TWI228365B - Function detecting device for audio module - Google Patents

Abstract

A function detecting device for audio module includes a signal generator, a switch device and an audio signal detector for detecting the function of the audio module. The switch device is provided with multiple switches coupled to the input terminals and output terminals of the audio module, so as to enable the audio signals generated by the signal generator to enter the audio module via the selected input terminals according to the actual requirement and to be outputted via the selected output terminals. The signal generator includes an oscillator, a frequency divider, a low-pass filter and an attenuator. The baseband signal generated by the oscillator is frequency-divided by the frequency divider and then fed into the low-pass filter for being filtered to produce audio signals of different frequencies. The audio signals are applied to the attenuator for being attenuated by different degrees, thereby simulating the change of audio volume. On the other hand, the audio signal detector includes a peak detector and a frequency detector for detecting the peak value and the frequency of the audio signal. The capacitor of the peak detector is charged according to the audio signal so that the voltage of the capacitor is kept at the peak value of the audio signal for determining the peak value based thereon. Furthermore, the voltage of the capacitor is divided and compared with the audio signal to generate a pulse signal with a frequency equal to that of the audio signal, thereby being aware of the frequency of the audio signal. In addition to low cost, the present invention is provided with the features of excellent system integration capability, easy operation and having greatly decreased test time, thereby achieving the purpose of fast detection.

Description

1228365 V. Description of the invention (1) [Technical field to which the invention belongs] More particularly, the present invention relates to a detection device A function detection device for a voice module. [Previous technology] In recent years, the development of chaos technology has been rapidly progressing. The applications of GSM / GPRS voice modules can be seen in mobile phones, automobiles or various types of communication equipment. In the mass production of voice modules, in order to test the module's audio function, a coaxial cable (coaxial cab 1 e) must be used to test the module externally to a test machine. These test machines An example is the Agilent 8960 GSM Test Set. Please refer to Figure 1, which shows the situation of using a test machine to detect the voice module. During the measurement, the test machine 1 20 uses a coaxial cable to feed the voice signal As into the voice module 11 〇, and then the voice signal A s returns via the uplink path and the downlink path in the module (loop back) Test the machine 120 to analyze the difference between the voice signal AS before and after entering and exiting the voice module 110. After the analysis of the test machine 12 is completed, the test results can be returned to the personal computer 1 through the General Purpose Instrument Bus G PI B, and the staff can check whether the voice function is normal. In addition, the personal computer 100 can use the control signal CTRL to control the connection state of the voice module 110 to the external endpoint, so that the voice signal AS can enter the voice module 11 () from the selected input terminal according to the setting, and be controlled by The selected output is output to verify whether each voice channel is normal.

IM TW1225F (BenQ) .ptd Page 5 1228365 V. Description of the Invention (2), 凊 Refer to Figure 2, which shows the block diagram of the uplink channel and downlink traffic in the voice module. As shown in the figure, the voice module can be configured with several input terminals ^ IN2, "· ΙΝΜ 'to feed the voice signal AS into the uplink channel upp, such input terminals are, for example, head set microphones , Xi Kefeng or extended input terminal (auxiliary inpUt), etc., can control the voice signal according to the control 彳 5 CTRL… who enters. The uplink channel includes the signal converter 210, filter 220 and amplifier 230, voice After entering the uplink channel υρΡ, the signal converter 210 first converts the analog sounds into digital signals, and then filters and amplifies the signal. Circuit 2 40 is fed into the downstream channel 0. The next pass, the DNP includes a filter 25, an amplifier 26, a modulator 27, and a signal conversion state 28 for filtering digital signal, signal amplification, Modification and other processing, and then converted to analog signals by the signal converter 28, 'output OUT0, OUT2,. "OUTN output; Douzhong, this = out = if it is headphones, headphones, or expandable Output = Temple, = Sundial No. AS According to the control signal CTRL, it is selected by whom to output. It should be noted that after the voice-over circuit 24o is adjusted, the voice signal output by the upp can be fed into the downstream channel DNp, so only the voice signals at the end and the output end are added. By comparison, you can find out whether the voice function is normal according to the two ^ Yu! Generally speaking, it is judged whether the amplitude and frequency deviation between the front and back of the branch is too large as a judgment. ^ = Because the traditional voice function test depends on the test machine The cost of the test machine is high, which is a burden for the industry. In addition, the traditional test method takes a long time, and the negative battle of ^ / L is the production process.

