CN110113469B - Circuit for testing voice breakthrough signal and measuring method thereof - Google Patents
Circuit for testing voice breakthrough signal and measuring method thereof Download PDFInfo
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- CN110113469B CN110113469B CN201910373965.8A CN201910373965A CN110113469B CN 110113469 B CN110113469 B CN 110113469B CN 201910373965 A CN201910373965 A CN 201910373965A CN 110113469 B CN110113469 B CN 110113469B
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- 238000012360 testing method Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title abstract description 32
- 239000003990 capacitor Substances 0.000 claims abstract description 107
- 239000011324 bead Substances 0.000 claims description 13
- 238000000691 measurement method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 12
- 238000007405 data analysis Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 230000005236 sound signal Effects 0.000 description 4
- 230000001629 suppression Effects 0.000 description 4
- 230000005672 electromagnetic field Effects 0.000 description 3
- 230000036039 immunity Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/48—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 specially adapted for particular use
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/48—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 specially adapted for particular use
- G10L25/51—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 specially adapted for particular use for comparison or discrimination
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
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- H04M1/24—Arrangements for testing
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Abstract
The invention provides a circuit for testing voice breakthrough signal and a measuring method thereof, the circuit for testing voice breakthrough signal comprises: a power control unit, a first terminal of the power control unit being electrically coupled to a first node, a second terminal of the power control unit being electrically coupled to a second node, a third terminal of the power control unit being electrically coupled to a third node, and a fourth terminal of the power control unit being electrically coupled to a first resistor unit; one end of the first capacitor unit is electrically coupled to the third node, and the other end of the first capacitor unit is electrically grounded; one end of the second capacitor unit is electrically coupled to the second node, and the other end of the second capacitor unit is electrically grounded; and one end of the third capacitor unit is electrically coupled to the first node, and the other end of the third capacitor unit is electrically grounded.
Description
Technical Field
The present invention relates to the field of voice testing, and more particularly, to a circuit for testing a voice breakthrough signal and a method for testing the same.
Background
At present, for communication products with audio functions, such as mobile phones and the like, sold in the European Union market, corresponding electromagnetic compatibility tests must be carried out; namely, an audio breakthrough test is required for the voice signal to verify whether the performance of the voice signal is affected and whether the call quality is affected under the condition that the voice signal is subjected to external interference, wherein the radiation immunity and the conduction immunity tests are two test items required by the electromagnetic compatibility test.
Electromagnetic Compatibility (EMC) mainly includes two large tests: EMI (Electromagnetic Interference) and EMS (Electro-Magnetic Suceptibility, EMS). While EMI is referred to as electromagnetic field active interference, EMS is referred to as electromagnetic field immunity. One item mainly describing EMS is voice breakthrough (abb), which is mainly applied to communication terminal devices supporting voice calls, such as mobile phones, fixed phones, tablets, and the like. The quality of sound is generally determined by testing the speech break-through level (whether the audio signal interfering with the signal demodulation is out of specification). Two types of tests related to speech breakthrough are: one is a Radiated Reliability (RS) test, the other is a Conducted reliability (CS) test, the former is a test in which the antenna source radiates an electromagnetic field of 3V/m or 10V/m, and the latter is a test in which interference of 3V or 10V is injected into the power connector. If the RS or CS tests fail, the European Union prohibits the product from being sold on its market and no product admission permission is available. While america has no mandatory requirements for RS or CS.
The RS and CS tests require that a tested object builds a test environment according to a normal use mode, which means that an earphone and a charger need to be matched in the test. This test is essentially transparent to the headset and charger supplier requirements and no specific implementation is made. Therefore, the problem of RS and CS is that the terminal manufacturer can think about the method in the product. In the CS test, a 3V interference source is injected through a USB charger, so a terminal manufacturer can directly add a magnetic ring on a USB line for processing in order to pass the test. For RS test, the test terminal device fully leaks a radiation field of 3V/m or 10V/m, the DUT, the earphone and the charger receive interference signals, and the interference signals are demodulated through audio frequency, so that useful voice signals are interfered.
