signal that is received from the communication partner via the control unit and that signal serves as a voice signal as a voice output unit A communication method including a voice communication function circuit including a downlink voice communication function circuit that outputs to a voice signal generated by the sound reproduction circuit is input to the test device and is input to the test device. and the audio signal is input to the uplink voice communication function circuit, folded in the control unit a signal that has passed through the upstream voice communication function circuit, through a signal folded back in the control unit in the downlink voice communication function circuit And measuring the frequency and level of the audio signal downlink voice communication function circuit outputs.

The inspection device measures the frequency and level of the audio signal output by the downlink audio communication function circuit, and the inspection control device sets the frequency and level of the audio signal measured by the inspection device to a desired frequency and an expected level. It is also possible to confirm whether or not a problem has occurred in the sound reproduction circuit or the voice communication function circuit.

The audio signal generated by the sound reproduction circuit and the audio signal output by the downstream audio communication function circuit may be handled as signals for the ground level.

The audio signal generated by the sound reproduction circuit and the audio signal output by the downstream audio communication function circuit may be handled as differential signals.

When the audio signal is handled as a differential signal, one of the differential outputs generated by the sound reproduction circuit is inverted in phase and input to the upstream audio communication function circuit, and the differential output output from the downstream audio communication function circuit is output. After one of the phases is inverted, the frequency and level of the audio signal output from the downstream audio communication function circuit are measured.

Giving a control command to the control unit, to output a sound digital output data from the FM sound source LSI included in the audio reproduction circuit, it may be caused to generate an audio signal to audio reproduction circuit on the basis of the sound digital output data.

The sound reproduction circuit may be adjusted to adjust the level of the signal input to the upstream voice communication function circuit.

  In the control unit, for example, the signal is folded before the digital signal processing unit included in the control unit.

  According to the present invention, since the inspection of the voice communication function circuit and the sound reproduction circuit can be completed in one measurement, a period for inspecting the circuit related to the voice input / output function of the communication device having the voice input / output function is increased. It can be shortened.

Embodiment 1 FIG.
Embodiments of the present invention will be described below. FIG. 1 is a block diagram for explaining a first embodiment of a communication device inspection method according to the present invention. In this embodiment, a mobile phone is used as an example of a communication device. The mobile phone has a function of transmitting / receiving audio signals and a function of outputting ringtones such as ringtones.

  The configuration of the mobile phone 200 shown in FIG. 1 is the same as the configuration shown in FIGS. The inspection jig 400 includes an audio analyzer 410 as a level measuring instrument, and measures the frequency and level of an inspection signal output from the mobile phone 200. The inspection jig 400 also includes a path for outputting a signal input from the TP10 to the TP20.

In the mobile phone 200 shown in FIG. 1, one of the two output terminals of the voice input unit 40 is grounded. One of the two input terminals of the audio output unit 50 is grounded, and one of the two input terminals of the headphone jack 60 is grounded. Therefore, in this embodiment, the audio signal generated by the sound reproduction circuit and the audio signal output by the downstream audio communication function circuit are treated as signals indicating a level with respect to the ground level.

  Next, the inspection method of this embodiment will be described with reference to the flowchart of FIG. The inspector first connects the inspection jig 400 connected to the control PC 300 to the mobile phone 200. Specifically, connection is made so that a signal input from TP 10 is output to TP 20, and connection is made so that a signal from TP 30 is input to audio analyzer 410.

  Then, the control PC 300 outputs a first control command to the mobile phone 200 via the control line 301 in accordance with the instructor's command operation (step S11). The control command is transmitted to the CPU 80 inside the mobile phone 200. The first control command executes control for causing the FM sound source LSI 100 to output predetermined acoustic digital output data, causing the audio circuit gain setting unit 73 to set a predetermined gain, and turning on the HP amplification unit 74. , A command for instructing the CPU 80.

