CN102710821B - Hand microphone for interphone and interphone - Google Patents
Hand microphone for interphone and interphone Download PDFInfo
- Publication number
- CN102710821B CN102710821B CN201210149065.3A CN201210149065A CN102710821B CN 102710821 B CN102710821 B CN 102710821B CN 201210149065 A CN201210149065 A CN 201210149065A CN 102710821 B CN102710821 B CN 102710821B
- Authority
- CN
- China
- Prior art keywords
- hand miaow
- interface
- hand
- pins
- miaow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Telephone Function (AREA)
Abstract
The invention discloses a hand microphone for an interphone and the interphone. The hand microphone comprises a hand microphone body, a hand microphone connector and a signal wire, wherein the hand microphone connector is connected with the interphone, the signal wire is connected between the hand microphone connector and the interphone, a loudspeaker and a microphone are arranged on the hand microphone body, a loudspeaker pin, a power supply/inserting detection/microphone signal multiplexing pin and a power supply/inserting detection/microphone signal grounding pin are arranged in the hand microphone connector, the loudspeaker pin is connected to a loudspeaker of the hand microphone, a positive pole of the hand microphone is connected with the multiplexing pin, a negative pole of the hand microphone is connected with a grounding wire of the hand microphone, the grounding wire is connected with the grounding pin in the hand microphone connector, the detection of a connection state of the hand microphone is not affected by voltage fluctuation on the signal wire of the microphone, erroneous determination is avoided, one circuit board can meet designing requirements of quantity connectors of two types of pins simultaneously and the compatibility is high.
Description
Technical field
The invention belongs to mobile communication technology field, specifically, relate to a kind of there is intercommunication function mobile phone and be applicable to and described intercom cellphone with the use of hand miaow.
Background technology
Along with popularizing of 3G business, the application that mobile phone realizes intercommunication function by 3G network gets more and more.Conveniently the intercommunication operation of user, can be widely used with the hand miaow of mobile phone external.Hand miaow, be again shoulder miaow, compact, can be worn at left shoulder or the right scapuloanterior face of user during use.Hand miaow is connected on mobile phone by holding wire, such user when conversing, without the need to grip mobile phone just can carry out one to one or one-to-many intercommunication call.
Current hand miaow is primarily of a loud speaker, a microphone, a button and a small amount of circuit composition.Wherein, loud speaker can play the voice signal that the other side transmits, and microphone can pick up the voice of user, then sends the other side to by mobile phone.For current mobile phone products, due in the call hardware interface circuit that provides at mobile phone, the unripe circuit being exclusively used in intercommunication function, therefore needs the circuit realiration intercommunication function by hand miaow itself and ensures voice call performance.In existing mobile phone circuit design, usually mobile phone is needed to provide enough communication interface to realize the function such as insertion detection, talk button detection of hand miaow, this just needs to take the too much I/O interface resource of process chip on cell phone mainboard, causes the difficulty in cell phone mainboard circuit design thus.In order to save the communication interface of mobile phone, the insertion detection of hand miaow, button detect and share a holding wire with the transmission of microphone signal by some design.But, this design is after having the sound of large volume to be arrived by microphones, significantly signal intensity can be produced on this holding wire, this significantly signal mobile phone can be caused to judge by accident, think it is that key contact or hand miaow are extracted by mistake, and then the response of execution error, affect the normal use of user.
Summary of the invention
The object of the present invention is to provide a kind of hand miaow for intercom cellphone, on the basis that the interface as far as possible reducing intercom cellphone takies, the reliability improving speech quality and use.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
For a hand miaow for intercom cellphone, comprise hand miaow main body, for the hand miaow interface that connects intercom cellphone and the holding wire be connected between described hand miaow main body and hand miaow interface, described hand miaow main body be provided with loud speaker and microphone; In described hand miaow interface, definition has multiplexing pins and the grounding pin of speakers pins, power supply/insertion detection/microphone signal; Wherein, described speakers pins connects the loud speaker of hand miaow, the multiplexing pins described in positive pole connection of microphone in hand miaow, and the negative pole of microphone connects the ground wire of hand miaow, and described ground wire connects the grounding pin in hand miaow interface; The first resistance is parallel with between the positive pole and negative pole of described microphone.