The voice breakthrough term is divided into an uplink and a downlink, the uplink refers to the audio frequency demodulated by the radio frequency signal received by the integrated measuring instrument, and the downlink refers to the voice level received by the earphone. In the testing process, a Microphone (MIC) hole is required to be blocked, and the interference of an external sound source is eliminated. And testing requires that the sound pressure level values of the RS and the CS are lower than-35 dBPa, otherwise, judging that the sound pressure level values are breakthrough.
If RS or CS problems are encountered, the common solution is to change the reserved matching bit of the MIC of the earphone, and the internal schematic diagram of the earphone is mainly divided into: left channel, right channel, MIC and headphone master. Some capacitive matching bits are usually reserved in the MIC path, but the manufacturer usually does not fit the material at this location to save costs. In fact, in the RS or CS debug test, the filter capacitor is not necessarily able to completely solve the problem. As mentioned above, the MIC is blocked during the whole test process, and there is no audio input signal, so that the demodulated signal from the integrated tester is not a useful audio signal but an interference signal. As shown in fig. 1, the left and right channels do not typically incorporate any filter capacitance, primarily to prevent interference from affecting the speech level.
Therefore, the main objective of the present invention is to provide a circuit for testing speech breakthrough signal and a measurement method thereof to further optimize the above mentioned problems.
Disclosure of Invention
In order to solve the above-mentioned technical problem, an object of the present invention is to provide a circuit for testing a speech breakthrough signal, comprising: a power control unit, a first terminal of the power control unit being electrically coupled to a first node, a second terminal of the power control unit being electrically coupled to a second node, a third terminal of the power control unit being electrically coupled to a third node, and a fourth terminal of the power control unit being electrically coupled to a first resistor unit; one end of the first capacitor unit is electrically coupled to the third node, and the other end of the first capacitor unit is electrically grounded; one end of the second capacitor unit is electrically coupled to the second node, and the other end of the second capacitor unit is electrically grounded; and one end of the third capacitor unit is electrically coupled to the first node, and the other end of the third capacitor unit is electrically grounded.
The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme.
In an embodiment of the present invention, the electronic device further includes a second resistor unit, one end of the second resistor unit is electrically coupled to the first resistor unit, and the other end of the second resistor unit is electrically grounded.
In an embodiment of the present invention, the speaker further includes a third resistor unit, one end of the third resistor unit is electrically coupled to the first node, and the other end of the third resistor unit is electrically coupled to a first speaker unit.
In an embodiment of the present invention, the speaker further includes a fourth resistor unit, one end of the fourth resistor unit is electrically coupled to the second node, and the other end of the fourth resistor unit is electrically coupled to a second speaker unit.
In an embodiment of the present invention, the speaker further includes a fifth resistance unit, one end of the fifth resistance unit is electrically coupled to the third node, and the other end of the fifth resistance unit is electrically coupled to a third speaker unit.
In an embodiment of the present invention, the speaker further includes a sixth resistance unit, one end of the sixth resistance unit is electrically coupled to a 1.8 volt power control unit, and the other end of the sixth resistance unit is electrically coupled to the second speaker unit.
In an embodiment of the present invention, the circuit further includes a seventh resistor unit, one end of the seventh resistor unit electrically receives a first differential signal, and the other end of the seventh resistor unit is electrically grounded.
In an embodiment of the present invention, the apparatus further includes a fourth capacitor unit, one end of the fourth capacitor unit electrically receives a second differential signal, and the other end of the fourth capacitor unit is electrically coupled to the second resistor unit.
In an embodiment of the present invention, the speaker further includes a diode unit, one end of the diode unit is electrically coupled to a fourth speaker unit, and the other end of the diode unit is electrically grounded.
The purpose of the patent of the invention and the technical problem solved can be further realized by adopting the following technical measures.