  The CPU 80 causes the audio circuit gain setting unit 73 to set a predetermined gain (for example, a gain such that the output level becomes −40 dBm) with the serial IF 82 in accordance with the first control command, and the HP amplification unit 74. A control signal instructing to turn on is output to the audio IC 70. The audio IC 70 sets a predetermined gain in the audio circuit gain setting unit 73 according to the control signal, and turns the HP amplification unit 74 on. That is, the audio circuit gain setting unit 73 and the HP amplification unit 74 adjust the level of the audio signal input to the upstream audio communication function circuit.

  Further, the CPU 80 sends a control signal for instructing to output acoustic digital output data corresponding to a low-frequency analog signal (for example, a 1 kHz sine wave signal) through the control signal line 83 in accordance with the control command. Output to. The FM tone generator LSI 100 starts outputting the acoustic digital output data to the audio IC 70 in accordance with the control signal. By such setting, a low-frequency analog signal (for example, a sine wave signal having a level of −40 dBm at 1 kHz) is output from the HPOL terminal line (TP10).

  Next, the control PC 300 outputs a second control command to the mobile phone 200 via the control line 301 (step S12). The second control command is a command for instructing the CPU 80 to turn on the switch 81 and to execute control for causing the uplink path gain setting unit 71 and the downlink path gain setting unit 72 to set a predetermined gain.

  In response to the control command, the CPU 80 outputs, to the audio IC 70, a control signal that instructs the upstream path gain setting unit 71 and the downlink path gain setting unit 72 to set a predetermined gain using the serial IF 82. The audio IC 70 sets a predetermined gain in the uplink path gain setting unit 71 and the downlink path gain setting unit 72 according to the control signal. With such a setting, the signal input to the MICP terminal line (TP20) passes through the upstream voice communication function circuit and is turned back before the part that executes the digital signal processing inside the CPU 80, and the downstream voice communication function circuit A route that passes through the RECOP terminal line (TP30) is set.

  Accordingly, a low-frequency analog signal corresponding to the acoustic digital output data output from the FM sound source LSI 101 according to the instruction from the CPU 80 is output from the TP10, and the low-frequency analog signal is input to the TP20 by the inspection jig 400 (step S13). ). That is, the output signal of the sound reproduction circuit is input to the voice communication function circuit. The low-frequency analog signal input to TP20 is input to the audio analyzer 410 via TP30 through the upstream voice communication function circuit and the downstream voice communication function circuit.

  The inspector checks whether the frequency and level of the signal measured by the audio analyzer 410 are the desired frequency and the expected level (step S14). For example, the frequency and level of the signal measured by the audio analyzer 410 are output from the inspection jig 410 to the control PC 300, and the control PC 300 outputs the frequency of the signal measured by the audio analyzer 410. The level and the desired frequency and expected level set in advance in the control PC 300 may be automatically compared. And then. The inspection result may be displayed on the control PC 300 or output from the control PC 300. The inspection jig 410 may have a function for comparing the frequency and level of the signal measured by the audio analyzer 410 with a desired frequency and an expected level, and a function for displaying the inspection result.

  The desired frequency is a frequency having a tolerance of ± several% with respect to the frequency of the signal generated in the sound reproduction circuit. The expected level is a level corresponding to the gain set in the audio circuit gain setting unit 73, the uplink path gain setting unit 71, and the downlink path gain setting unit 72. Since the signal generated by the sound reproduction circuit passes through the uplink voice communication function circuit and the downlink voice communication function circuit and reaches the audio analyzer 410, the inspector has a problem with the voice communication function circuit and the sound reproduction circuit of the mobile phone 200 (for example, It is possible to inspect at a time whether there is no disconnection, soldering failure or bridge between terminals.

Embodiment 2. FIG.
FIG. 3 is a block diagram for explaining a second embodiment of the communication device inspection method according to the present invention. Also in this embodiment, a cellular phone is used as an example of a communication device.