In order to eliminate high frequency noise interference, between the positive pole and negative pole of described microphone, be also parallel with coupling capacitance.
Preferably, described speakers pins comprises two, when described loud speaker receives difference audio signal, connects corresponding with the difference audio terminal of loud speaker respectively for the speakers pins described in two, transmission difference audio signal; When described loud speaker receives single-ended audio signal, connect corresponding with the left and right sound channels audio terminal of loud speaker respectively for the speakers pins described in two, transmission left and right sound channels audio signal.
Further, described hand miaow main body is also provided with a talk button, one end of described talk button connects the multiplexing pins in described hand miaow interface by the second resistance of series connection, the other end connects the ground wire of hand miaow.
Adopting above-mentioned hand miaow circuit design, in hand miaow interface, 4 pins can be only set, the four-section type headset interface of general 2.5mm or 3.5mm therefore can being used as described hand miaow interface, for being connected with the main body of intercom cellphone.Certainly, 10 pin MINI USB interface or 9 pin USB3.0 interfaces also can be adopted as described hand miaow interface, connect the main body of intercom cellphone, utilize four pins in USB interface to transmit the signal with the communication of hand miaow.
Based on above-mentioned hand miaow circuit structure, invention further provides a kind of intercom cellphone adopting described hand miaow to design, comprise mobile phone body, described mobile phone body is provided with the communication interface for being connected with hand miaow; As the hand miaow suitable with described intercom cellphone, its structure comprises hand miaow main body, for the hand miaow interface that connects intercom cellphone and the holding wire be connected between described hand miaow main body and hand miaow interface, described hand miaow main body is provided with loud speaker and microphone; In described hand miaow interface, definition has multiplexing pins and the grounding pin of speakers pins, power supply/insertion detection/microphone signal; Wherein, described speakers pins connects the loud speaker of hand miaow, the multiplexing pins described in positive pole connection of microphone in hand miaow, and the negative pole of microphone connects the ground wire of hand miaow, and described ground wire connects the grounding pin in hand miaow interface; The first resistance is parallel with between the positive pole and negative pole of described microphone; For described mobile phone body, in its communication interface, definition has and multiple pins that position corresponding identical with the definition mode of each pin in described hand miaow interface; Inner in mobile phone body, speakers pins in communication interface connects the output of audio amplifier circuit, the ADC interface of the multiplexing pins one side connection handling chip in communication interface, and connect DC power supply by the 5th resistance, on the other hand by the microphone signal input interface of capacitance connection handling chip, the grounding pin in communication interface connects mobile phone body systematically.
Preferably, described communication interface and hand miaow interface preferably adopt 10 pin MINI USB interface of a pair coupling grafting or 9 pin USB3.0 interfaces to design, get final product external multiple external equipment to realize only arranging a communication interface on intercom cellphone, complete the purpose of design of several functions.Specifically, except define 4 pins for communicating with described hand miaow in described communication interface except (i.e. speakers pins, multiplexing pins and grounding pin), an antenna leads can also be all defined in described communication interface and hand miaow interface, described antenna leads connects the frequency-modulated antenna in mobile phone body in intercom cellphone side, connects the ground wire in hand miaow main body in hand miaow side; Can also define further in described communication interface and have USB differential data transmission pin and charging pins; Described USB differential data transmission pin connects the process chip in mobile phone body, communicates for being connected with the USB device of outside; Charging pins connects the battery in mobile phone body, when external charger, for charging to the battery in mobile phone body.