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^ Severe output bottlenecks have greatly affected the speed of mass production of products. Therefore, it is necessary to develop another low-cost and easy-to-use detection device to improve the competitiveness of the product. [Summary of the Invention] 2 In view of this, the object of the present invention is to provide a voice module detection device to reduce the construction cost of equipment and improve the operation efficiency. The purpose of the present invention is to propose a function inspection of the voice module. The brief description of the device is as follows: I θ function detection device includes a signal generator, a switching device and a voice: tester to detect the function of the voice module. The configuration of the switch device reads #%, and the off σ is used to couple with the input terminal and output terminal of the voice module. The voice signal generated by the * and the generator can be selected by the selected crying signal according to the actual measurement requirements. The Erimamatsu group 'is output by the selected output terminal. The signal generates it ΛΑ ^ oscillating state, frequency divider, low-pass filter and attenuator. The T fundamental frequency signal of the oscillator is divided by the frequency divider and fed into a low-pass filter to filter X η 卩 I to generate different frequencies. Voice signal. The speech signal is made by the attenuator: the same way. Attenuation, to simulate the change in sound size. On the other hand, the, = i ^ detectors include a peak detector and a frequency detector, which are used to charge the audio signal at a rate. The capacitance of the peak detector is based on the peak value of the speech signal. It is maintained at the peak value of the speech signal as ^ ^ m. Furthermore, after the capacitance potential is divided, it can generate a pulse wave with the same frequency as the speech signal. Signal

TW1225F (BenQ) .ptd 1228365

Know the frequency of the voice signal. Understand that, in order to make the above-mentioned objects, features, and advantages of the present invention more obvious and easy, a preferred embodiment is given below in conjunction with the accompanying drawings for detailed description as follows: It shows a block diagram of a function detection device for a module according to a preferred embodiment of the present invention. The detection device for the voice function includes a signal generator 31o, a switching device 32o, and a voice signal detector 330. The voice signal detector 3 3 () is further equipped with a peak detector 334 and a frequency detector 335, which are respectively used to Measure the peak value (ypeak vaiue) and frequency of the speech signal. The switch device 32 has switches A1, A2, ... AM coupled to the input 钿 INI 'IN2, which can determine the on-state of the switch according to the control signal CTRL, so that the voice signal can be fed into the selected input terminal and enters the uplink. Channel UPP. In addition, the switch device 32 also has switches B1, B2, ..., BN coupled to the output terminals OUT1, OUT2, ... OUTN. These switches also determine the conduction state according to the control signal CTRL, so that the voice signal is switched by the sidetone. After f24〇 enters the downstream channel DNp, it can be output by the selected output terminal. The function of the L number generator 310 is to generate a speech signal AS whose amplitude and frequency can be adjusted to simulate the test speech. With the function of the switching device 320, the voice signal ... can enter the upstream channel UPP 'from the selected input terminal, enter the downstream channel DNp via the side tone circuit 240, and then output to the voice signal detector 330 from the selected output terminal. After the peak detector 334 and the frequency detector 335 receive the speech signal, the peak signal pv can be generated accordingly.

1228365 V. Description of the invention (5) and the frequency signal FS are used to compare the speech signal AS generated by the signal generator 31 〇 to determine whether the function of the voice module 丨 丨 〇 is normal. In addition, the circuit is also equipped with a self-check circuit 340, which is used to directly feed the δ tone signal a S generated by the signal generator 31 to the voice signal detector 3 3 〇 for peak and frequency measurement without voice. Module 1 丨 〇. If the amplitude and frequency of the detected voice signal are consistent with those generated by the signal generator 31, it means that the detection function of the voice signal detector 3 3 0 is normal, so the setting of the self-test circuit 3 4 〇 can be used as the voice module 11 〇 Used for system calibration before actual measurement. Please refer to FIG. 4, which shows a block diagram of the internal circuit of the signal generator 3. The purpose of the signal generator 310 is to generate a 500 ~ 4000Hz, 15mV ~ 5V string wave signal, which is used to simulate the input signal of speech. In practice, the fundamental frequency signal bs of 2.048 MHz can be generated by the oscillator 411, and then the fundamental frequency signal BS is divided by the frequency divider 413 (for example, 2/4/8/16) to generate a continuous square wave. This square wave is divided by 2 and fed into a low-pass filter = ter) 415 'to generate a speech signal As that meets the design requirements; p Among them, the fundamental frequency signal BS is first divided and then divided by 2 (divided twice). Ensure that a square wave with a duty cycle of 50% is generated; the function of the pass device 415 can generate a symmetrical sine wave signal (ie, 3 m. In addition, the attenuator 417 can make the amplitude of the speech signal ^ Minus to make it change between 15 hearts to 5 ¥, to change the size. Fan Dou ^ Refer to Figure 5 'It shows the voice signal detector 3 2 detector 334, the comparator 50 can change the voice The signal AS is compared with the capacitor ^ charge ... 1 C 'When the potential of the speech signal AS is higher, the comparator ⑽

1228365 Fifth invention description (6) = input = high level (high levei) to make transistor 9 conductive, voltage Vcc, capacitor c charge. Conversely, if the potential of the speech signal As is lower than the capacitance