Another objective of the present invention is to provide a measuring method for testing a voice breakthrough signal circuit, which comprises: providing a power control unit, wherein a first end of the power control unit is electrically coupled to a first node, a second end of the power control unit is electrically coupled to a second node, a third end of the power control unit is electrically coupled to a third node, and a fourth end of the power control unit is electrically coupled to a first resistor unit; providing a first capacitor unit, wherein one end of the first capacitor unit is electrically coupled to the third node, and the other end of the first capacitor unit is electrically grounded; providing a second capacitor unit, wherein one end of the second capacitor unit is electrically coupled to the second node, and the other end of the second capacitor unit is electrically grounded; providing a third capacitor unit, wherein one end of the third capacitor unit is electrically coupled to the first node, and the other end of the third capacitor unit is electrically grounded; providing a second resistance unit, wherein one end of the second resistance unit is electrically coupled with the first resistance unit, and the other end of the second resistance unit is electrically grounded; providing a third resistance unit, wherein one end of the third resistance unit is electrically coupled to the first node, and the other end of the third resistance unit is electrically coupled to a first speaker unit; providing a fourth resistance unit, wherein one end of the fourth resistance unit is electrically coupled to the second node, and the other end of the fourth resistance unit is electrically coupled to a second speaker unit; providing a fifth resistance unit, wherein one end of the fifth resistance unit is electrically coupled to the third node, and the other end of the fifth resistance unit is electrically coupled to a third speaker unit; providing a sixth resistor unit, wherein one end of the sixth resistor unit is electrically coupled to a 1.8 volt power control unit, and the other end of the sixth resistor unit is electrically coupled to the second speaker unit; providing a seventh resistor unit, wherein one end of the seventh resistor unit is electrically connected to receive a first differential signal, and the other end of the seventh resistor unit is electrically connected to ground; providing a fourth capacitor unit, wherein one end of the fourth capacitor unit electrically receives a second differential signal, and the other end of the fourth capacitor unit is electrically coupled to the second resistor unit; providing a diode unit, wherein one end of the diode unit is electrically coupled with a fourth loudspeaking unit, and the other end of the diode unit is electrically grounded; and measuring waveform signals of the first differential signal and the second differential signal through the connection of the second resistance unit with the fourth capacitor and the seventh resistance unit.
The invention finally determines 680pf capacitance values in parallel connection between the left and right sound channels and the microphone hole through connecting the power supply control unit with the filter capacitor and continuously testing. And the Audio jack (Audio jack) on the printed circuit board is added with magnetic beads, and the break-through point of the Audio frequency demodulated by receiving the radio frequency signal through the comprehensive tester end is in the range of 40-60Mhz, and the magnetic beads with high impedance of the resonance point in the frequency range can be used, so that the interference suppression effect is better, and the sound pressure value completely meets the requirement.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required in the embodiments are briefly described below. The drawings in the following description are only some embodiments of the present application, and it will be obvious to those skilled in the art that other drawings can be obtained from the drawings without inventive effort.
Fig. 1 is an internal schematic view of an exemplary headset.
FIG. 2 is a circuit diagram of testing a voice breakthrough signal according to an embodiment of the invention.
FIG. 3a is a data analysis diagram of the voice breach signal circuit under test of FIG. 2 when the second resistor is 0 ohm.
FIG. 3b is a data analysis diagram of the test voice breach signal circuit of FIG. 2 when the second resistor is 0 ohm.
FIG. 4a is a data analysis diagram of the test voice breach signal circuit of FIG. 2 when the second resistor is 600 ohms.
FIG. 4b is a data analysis diagram of the test voice breach signal circuit of FIG. 2 when the second resistor is 600 ohms.
FIG. 5 is a flowchart illustrating a method for testing a voice breakthrough signal circuit according to an embodiment of the invention.
Detailed Description
The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced. The directional terms used in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc., refer to the directions of the attached drawings. Accordingly, the directional terms used are used for describing and understanding the present invention, and are not used for limiting the present invention.
In the embodiment of the present invention, in order to help explain the method of the present invention, it will be assumed that the method of the present invention is performed by a test speech break signal circuit. It should be understood, however, that the devices and/or methods may vary and need not work exactly in conjunction with one another as described below, all of which are within the scope of the present embodiments. It is understood that in some embodiments, the processing method of the present invention can be implemented in a circuit for testing speech break-through signals, for example, by operating a driver chip. It should be emphasized that, unless otherwise specified, the methods of the present invention need not be performed in the exact order shown; and similar multiple flows (blocks) may be executed in parallel, rather than in sequence; accordingly, elements of the methods of the present invention are referred to herein as "blocks" rather than "steps". It should also be understood that the method may also be implemented on variants of testing the voice breach signal circuit. It will be further appreciated that the method of the present invention can be implemented in a processing system. However, the method may also be implemented in a similar system having similar components to the system, but arranged in a different configuration.