For the hand miaow interface of above-mentioned 4 pinned, the ADC interface of mobile phone body inter-process chip can be utilized according to the difference of the voltage magnitude received, the compatibility realized whether talk button is pressed detects.Certainly, the pressing detection for talk button also can adopt an independent road GPIO mouth of mobile phone body inter-process chip to sample.When adopting rear a kind of design, needing in the hand miaow interface of hand miaow, set up a button and detecting pin; For the talk button on hand miaow, then one end of described talk button can be connected the ground wire of miaow in one's hands, the other end passes through the 3rd resistance of series connection or is directly connected on described button detection pin.By detecting the change in voltage on described button detection pin, realize the accurate detection whether voice button is pressed.
Based on rear a kind of hand miaow circuit design, present invention also offers a kind of with this hand miaow with the use of intercom cellphone, comprise mobile phone body, described mobile phone body be provided with the communication interface for being connected with hand miaow; As the hand miaow suitable with described intercom cellphone, its structure comprises hand miaow main body, for the hand miaow interface that connects intercom cellphone and the holding wire be connected between described hand miaow main body and hand miaow interface, described hand miaow main body is provided with microphone, loud speaker and talk button; Comprise speakers pins at described hand miaow interface, the multiplexing pins of power supply/insertion detection/microphone signal, button detect pin and grounding pin; Described speakers pins connects the loud speaker of hand miaow, the multiplexing pins described in positive pole connection of microphone in hand miaow, the grounding pin described in negative pole connection of microphone; The first resistance is parallel with between the positive pole and negative pole of described microphone; One end of described talk button connects the ground wire of hand miaow, and the other end passes through the 3rd resistance of series connection or is directly connected on described button detection pin; For mobile phone body part, in described communication interface, definition has and multiple pins that position corresponding identical with the definition mode of each pin in described hand miaow interface; Inner in mobile phone body, the speakers pins in communication interface connects the output of audio amplifier circuit; The ADC interface of the multiplexing pins one side connection handling chip in communication interface, and connect DC power supply by the 5th resistance, on the other hand by the microphone signal input interface of capacitance connection handling chip; Button in communication interface detects a road GPIO mouth of pin one side connection handling chip, connects DC power supply on the other hand by the 4th resistance; Grounding pin in communication interface connects mobile phone body systematically.
Preferably, described communication interface and hand miaow interface preferably adopt 10 pin MINI USB interface of a pair coupling grafting or 9 pin USB3.0 interfaces to design, get final product external multiple external equipment to realize only arranging a communication interface on intercom cellphone, complete the purpose of design of several functions.Specifically, except define 5 pins for communicating with described hand miaow in described communication interface except (namely speakers pins, multiplexing pins, button detect pin and grounding pin), an antenna leads can also be all defined in described communication interface and hand miaow interface, described antenna leads connects the frequency-modulated antenna in mobile phone body in intercom cellphone side, connects the ground wire of hand miaow in hand miaow side; Can also define further in described communication interface and have USB differential data transmission pin and charging pins; Described USB differential data transmission pin connects the process chip in mobile phone body, communicates for being connected with the USB device of outside; Charging pins connects the battery in mobile phone body, when external charger, for charging to the battery in mobile phone body.
Compared with prior art, advantage of the present invention and good effect are: the present invention is by arranging telecommunication circuit at hand miaow and intercom cellphone inside, when hand miaow is inserted in mobile phone body, detection for hand miaow insert state can not be subject to the impact of voltage fluctuation on microphone signal line, thus improve the reliability that hand miaow inserts detection, effectively prevent the generation of erroneous judgement.In addition, selection for second, third resistance in hand miaow circuit is introduced, the designing requirement that one piece of wiring board and a set of components and parts meet two kinds of pin number interfaces simultaneously can be realized, for the intercom cellphone being configured with different hand miaow interface, the data wire only need changing hand miaow can meet and the grafting of different intercom cellphone, communicating requirement, has higher compatibility.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of hand miaow;
Fig. 2 is the circuit theory diagrams of a kind of embodiment of the inner motherboard circuit of hand miaow proposed by the invention and intercom cellphone;
Fig. 3 is the circuit theory diagrams of another embodiment of the inner motherboard circuit of hand miaow proposed by the invention and intercom cellphone;
Fig. 4 is the voltage oscillogram of the ADC interface of process chip on intercom cellphone mainboard;
Fig. 5 is employing 10 pin MINI USB interface as each pinout figure during communication interface on intercom cellphone.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Embodiment one, the present embodiment is in order on the basis practicing every conceivable frugality intercom cellphone I/O interface resource, realize the reliable Detection that hand miaow inserts and talk button contacts, the internal circuit of opponent's miaow and the telephony interface circuit of intercom cellphone inside have carried out brand-new design, shown in Fig. 2 or Fig. 3.