  As shown in FIG. 3, the audio IC 70 has switch units 75 and 77 for branching the differential output of the audio circuit gain setting unit 73 (not shown in FIG. 1). The output of the switch unit 75 is input to the HP amplifying unit 74, and output from the HP amplifying unit 74 to the HPOL terminal (left headphone output terminal) and the HPOR (Head Phone Output Right Channel) terminal (right headphone output terminal) which are output terminals. Is done. The audio IC 70 also includes an SPK amplification unit (speaker amplification unit) 76 that is an amplification unit for a signal output to the audio output unit 51 such as a speaker, and SPKOP (Speaker Output Positive) that is an output terminal of the SPK amplification unit 76. A terminal (positive speaker output terminal) and an SPKON (Speaker Output Negative) terminal (negative speaker output terminal) (not shown in FIG. 1). The output of the switch unit 77 is input to the SPK amplifying unit 76, and is output from the SPK amplifying unit 76 to the SPKOP terminal and the SPKON terminal. That is, the audio IC 70 can output a differential signal between the HPOL terminal and the HPOR terminal, and can output a differential signal between the SPKOP terminal and the SPKON terminal.

In the voice communication function circuit, a differential signal can be input between the MICP terminal (positive microphone input terminal) to which the voice input unit 40 is connected and the MICN (Microphone Negative) terminal (negative microphone input terminal). Yes, a differential signal can be output between a RECOP terminal (positive side reception output terminal) to which the audio output unit 50 is connected and a RECON (Receiver Output Negative) terminal (negative side reception output terminal). That is, in this embodiment, the audio signal generated by the sound reproduction circuit and the audio signal output by the downstream audio communication function circuit are handled as differential signals.

  In this embodiment, the TP 10 is set on a line (SPKOP terminal line) between the SPKOP terminal and the audio output unit 51. TP11 is set on a line (SPKON terminal line) between the SPKON terminal and the audio output unit 51. Also, TP21 is set on a line (MICN terminal line) between the MICN terminal and the audio input unit 40, and TP31 is set on a line (RECON terminal line) between the RECON terminal and the audio output unit 50. Is done.

  As in the case of the first embodiment, the inspection jig 420 has a path for outputting the signal input from the audio analyzer 410, TP10 to the TP20, and a path for inputting the signal from the TP30 to the audio analyzer 410. Including. Furthermore, in this embodiment, a phase inversion circuit 430 that inverts the phase of the signal input from TP11, a path for outputting the output signal of the phase inversion circuit 430 to TP21, and a phase inversion circuit that inverts the phase of the signal input from TP31. 440 and a path for inputting a signal from TP31 to the audio analyzer 410.

  In other words, in this embodiment, a low-frequency analog signal as a differential signal output from the sound reproduction circuit is input to the upstream voice communication function circuit, and the differential signal is folded inside the CPU 80, so that the downstream voice communication function circuit The differential signal output from is measured by the audio analyzer 410. In the phase inversion circuits 430 and 440, the phase of the signal output from the SPKOP terminal and the phase of the signal output from the SPKON terminal are shifted by 180 °, and the phase of the signal output from the RECOP terminal is output from the RECON terminal. This is because the signal is 180 degrees out of phase.

  The phase inversion circuits 430 and 440 are realized by an inversion circuit using an operational amplifier 431 as shown in FIG. When the circuit shown in FIG. 4 is used as the phase inverting circuit 430, the input signal is a signal from TP11, and the output signal is a signal output to TP21. When the circuit shown in FIG. 4 is used as the phase inverting circuit 440, the input signal is a signal from the TP 31 and the output signal is a signal output to the audio analyzer 410.

  Next, the inspection method of this embodiment will be described with reference to the flowchart of FIG. The inspector first connects the inspection jig 420 connected to the control PC 300 to the mobile phone 200. Specifically, connection is made so that signals input from TP10 and TP11 are output to TP20 and TP21, and connection is made so that signals from TP30 and TP31 are input to the audio analyzer 410. However, in the inspection jig 420, the signal from TP 10 is output to TP 21 after being phase-inverted by the phase inversion circuit 430. Further, the signal from TP 31 is phase-inverted by the phase inversion circuit 440 and then input to the audio analyzer 410.