The output of the comparator 50 is at a low level (i0w level), and the transistor Qp is closed to maintain the potential of the valley C. In this way, the capacitor potential can be kept at the maximum value of the speech signal AS, so the charging potential Vc of the capacitor C can be used as the peak signal pv. On the other hand, after the charging potential Vc is divided by the resistors R1 and R2, the potential VR2 of resistance = is fed to the comparator 55 and compared with the speech signal AS. The comparator can generate a pulse wave signal as a basis for frequency detection. Pulse wave signal H-rate signal FS. Please refer to FIG. 6, which shows the relationship between the speech signal AS and the electrical Y f frequency signal FS. Since the speech signal AS and the potential 2 are fed to the non-inverting input terminal and the inverting input terminal of the comparator 55, the output of the comparator when the potential of the signal AS is high is high level, and the output is low level. The frequency signal FS is formed. Because of the frequency H, the frequency of the speech signal AS can be known. The deafness needs to be noted. Since the potential VR2 is directly divided by the peak value of the speech signal AS, the potential VR2 is also synchronized. Adjusting and comparing ^ 55 will surely produce a pulse wave signal with a frequency equal to the speech signal. The voice function detection disclosed in the above embodiments of the present invention has the following advantages: 1. Place the clothes to v. 1. Replace the test machine with a simple circuit structure, which is ready for construction cost. j Dajintian reduced equipment 1. Shortened measurement time can effectively increase mass production rate.

TW1225F (BenQ), page 10, 1228365 V. Description of the invention (7) In summary, although the present invention has been disclosed as above with a preferred embodiment, it is not intended to limit the present invention. Various changes and modifications can be made without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope of the appended patent application.

TW1225F (BenQ) .ptd Page 11 1228365 Schematic description [Schematic description] Figure 1 shows the situation of using a test machine to detect the voice module. Figure 2 shows a block diagram of the upstream and downstream channels in the voice module. FIG. 3 is a block diagram of a function detection device for a voice module according to a preferred embodiment of the present invention. Figure 4 shows a block diagram of the internal circuit of the signal generator of Figure 3. FIG. 5 is a circuit diagram of the voice signal detector of FIG. 3. Figure 6 shows the relationship between the speech signal, the divided potential and the frequency signal. Description of drawing symbols 5 0, 5 5: Comparator I 0 0: Personal computer II 0: Voice module 1 2 0: Test machine 210, 280: Signal converter 220, 250: Filter 230, 260: Amplifier 240 : Bypass circuit 270: Toilet 31 0: Signal generator 320: Switching device 330: Voice signal detector

TW1225F (BenQ) .ptd Page 12 1228365 Brief description of the diagram 331: Peak detector 335: Frequency detector 340: Self-test circuit 41 1: Oscillator 41 3: Frequency divider 4 1 5: Low-pass filter 4 1 7: Attenuator AS: Voice signal GPIB: General instrument bus UPP: Upstream channel DNP: Downstream channel INI, IN2, INM: Input terminals OUT1, OUT2, OUTN: Output terminals

Al, A2, AM, Bl, B2, BN: Switch PV: Peak signal FS: Frequency signal C: Capacitance

Vc: charging potential Q: transistor VR2: potential

TW1225F (BenQ) .ptd Page 13

Claims (1)

1228365 6. Scope of patent application 1 · A function of a voice module to detect the UPunk path, a side-by-side two-day nuclear version includes one, one, s, Ί ρ τη; sidetone circuit and the following Order channel (d〇wniink path), Douzhong, to a plurality of input terminals, τ ϋ /, ^ 上 丁 通 运 连接 立 & gur ^ δ 海 下 仃 通 迢 is coupled to a plurality of output terminals, a The language σ 馈 is fed in by some round-in ends, and then passed through the upstream channel and the side-tone circuit 4 to the output ends. The function detection device of the voice module includes: = 关 名 置 'couple Connected to the input terminals and the output terminals; ^ L 产生 Generator 'is coupled to the switch device for generating the voice signal and feeding the voice signal into the uplink channel for the switch device; and A voice signal detector is coupled to the switching device, and is configured to receive the voice signals output from the output terminals and detect the peak value and frequency of the voice signals. 2 · The function detection device according to item 1 of the scope of patent application, wherein the signal generator includes: an oscillator for generating a fundamental frequency signal; a frequency divider coupled to the oscillator for The baseband signal is output after being divided; and a low-pass filter is coupled to the frequency divider to filter the baseband signal that has been divided down into a voice signal. 3. The function detection device as described in item 2 of the scope of patent application, wherein the frequency of the fundamental frequency signal is 2.048 MHz. 4. The function detection device as described in item 2 of the scope of patent application, of which page 1228365 6. The scope of patent application The signal generator further includes an attenuator coupled to the low-pass filter to adjust the voice The amplitude of the signal. 5. The function detection device according to item 4 of the scope of patent application, wherein the amplitude of the voice signal is between 15mV and 1.5V. 6. The function detection device according to item 1 of the scope of patent application, wherein the voice signal detector includes: a capacitor which is charged according to the voice signal so as to have a charging potential; and a comparator coupled to The capacitor and the output terminals are used to compare the voice signal with the charging potential to generate a pulse wave signal, wherein the pulse wave signal has the same frequency as the voice signal. 7. The function detection device according to item 1 of the scope of patent application, wherein the function detection device further comprises a self-test circuit connecting the signal generator and the voice signal detector for directly feeding the voice signal into the The voice signal detector does the detection. TW1225F (BenQ) .ptd Page 15