The hand miaow of the present embodiment comprises hand miaow main body 11-1, for the hand miaow interface 11-3 of grafting intercom cellphone and the holding wire 11-2 that is connected between described hand miaow main body 11-1 and hand miaow interface 11-3, shown in Figure 1.Hand miaow main body 11-1 is laid with microphone MIC, loud speaker SP and talk button PTT.In the circuit design of hand miaow, for the hand miaow interface 11-3 for grafting intercom cellphone on hand miaow, according to the difference of pin signal transmission each in interface, definition have speakers pins 1,2, the multiplexing pins 3 of power supply/insertion detection/microphone signal and grounding pin 4, shown in Figure 2.Receive the loud speaker SP of difference audio signal for needing or need to receive the loud speaker SP of left and right sound channels audio signal, needing to define two speakers pins 1,2 in described hand miaow interface 11-3.When the loud speaker SP that selects in hand miaow requires the monophonic audio signal receiving difference form, can connect by a pair differential signal line is corresponding with the difference audio terminal of loud speaker SP respectively, to receive and to play the call voice of the other side.When the loud speaker SP that selects in hand miaow requires the left and right sound channels audio signal receiving single-ended format, can connect by two audio signal wires are corresponding with the left and right sound channels audio terminal of loud speaker SP respectively, realize reception and the broadcasting of the other side's call voice.
Certainly, for the loud speaker SP only supporting single-ended monophonic audio signal, then can only define a speakers pins in hand miaow interface 11-3, adopt a holding wire to be connected to the audio terminal of loud speaker SP, the call voice from the other side received by intercom cellphone is play by the loud speaker SP on hand miaow and is exported.
Only difference audio transmission mode is adopted to be specifically described for the loud speaker SP configured on hand miaow below the present embodiment.
As shown in Figure 2, connect in the multiplexing pins 3 of miaow interface in one's hands by the positive pole of microphone MIC in hand miaow, this multiplexing pins 3 one aspect is as power pins, and the DC power supply provided by intercom cellphone is introduced in miaow in one's hands, for the microphone MIC in hand miaow powers; On the other hand as the detection pin of hand miaow plug, peripheral circuit is coordinated to realize the accurate detection of intercom cellphone opponent miaow insert state; The third aspect is as the transmission pin of audio signal, and the local user transmitting voice signal picked up by microphone MIC on hand miaow to intercom cellphone, and then sends to the other user by intercom cellphone; In addition, the detection pin of talk button PTT can also be also used as in the present embodiment further, complete the effective detection whether talk button PTT being in pressed state.The negative pole of microphone MIC is connected the ground wire of hand miaow, and described ground wire is connected on the grounding pin 4 in miaow interface in one's hands, to form the current supply circuit of microphone MIC.At the positive pole of microphone MIC first resistance R1 in parallel with between negative pole, the current signal for the change exported by microphone MIC is converted to voltage signal, exports intercom cellphone to by the multiplexing pins 3 of hand miaow interface.All right parallel coupled capacitor C1, C2 further between the both positive and negative polarity of described microphone MIC, for the interference of elimination high-frequency noise, the time division duplex noise etc. that such as GSM network is intrinsic.For the talk button PTT that hand miaow is arranged, its one end is connected in the multiplexing pins 3 of described hand miaow interface by the second resistance R2 of series connection, the other end connects the ground wire of hand miaow, coordinates the telephony interface circuit realiration designed in intercom cellphone to the detection of talk button PTT pressed state.