The drawings and description are to be regarded as illustrative in nature, and not as restrictive. In the drawings, elements having similar structures are denoted by the same reference numerals. In addition, the size and thickness of each component shown in the drawings are arbitrarily illustrated for understanding and ease of description, but the present patent is not limited thereto.
In addition, in the description, unless explicitly described to the contrary, the word "comprise" will be understood to mean that the recited components are included, but not to exclude any other components. Further, in the specification, "on.
To further illustrate the technical means and effects of the present invention for achieving the predetermined purpose, the following detailed description will be given to the circuit for testing voice breakthrough signal and the measuring method thereof according to the present invention, with reference to the accompanying drawings and the specific embodiments, the detailed implementation, structure, features and effects thereof.
Fig. 2 is a diagram of a test voice breakthrough signal circuit according to an embodiment of the invention, fig. 3a is a data analysis diagram of the test voice breakthrough signal circuit according to an embodiment of the invention when the second resistor element in fig. 2 is 0ohm, fig. 3b is a data analysis diagram of the test voice breakthrough signal circuit according to another embodiment of the invention when the second resistor element in fig. 2 is 0ohm, fig. 4a is a data analysis diagram of the test voice breakthrough signal circuit according to an embodiment of the invention when the second resistor element in fig. 2 is 600ohm, and fig. 4b is a data analysis diagram of the test voice breakthrough signal circuit according to another embodiment of the invention when the second resistor element in fig. 2 is 600ohm, please refer to fig. 2, fig. 3a and fig. 3b, for nlink, the demodulated audio signal is output from the audio chip to the audio jack to the headphone, and the entire path is relatively long, the test system monitors the sound pressure level of the earphone hole, so that the effect of connecting a capacitor in parallel at the end close to the earphone is not necessarily obvious, and the effect of connecting the capacitor at the end close to the audio chip can be better. For UPLINK, the comprehensive tester receives the UPLINK radio frequency signal of the mobile phone and demodulates the UPLINK radio frequency signal into an audio signal, and the audio analyzer detects whether the sound pressure level exceeds the standard. It can be seen that the relation between the test result of the UPLINK and the earphone is not good, but the relation between the test result of the UPLINK and the main board of the mobile phone is large, so that the ground of all devices on the whole mobile phone is ensured to be well connected with the main ground, and particularly the main ground of the audio jack is reflowed to the main ground of the printed circuit board. And fig. 2 is a schematic diagram of a printed circuit board side Audio Jack (Audio Jack), related to headphone Audio transmission are four lines (left channel, right channel, MIC and ground), where the headphone ground also serves as part of the path of FM, the second resistive element 320 returns the test ground best if it is 0ohm, but at this time the FM differential lines are grounded together, and FM is not working. Therefore, only magnetic beads can be used in the second resistance unit 320, and the selection of the magnetic beads requires that both interference suppression and minimum system backflow are considered. For example, when GSM900CS tests for voice breakthrough, fig. 3a and 3b are the original uplink and downlink test data, and it can be seen that both exceed the sound pressure level standard.
Referring to fig. 2, in an embodiment of the present invention, a circuit 10 for testing a voice breakthrough signal includes: a power control unit 100, a first terminal 110 (e.g., MIC microphone hole) of the power control unit 100 being electrically coupled to a first node P1(n), a second terminal 120 (e.g., audio left channel) of the power control unit 100 being electrically coupled to a second node P2(n), a third terminal 130 (e.g., audio right channel) of the power control unit 100 being electrically coupled to a third node P3(n), a fourth terminal 140 (e.g., audio ground) of the power control unit 100 being electrically coupled to a first resistor unit 310; a first capacitor unit 210, wherein one end of the first capacitor unit 210 is electrically coupled to the third node P3(n), and the other end of the first capacitor unit 210 is electrically grounded; a second capacitor unit 220, wherein one end of the second capacitor unit 220 is electrically coupled to the second node P2(n), and the other end of the second capacitor unit 220 is electrically grounded; and a third capacitor unit 230, wherein one end of the third capacitor unit 230 is electrically coupled to the first node P1(n), and the other end of the third capacitor unit 230 is electrically grounded.