  Then, the control PC 300 outputs a first control command to the mobile phone 200 via the control line 301 in response to the instructor's command operation (step S21). The first control command causes the FM tone generator LSI 100 to output predetermined acoustic digital output data, causes the audio circuit gain setting unit 73 to set a predetermined gain, and turns on the SPK amplification unit 76 by the switch unit 77 and switches This is a command for instructing the CPU 80 to execute control for turning off the HP amplification unit 74 by the unit 75.

The CPU 80 causes the audio circuit gain setting unit 73 to set a predetermined gain (for example, a gain at which the output level of the sound reproduction circuit is −40 dBm) by the serial IF 82 according to the control command, and the SPK amplification unit A control signal is output to the audio IC 70 for instructing to turn on the power amplifier 76 and turn off the HP amplifier 74. The audio IC 70 sets a predetermined gain in the audio circuit gain setting unit 73 in accordance with the control signal, turns on the SPK amplification unit 76, and turns off the HP amplification unit 74. Further, the CPU 80 sends a control signal instructing to output acoustic digital output data corresponding to a low-frequency analog signal (for example, a 1 kHz sine wave signal) through the control signal line 83 in accordance with the control command. To instruct. The FM tone generator LSI 100 starts outputting predetermined acoustic digital output data to the audio IC 70 in accordance with the control signal. By such setting, a low-frequency analog signal (for example, a sine wave signal having a level of −40 dBm at 1 kHz) is output as a differential output from the SPKOP terminal line (TP10) and the SPKON terminal line (TP11).

  Next, the control PC 300 outputs a second control command to the mobile phone 200 via the control line 301 (step S22). The second control command is a command for instructing the CPU 80 to turn on the switch 81 and to execute control for causing the uplink path gain setting unit 71 and the downlink path gain setting unit 72 to set a predetermined gain.

  In response to the second control command, the CPU 80 outputs, to the audio IC 70, a control signal that instructs the upstream IF gain setting unit 71 and the downlink path gain setting unit 72 to set a predetermined gain using the serial IF 82. The audio IC 70 sets a predetermined gain in the uplink path gain setting unit 71 and the downlink path gain setting unit 72 according to the control signal. With this setting, the differential signal input between the MICP terminal line (TP20) and the MICN terminal line (TP21) passes through the upstream voice communication function circuit, and before the digital signal processing unit in the CPU 80. Is routed through the downstream voice communication function circuit to establish a route between the RECOP terminal line (TP30) and the RECON terminal line (TP31).

  Therefore, a low-frequency analog signal corresponding to the acoustic digital output data output from the FM sound source LSI 101 in response to an instruction from the CPU 80 is output as a differential signal between TP10 and TP11. Is input to TP20 and the output of TP11 is phase-inverted before being input to TP21 (step S23). That is, a differential signal that is a differential output of the sound reproduction circuit is input as a differential input to the audio communication function circuit. Further, the differential signal input to the voice communication function circuit is input to the inspection jig 420 via the upstream voice communication function circuit and the downstream voice communication function circuit via TP30 and TP31. In the inspection jig 420, the output of TP 30 is unchanged, and the output of TP 31 is inverted in phase and input to the audio analyzer 410.

  The inspector checks whether the frequency and level of the signal measured by the audio analyzer 410 are the desired frequency and the expected level (step S24). For example, the frequency and level of the signal measured by the audio analyzer 410 are output from the inspection jig 420 to the control PC 300, and the control PC 300 outputs the frequency of the signal measured by the audio analyzer 410. The level and the desired frequency and expected level set in advance in the control PC 300 may be automatically compared. And then. The inspection result may be displayed on the control PC 300 or output from the control PC 300. Further, the inspection jig 420 may have a function of comparing the frequency and level of the signal measured by the audio analyzer 410 with a desired frequency and an expected level, and a display function of the inspection result.

  As described above, also in this embodiment, since the signal generated by the sound reproduction circuit passes through the upstream voice communication function circuit and the downstream voice communication function circuit and reaches the audio analyzer 410, the inspector can check the voice of the mobile phone 200. Whether there is a problem (for example, disconnection, poor soldering, inter-terminal bridge, etc.) in the communication function circuit and the sound reproduction circuit can be inspected at a time.