Adopt the hand miaow circuit structure design shown in Fig. 2, request signal transmission between hand miaow and intercom cellphone can be met owing to only needing use 4 holding wires, therefore, the four-section type headset interface of 2.5mm or 3.5mm general at present can be selected as described hand miaow interface 11-3, realize the connection communication of hand miaow and intercom cellphone.
Based on the hand miaow circuit designed by above-mentioned 4 pinned hand miaow interfaces, the mainboard of intercom cellphone can design telephony interface circuit as shown in Figure 2, namely be arranged on the housing of mobile phone body according to the structure choice of hand miaow interface and the interface of its adaptation as the communication interface of intercom cellphone in the main body of intercom cellphone, plug for hand miaow interface.In communication interface, identical signal pins is set according to the pin number of hand miaow interface and installation position, and give identical interface definition, namely comprise speakers pins 1, below 2(equally and be still described for two pins transmitted needed for difference audio signal or left and right acoustic channels audio signal), the multiplexing pins 3 of power supply/insertion detection/microphone signal and grounding pin 4.Wherein, speakers pins 1,2 connects the audio amplifier circuit on the mainboard of mobile phone body inside, after the other side's voice signal received by intercom cellphone carries out amplification process, the monophonic audio signal of output difference form-separating or the left and right acoustic channels audio signal of single-ended format export the loud speaker SP in hand miaow to by speakers pins 1,2, play the other side's voice to drive loud speaker SP.Multiplexing pins 3 one aspect in communication interface is connected to ADC interface (the i.e. analog-to-digital conversion interface of the process chip on cell phone mainboard, for analog signal is converted to digital signal, be supplied to process chip to complete the detection of opponent's miaow different conditions), and pass through the microphone signal input interface of capacitance C3 connection handling chip; DC power supply VCC is connected on the other hand by the 5th resistance R5.Grounding pin 4 in communication interface connects intercom cellphone mainboard systematically, is plugged into after on intercom cellphone at hand miaow, realize mobile phone circuit and hand miaow circuit commonly.
The operation principle of intercom cellphone shown in Fig. 2 and hand miaow circuit is: when in the main body that hand miaow is not inserted into intercom cellphone, the voltage magnitude that the voltage perseverance detected by the ADC interface of process chip in mobile phone is DC power supply VCC.When the hand miaow interface of hand miaow is plugged into after on intercom cellphone, due to the internal resistance of microphone MIC in hand miaow and the dividing potential drop effect of the first resistance R1, the voltage of ADC interface is made to be less than VCC.Therefore, the process chip in mobile phone can judge by the magnitude of voltage constantly detecting its ADC interface whether hand miaow inserts.
Be inserted into after on intercom cellphone at hand miaow, when intercom cellphone receives the voice signal of the other side, the audio amplifier circuit of interior of mobile phone is then utilized to carry out amplification process to the voice signal received, then the loud speaker SP of hand miaow is exported to, by loud speaker SP, the signal of telecommunication is reduced into voice signal, plays the other side's voice to local user.
When local user needs to send call voice to the other side, utilize the voice that the pickup of the microphone MIC on hand miaow local user sends, and voice signal is converted into the current signal output of change by microphone MIC.Owing to being parallel with the first resistance R1 at the two ends of microphone MIC, the current signal of the change that therefore microphone MIC can be exported under the effect of resistance R1 converts the voltage signal of change to, transfers to intercom cellphone by multiplexing pins 3.This voltage signal changed extracts AC signal wherein through capacitance C3, i.e. voice signal, transfer in the microphone signal input interface of handset processes chip, through the process of process chip, the voice signal of local user is sent to the intercom cellphone of the other side.