Referring to fig. 2, in an embodiment of the present invention, the present invention further includes a second resistor unit 320, one end of the second resistor unit 320 is electrically coupled to the first resistor unit 310, and the other end of the second resistor unit 320 is electrically grounded.
Referring to fig. 2, in an embodiment of the present invention, the apparatus further includes a third resistor unit 330, one end of the third resistor unit 330 is electrically coupled to the first node P1(n), and the other end of the third resistor unit 330 is electrically coupled to a first speaker unit 410.
Referring to fig. 2, in an embodiment of the present invention, the speaker further includes a fourth resistance unit 340, one end of the fourth resistance unit 340 is electrically coupled to the second node P2(n), and the other end of the fourth resistance unit 340 is electrically coupled to a second speaker unit 420.
Referring to fig. 2, in an embodiment of the present invention, the present invention further includes a fifth resistor unit 350, one end of the fifth resistor unit 350 is electrically coupled to the third node P3(n), and the other end of the fifth resistor unit 350 is electrically coupled to a third speaker unit 430.
Referring to fig. 2, in an embodiment of the present invention, the speaker system further includes a sixth resistive unit 360, one end of the sixth resistive unit 360 is electrically coupled to a 1.8 v power control unit 105, and the other end of the sixth resistive unit 360 is electrically coupled to the second speaker unit 420.
Referring to fig. 2, in an embodiment of the present invention, the present invention further includes a seventh resistor unit 370, one end of the seventh resistor unit 370 is electrically connected to receive a first differential signal FM1, and the other end of the seventh resistor unit 370 is electrically connected to ground.
Referring to fig. 2, in an embodiment of the present invention, the present invention further includes a fourth capacitor unit 240, one end of the fourth capacitor unit 240 electrically receives a second differential signal FM2, and the other end of the fourth capacitor unit 240 is electrically coupled to the second resistor unit 320.
Referring to fig. 2, in an embodiment of the present invention, the speaker system further includes a diode unit 500, one end of the diode unit 500 is electrically coupled to a fourth speaker unit 440, and the other end of the diode unit 500 is electrically grounded.
Referring to fig. 2, in an embodiment of the present invention, a measurement method for testing a voice breakthrough signal circuit includes: providing a power control unit 100, wherein a first terminal 110 of the power control unit 100 is electrically coupled to a first node P1(n), a second terminal 120 of the power control unit 100 is electrically coupled to a second node P2(n), a third terminal 130 of the power control unit 100 is electrically coupled to a third node P3(n), and a fourth terminal 140 of the power control unit 100 is electrically coupled to a first resistor unit 310; providing a first capacitor unit 210, wherein one end of the first capacitor unit 210 is electrically coupled to the third node P3(n), and the other end of the first capacitor unit 210 is electrically grounded; providing a second capacitor unit 220, wherein one end of the second capacitor unit 220 is electrically coupled to the second node P2(n), and the other end of the second capacitor unit 220 is electrically grounded; providing a third capacitor unit 230, wherein one end of the third capacitor unit 230 is electrically coupled to the first node P1(n), and the other end of the third capacitor unit 230 is electrically grounded; providing a second resistor unit 320, wherein one end of the second resistor unit 320 is electrically coupled to the first resistor unit 310, and the other end of the second resistor unit 320 is electrically grounded; providing a third resistor unit 330, wherein one end of the third resistor unit 330 is electrically coupled to the first node P1(n), and the other end of the third resistor unit 330 is electrically coupled to a first speaker unit 410; providing a fourth resistance unit 340, wherein one end of the fourth resistance unit 340 is electrically coupled to the second node P2(n), and the other end of the fourth resistance unit 340 is electrically coupled to a second speaker unit 420; providing a fifth resistor unit 350, wherein one end of the fifth resistor unit 350 is electrically coupled to the third node P3(n), and the other end of the fifth resistor unit 350 is electrically coupled to a third speaker unit 430; providing a sixth resistor unit 360, wherein one end of the sixth resistor unit 360 is electrically coupled to a 1.8 v power control unit 105, and the other end of the sixth resistor unit 360 is electrically coupled to the second speaker unit 420; providing a seventh resistor unit 370, wherein one end of the seventh resistor unit 370 electrically receives a first differential signal FM1, and the other end of the seventh resistor unit 370 is electrically grounded; providing a fourth capacitor unit 240, wherein one end of the fourth capacitor unit 240 electrically receives a second differential signal FM2, and the other end of the fourth capacitor unit 240 is electrically coupled to the second resistor unit 320; providing a diode unit 500, wherein one end of the diode unit 500 is electrically coupled to a fourth speaker unit 440, and the other end of the diode unit 500 is electrically grounded; and measuring waveform signals of the first differential signal FM1 and the second differential signal FM2 through the connection of the second resistor unit 320 with the fourth capacitor 240 and the seventh resistor unit 370.