  In each of the above embodiments, a cellular phone is taken as an example of a communication device, but the present invention can be applied to all communication devices having an acoustic reproduction circuit and a voice communication function circuit.

  The present invention is particularly useful when testing a circuit related to a voice input / output function of a communication device such as a mobile phone having the voice input / output function.

It is a block diagram for demonstrating 1st Embodiment of the inspection method of the communication apparatus by this invention. It is a flowchart which shows operation | movement of 1st Embodiment. It is a block diagram for demonstrating 2nd Embodiment of the inspection method of the communication apparatus by this invention. It is a circuit diagram which shows the structural example of a phase inversion circuit. It is a flowchart which shows operation | movement of 2nd Embodiment. It is a block diagram which shows an example of the test | inspection method for test | inspecting the audio | voice communication functional circuit and sound reproduction circuit in a mobile telephone. It is a block diagram which shows an example of the test | inspection method for test | inspecting the audio | voice communication functional circuit and sound reproduction circuit in a mobile telephone.

Explanation of symbols

40 Audio input unit 50, 51 Audio output unit 60 Headphone jack 70 Audio IC
80 CPU
90 Radio unit 100 FM tone generator LSI
200 Mobile phone 300 Personal computer for control (control PC)
400, 420 Inspection jig 410 Audio analyzer

Claims (8)

A control unit that controls a radio unit that transmits and receives radio signals;
An acoustic reproduction circuit that generates an audio signal based on data included in the control unit;
An upstream voice communication functional circuit that outputs a voice signal from the voice input unit and outputs it to the communication partner for transmission to the communication partner, and a signal received from the communication partner is input via the control unit, and the signal is voiced An inspection method for inspecting a communication device including a voice communication function circuit including a downlink voice communication function circuit that outputs a signal to a voice output unit using an inspection device ,
The audio signal sound reproduction circuit has occurred is input to the inspection device, by inputting an audio signal input to the testing device in the uplink voice communications function circuit,
The signal passing through the upstream voice communication function circuit is turned back at the control unit,
The signal folded by the control unit is passed through the downstream voice communication function circuit,
A method for inspecting a communication device having an audio output function, comprising measuring a frequency and a level of an audio signal output from the downlink audio communication function circuit. An inspection method for communication equipment using an inspection control device connected to an inspection device,
The inspection device measures the frequency and level of the audio signal output from the downlink audio communication function circuit, and the inspection control device expects the frequency and level of the audio signal measured by the inspection device to be a desired frequency and level. The method for inspecting a communication device having an audio output function according to claim 1, wherein it is confirmed whether or not a problem has occurred in the sound reproduction circuit or the audio communication function circuit by checking whether the level is reached. The method for inspecting a communication device having an audio output function according to claim 1, wherein the audio signal reproduced by the sound reproduction circuit and the audio signal output by the downlink audio communication function circuit are handled as a signal with respect to a ground level. The method for inspecting a communication device having an audio output function according to claim 1 or 2, wherein the audio signal generated by the sound reproduction circuit and the audio signal output by the downstream audio communication function circuit are handled as differential signals. One of the differential outputs generated by the sound reproduction circuit is phase-inverted and input to the upstream voice communication function circuit, and one of the differential outputs output from the downstream voice communication function circuit is phase-inverted before the downstream voice communication function circuit The method for inspecting a communication device having an audio output function according to claim 4, wherein the frequency and level of the audio signal output by the apparatus are measured. Giving a control command to the control unit, to output a sound digital output data from the FM sound source LSI included in the audio reproduction circuit, according claim 1 for generating an audio signal to the audio reproduction circuit on the basis of the sound digital output data An inspection method for a communication device having the voice output function according to any one of items 5 to 6. The method for inspecting a communication device having an audio output function according to any one of claims 1 to 6, wherein the sound reproduction circuit performs level adjustment of a signal input to the uplink audio communication function circuit. The method for inspecting a communication device having an audio output function according to any one of claims 1 to 7, wherein the signal is turned back in front of a digital signal processing unit included in the control unit.

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