Because the electric current exported by microphone MIC can be changed along with the change of voice signal power, when the sound that microphone MIC receives is larger when loudspeaker sound is excessive (such as local user speak aloud or), the holding wire connecting microphone MIC positive pole can produce larger voltage fluctuation, can close to the amplitude of DC power supply VCC under extreme case, thus hand miaow is extracted to cause process chip in mobile phone to be thought by mistake, thus there is erroneous judgement problem.But if in the two ends parallel connection of microphone MIC after the first resistance R1, on the holding wire connecting microphone MIC positive pole, the maximum of its voltage is just the partial pressure value on resistance R1.Like this, even if there is the most extreme situation, namely microphone MIC is in high-impedance state, and the magnitude of voltage on this holding wire also can not reach VCC, thus effectively can ensure that ADC interface detects hand miaow and inserts event not by the impact of microphone MIC signal, the reliability of circuit is greatly improved.
In order to after local user press-to-talk button PTT, then the voice signal sent by local user is sent to the other side's mobile phone, needs the accurate detection realized in intercom cellphone side talk button PTT pressed state.Thus, the present embodiment designs the second resistance R2 between talk button PTT and the ADC interface of handset processes chip.When local user presses the talk button PTT on assistant's miaow, although the voltage on the holding wire connecting microphone MIC positive pole changes with voice power always, can be tested by a large amount of, draw maximum and the minimum value of its operating voltage.Just the resistance of the second resistance R2 can be set thus according to the minimum value inserting hand miaow, make when talk button PTT presses, voltage on ADC interface is less than above-mentioned minimum value, and then process chip just can according to the magnitude of voltage size that its ADC interface inputs, whether the insert state of opponent's miaow and talk button PTT press and judge exactly.
For the resistance of the first resistance R1 be 10K Ω, the resistance of the second resistance R2 is 1.5K Ω, the resistance of the 5th resistance R5 is described for 2.2K Ω, can draw voltage waveform as shown in Figure 4.In Fig. 4, abscissa is time shaft, ordinate is magnitude of voltage on ADC interface.If the magnitude of voltage of the DC power supply VCC used is 2.2V, when then not inserting hand miaow, the magnitude of voltage of ADC interface is 2.2V, and because there is the dividing potential drop effect of the first resistance R1 after inserting hand miaow, the voltage on ADC interface is made to be 1.8V, and after microphone MIC is gone up in parallel connection again, due to the equiva lent impedance of microphone MIC itself, make the magnitude of voltage on ADC interface can not more than 1.8V.By a large amount of test, measure people when microphone MIC talks, the minimum that can produce is 0.8V, so by calculate and the resistance setting the second resistance R2 is 1.5K Ω, then can obtain: as press-to-talk button PTT, under the dividing potential drop effect of the parallel branch of the first resistance R1 and the second resistance R2 composition, the voltage on ADC interface is made to be about 0.62V.In like manner, due to the existence of self internal resistance of microphone MIC, when talk button PTT presses, the voltage on ADC interface also can not more than 0.62V.
By above Measurement and Computation, the several numerical value drawn can be used as the judgement thresholding that process chip inserts event and key-press event.Such as, get 2.0V and insert the threshold value detected as hand miaow, get 0.7V presses event threshold value as talk button PTT.That is: when ADC interface testing to voltage higher than 2.0V time, think that hand miaow does not insert; When the voltage that ADC interface testing arrives higher than 0.7V lower than 2.0V time, then think hand miaow insert but talk button PTT do not press; And when the voltage that ADC interface testing arrives is lower than 0.7V, then think that hand miaow inserts and presses talk button PTT.
Meanwhile, because voice signal has the size factors of instability, under not getting rid of the few cases, appear in the phenomenon of voltage when talk button PTT does not press on ADC interface lower than 0.7V.In order to address this problem, can be judged on software, namely when the voltage on continuous 3 ADC interfaces being detected lower than 0.7V, just think that talk button PTT is pressed, and 1 time or continuous when there is voltage lower than 0.7V 2 times, do not think that talk button PTT is pressed, improve the accuracy that button detects thus.