Referring to fig. 2, fig. 4a and fig. 4b, the filter capacitor units 210, 220 and 230 are connected in parallel near the power control unit 100, because the breakthrough is at the frequency of 40-60Mhz, we can try to use large pf-class capacitor or low nf-class capacitor, and finally determine 680pf capacitors (such as the first capacitor unit 210, the second capacitor unit 220 and the third capacitor unit 230 of fig. 2) connected in parallel between the left and right channels and mic through continuous trial and error. For the uplink, regardless of the earphone body, we add beads to the audio jack on the printing plate (as the second resistance unit 320 in fig. 2), the break point on the uplink is also in the range of 40-60Mhz, we can use beads with high impedance at the resonance point in this frequency range, so that the interference suppression effect is better, and finally choose beads with 100Mhz 600ohm at the position of the second resistance unit. And after retesting, the sound pressure value completely meets the requirement.
FIG. 5 is a flowchart illustrating a method for testing a voice breakthrough signal circuit according to an embodiment of the invention. Referring to fig. 5, the process S500: providing a power control unit, wherein a first end of the power control unit is electrically coupled to a first node, a second end of the power control unit is electrically coupled to a second node, a third end of the power control unit is electrically coupled to a third node, and a fourth end of the power control unit is electrically coupled to a first resistor unit.
Referring to fig. 5, the process S510: and providing a first capacitor unit, wherein one end of the first capacitor unit is electrically coupled to the third node, and the other end of the first capacitor unit is electrically grounded.
Referring to fig. 5, the process S520: and providing a second capacitor unit, wherein one end of the second capacitor unit is electrically coupled to the second node, and the other end of the second capacitor unit is electrically grounded.
Referring to fig. 5, the process S530: and providing a third capacitor unit, wherein one end of the third capacitor unit is electrically coupled to the first node, and the other end of the third capacitor unit is electrically grounded.
Referring to fig. 5, the process S540: providing a second resistance unit, wherein one end of the second resistance unit is electrically coupled to the first resistance unit, and the other end of the second resistance unit is electrically grounded.
Referring to fig. 5, the process S550: providing a third resistor unit, wherein one end of the third resistor unit is electrically coupled to the first node, and the other end of the third resistor unit is electrically coupled to a first speaker unit.
Referring to fig. 5, the process S560: providing a fourth resistance unit, wherein one end of the fourth resistance unit is electrically coupled to the second node, and the other end of the fourth resistance unit is electrically coupled to a second speaker unit.
Referring to fig. 5, the process S570: providing a fifth resistance unit, wherein one end of the fifth resistance unit is electrically coupled to the third node, and the other end of the fifth resistance unit is electrically coupled to a third speaker unit.
Referring to fig. 5, the process S580: providing a sixth resistor unit, wherein one end of the sixth resistor unit is electrically coupled to a 1.8 volt power control unit, and the other end of the sixth resistor unit is electrically coupled to the second speaker unit.
Referring to fig. 5, the process S590: providing a seventh resistor unit, wherein one end of the seventh resistor unit is electrically connected to receive a first differential signal, and the other end of the seventh resistor unit is electrically connected to ground.