For the detection of talk button PTT pressed state, circuit design as shown in Figure 3 can also be adopted.Namely in the hand miaow interface of hand miaow, set up a button detect pin 5,3rd resistance R3 is set in the internal circuit of hand miaow, one end of talk button PTT is connected the ground wire of hand miaow, and being connected on the grounding pin 4 of miaow interface in one's hands by ground wire, the button that the other end connects hand miaow interface by the 3rd described resistance R3 detects pin 5.Certainly, also directly described button can be detected pin 5 ground connection.
Coordinate the hand miaow circuit designed by this 5 pinned hand miaow interfaces, need on the one hand in intercom cellphone side to adopt the communication interface with 5 pins realize with hand miaow mate grafting; Need on the other hand to use an extra road GPIO mouth of process chip to complete Detection task to talk button PTT pressed state.That is, select the button of a road GPIO mouth connecting communication interface of process chip in intercom cellphone to detect pin 5, and connect DC power supply VCC by the 4th resistance R4.
When the talk button PTT on hand miaow does not press, PTT is in open-circuit condition.Owing to there being the existence of pull-up resistor R4, the voltage on GPIO mouth is in high level always.And when talk button PTT presses, PTT is in short-circuit condition, namely GPIO mouth is by the 3rd resistance R3 ground connection or direct ground connection.When by the 3rd resistance R3 ground connection, as long as the resistance of configuration the 3rd resistance R3 is much smaller than the resistance of the 4th resistance R4, the level on GPIO mouth namely can be made to be low level by high level saltus step.According to directly grounded mode, then when talk button PTT presses, the level on GPIO mouth can be just zero level by high level VCC saltus step.When the process chip in mobile phone detects that the level of its GPIO mouth becomes low level state from high level, can judge that talk button PTT presses, represent that local user is wanted to be in the state of propagandaing directed to communicate.The microphone signal input interface now opening process chip receives microphone MIC on hand miaow and gathers the voice signal exported, and is sent to the other side's mobile phone.
Select employing second resistance R2 or the 3rd resistance R3(or direct grounding way) realize the detection of talk button PTT pressed state, its difference is:
1, system hardware resources difference is taken.Use the scheme of resistance R2, hand miaow circuit has needs 4 holding wires altogether, is particularly suitable for the equipment that peripheral interface holding wire is few, can use general 2.5mm 3.5mm four-section type headset; And using the scheme of resistance R3, then the holding wire taken is 5.
2, the state of talk button PTT is different on the impact of microphone signal.Use the scheme of resistance R2, by the explanation of Fig. 4, than when not pressing talk button PTT during press-to-talk button PTT, the voltage on microphone signal transmission line is low.Therefore, identical voice signal, electrical signal amplitude during press-to-talk button PTT, hand miaow produced is less than signal amplitude when not pushing button PTT.And use the scheme of resistance R3, then there is not this problem.
Two kinds of designs are in design and production process, only need select the resistance welded of suitable resistance on R2 position or be welded on R3 position, just can adapt to the mobile phone circuit of different hand miaow interface, namely realize the Design of Compatibility requirement that 4 lines and 5 line schemes share a hand miaow wiring board.