Referring to fig. 5, the process S600: providing a fourth capacitor unit, wherein one end of the fourth capacitor unit electrically receives a second differential signal, and the other end of the fourth capacitor unit is electrically coupled to the second resistor unit.
Referring to fig. 5, the process S610: and providing a diode unit, wherein one end of the diode unit is electrically coupled with a fourth loudspeaking unit, and the other end of the diode unit is electrically grounded.
Referring to fig. 5, the process S620: and measuring waveform signals of the first differential signal and the second differential signal through the connection of the second resistance unit, the fourth capacitor and the seventh resistance unit.
The invention finally determines 680pf capacitance values in parallel connection between the left and right sound channels and the microphone hole through connecting the power supply control unit with the filter capacitor and continuously testing. And the Audio jack (Audio jack) on the printed circuit board is added with magnetic beads, and the break-through point of the Audio frequency demodulated by receiving the radio frequency signal through the comprehensive tester end is in the range of 40-60Mhz, and the magnetic beads with high impedance of the resonance point in the frequency range can be used, so that the interference suppression effect is better, and the sound pressure value completely meets the requirement.
The terms "in some embodiments" and "in various embodiments" are used repeatedly. The terms generally do not refer to the same embodiment; it may also refer to the same embodiment. The terms "comprising," "having," and "including" are synonymous, unless the context dictates otherwise.
Although the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A circuit for testing speech break through signals, comprising:
a power control unit, a first terminal of the power control unit being electrically coupled to a first node, a second terminal of the power control unit being electrically coupled to a second node, a third terminal of the power control unit being electrically coupled to a third node, and a fourth terminal of the power control unit being electrically coupled to a first resistor unit;
one end of the first capacitor unit is electrically coupled to the third node, and the other end of the first capacitor unit is electrically grounded;
one end of the second capacitor unit is electrically coupled to the second node, and the other end of the second capacitor unit is electrically grounded; and
a third capacitor unit, wherein one end of the third capacitor unit is electrically coupled to the first node, the other end of the third capacitor unit is electrically grounded, and the capacitance values of the first capacitor unit, the second capacitor unit and the third capacitor unit are 680 pf;
one end of the second resistance unit is electrically coupled with the first resistance unit, the other end of the second resistance unit is electrically grounded, the second resistance unit is connected with a magnetic bead in parallel, and the resonance point of the magnetic bead is between 40 and 60 Mhz.
2. The circuit of claim 1, further comprising a third resistor unit, wherein one end of the third resistor unit is electrically coupled to the first node, and the other end of the third resistor unit is electrically coupled to a first speaker unit.
3. The circuit of claim 1, further comprising a fourth resistor unit, one end of the fourth resistor unit being electrically coupled to the second node, and the other end of the fourth resistor unit being electrically coupled to a second speaker unit.
4. The circuit of claim 1, further comprising a fifth resistor unit, wherein one end of the fifth resistor unit is electrically coupled to the third node, and the other end of the fifth resistor unit is electrically coupled to a third speaker unit.
5. The circuit of claim 3, further comprising a sixth resistor unit, wherein one end of the sixth resistor unit is electrically coupled to a 1.8V power control unit, and the other end of the sixth resistor unit is electrically coupled to the second speaker unit.
6. The circuit of claim 1, further comprising a seventh resistor unit, wherein one end of the seventh resistor unit is electrically connected to receive a first differential signal, and the other end of the seventh resistor unit is electrically connected to ground.
7. The circuit of claim 1, further comprising a fourth capacitor unit, wherein one end of the fourth capacitor unit is electrically coupled to receive a second differential signal, and the other end of the fourth capacitor unit is electrically coupled to the second resistor unit.
8. The circuit of claim 1, further comprising a diode unit, wherein one end of the diode unit is electrically coupled to a fourth speaker unit, and the other end of the diode unit is electrically grounded.
9. A measurement method for testing a voice breakthrough signal circuit includes:
providing a power control unit, wherein a first end of the power control unit is electrically coupled to a first node, a second end of the power control unit is electrically coupled to a second node, a third end of the power control unit is electrically coupled to a third node, and a fourth end of the power control unit is electrically coupled to a first resistor unit;
providing a first capacitor unit, wherein one end of the first capacitor unit is electrically coupled to the third node, and the other end of the first capacitor unit is electrically grounded;
providing a second capacitor unit, wherein one end of the second capacitor unit is electrically coupled to the second node, and the other end of the second capacitor unit is electrically grounded;
providing a third capacitor unit, wherein one end of the third capacitor unit is electrically coupled to the first node, the other end of the third capacitor unit is electrically grounded, and the capacitance values of the first capacitor unit, the second capacitor unit and the third capacitor unit are 680 pf;
providing a second resistance unit, wherein one end of the second resistance unit is electrically coupled to the first resistance unit, the other end of the second resistance unit is electrically grounded, the second resistance unit is connected in parallel with a magnetic bead, and the resonance point of the magnetic bead is between 40 and 60 Mhz;
providing a third resistance unit, wherein one end of the third resistance unit is electrically coupled to the first node, and the other end of the third resistance unit is electrically coupled to a first speaker unit;
providing a fourth resistance unit, wherein one end of the fourth resistance unit is electrically coupled to the second node, and the other end of the fourth resistance unit is electrically coupled to a second speaker unit;
providing a fifth resistance unit, wherein one end of the fifth resistance unit is electrically coupled to the third node, and the other end of the fifth resistance unit is electrically coupled to a third speaker unit;
providing a sixth resistor unit, wherein one end of the sixth resistor unit is electrically coupled to a 1.8 volt power control unit, and the other end of the sixth resistor unit is electrically coupled to the second speaker unit;
providing a seventh resistor unit, wherein one end of the seventh resistor unit is electrically connected to receive a first differential signal, and the other end of the seventh resistor unit is electrically connected to ground;
providing a fourth capacitor unit, wherein one end of the fourth capacitor unit electrically receives a second differential signal, and the other end of the fourth capacitor unit is electrically coupled to the second resistor unit;
providing a diode unit, wherein one end of the diode unit is electrically coupled with a fourth loudspeaking unit, and the other end of the diode unit is electrically grounded; and
and measuring waveform signals of the first differential signal and the second differential signal through the connection of the second resistance unit, the fourth capacitor and the seventh resistance unit.
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| CN201910373965.8A CN110113469B (en) | 2019-05-07 | 2019-05-07 | Circuit for testing voice breakthrough signal and measuring method thereof |
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| CN201910373965.8A CN110113469B (en) | 2019-05-07 | 2019-05-07 | Circuit for testing voice breakthrough signal and measuring method thereof |
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| CN2875008Y (en) * | 2005-05-12 | 2007-02-28 | 上海环达计算机科技有限公司 | Electromagnetic interference preventing circuit of audio interface |
| CN101488999A (en) * | 2008-01-15 | 2009-07-22 | 诚实科技股份有限公司 | Test port processing method capable of lowering noise interference |
| CN102136273A (en) * | 2010-01-21 | 2011-07-27 | 比亚迪股份有限公司 | Audio processing device and method of electronic equipment |
| CN104469615A (en) * | 2014-12-15 | 2015-03-25 | 上海华勤通讯技术有限公司 | Terminal device and earphone circuit thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203151737U (en) * | 2013-01-16 | 2013-08-21 | 东莞市伟旺达电子有限公司 | Earphone test expanding circuit |
| TWI539829B (en) * | 2013-04-01 | 2016-06-21 | 宏碁股份有限公司 | Detecting circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2875008Y (en) * | 2005-05-12 | 2007-02-28 | 上海环达计算机科技有限公司 | Electromagnetic interference preventing circuit of audio interface |
| CN101488999A (en) * | 2008-01-15 | 2009-07-22 | 诚实科技股份有限公司 | Test port processing method capable of lowering noise interference |
| CN102136273A (en) * | 2010-01-21 | 2011-07-27 | 比亚迪股份有限公司 | Audio processing device and method of electronic equipment |
| CN104469615A (en) * | 2014-12-15 | 2015-03-25 | 上海华勤通讯技术有限公司 | Terminal device and earphone circuit thereof |
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| CN110113469A (en) | 2019-08-09 |
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