Certainly, for the object integrating communication interface quantity on intercom cellphone, can arrange one on intercom cellphone can the communication interface of compatible grafting polytype ancillary equipment, such as adopt 10 pin MIN USB interface or 9 pin USB3.0 interfaces as described communication interface, be used for be connected with ancillary equipment such as hand miaow, USB device and chargers and communicate.To adopt 10 pin MIN USB interface J1 to be described as described communication interface, shown in Figure 5.In 10 pins of described USB interface J1, select that 1,5,7,9,10 pins wherein detect pin PTT respectively as the button with the communication of hand miaow, speakers pins SP+, SP-, power supply/insertion detect/the multiplexing pins MUX of microphone signal and grounding pin GND, when mobile phone grafting hand miaow, for realizing the Signal transmissions between mobile phone and hand miaow.Defining 2 pin is charging pins DC_IN, at intercom cellphone interrelated batteries BTT, for when mobile phone and charger plug, is the battery charging in mobile phone by charger.Defining 4 pin, 6 pin are USB differential data transmission pin USB_D+, USB_D-, connecting the process chip of interior of mobile phone, for carrying out transfer of data with the USB device of periphery.Defining 8 pin is antenna leads, connects the frequency-modulated antenna in mobile phone body.Described frequency-modulated antenna can independently in mobile phone body be laid, and the systematically line in mobile phone body also can be adopted to be formed.In hand miaow, 8 pin of same definition hand miaow interface are antenna leads, connect the ground wire in hand miaow.When hand miaow inserts, frequency-modulated antenna part in mobile phone is communicated with the ground wire in hand miaow, the frequency-modulated antenna that common formation is complete, when mobile phone body opens broadcast function, receive the FM FM signal in broadcasting station, and play output by the loud speaker SP on hand miaow.
Certainly; the above is only a kind of preferred implementation of the present invention; it should be noted that; for those skilled in the art; under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (12)
1., for a hand miaow for intercom cellphone, comprise hand miaow main body, for the hand miaow interface that connects intercom cellphone and the holding wire be connected between described hand miaow main body and hand miaow interface, described hand miaow main body be provided with loud speaker and microphone; It is characterized in that: in described hand miaow interface, definition has multiplexing pins and the grounding pin of speakers pins, power supply/insertion detection/microphone signal; Wherein, described speakers pins connects the loud speaker of hand miaow, the multiplexing pins described in positive pole connection of microphone in hand miaow, and the negative pole of microphone connects the ground wire of hand miaow, and described ground wire connects the grounding pin in hand miaow interface; The first resistance is parallel with between the positive pole and negative pole of described microphone; Described hand miaow main body is also provided with a talk button, and one end of described talk button connects the described multiplexing pins in hand miaow interface by the second resistance of series connection, the other end connects the ground wire of hand miaow;
Wherein, described speakers pins is provided with one or two; When single-ended monophonic audio signal supported by described loud speaker, in hand miaow interface, define a speakers pins, adopt a holding wire to be connected to the audio terminal of loud speaker; When described loud speaker receives difference audio signal or receives left and right sound channels audio signal, two speakers pins are defined in described hand miaow interface, when the loudspeaker requirements selected in hand miaow receives the monophonic audio signal of difference form, connect by a pair differential signal line is corresponding with the difference audio terminal of loud speaker respectively; When the loudspeaker requirements selected in hand miaow receives the left and right sound channels audio signal of single-ended format, connect by two audio signal wires are corresponding with the left and right sound channels audio terminal of loud speaker respectively.
2. the hand miaow for intercom cellphone according to claim 1, is characterized in that: between the positive pole and negative pole of described microphone, be also parallel with coupling capacitance.
3. the hand miaow for intercom cellphone according to claim 1, it is characterized in that: described speakers pins comprises two, when described loud speaker receives difference audio signal, connect corresponding with the difference audio terminal of loud speaker respectively for the speakers pins described in two, transmission difference audio signal; When described loud speaker receives single-ended audio signal, connect corresponding with the left and right sound channels audio terminal of loud speaker respectively for the speakers pins described in two, transmission left and right sound channels audio signal.
4. the hand miaow for intercom cellphone according to claim 1, is characterized in that: described hand miaow interface is the four-section type headset interface of 2.5mm or 3.5mm or 10 pin MINI USB interface or 9 pin USB3.0 interfaces.
5., for a hand miaow for intercom cellphone, comprise hand miaow main body, for the hand miaow interface that connects intercom cellphone and the holding wire be connected between described hand miaow main body and hand miaow interface, described hand miaow main body be provided with loud speaker and microphone; It is characterized in that: in described hand miaow interface, definition has multiplexing pins and the grounding pin of speakers pins, power supply/insertion detection/microphone signal; Wherein, described speakers pins connects the loud speaker of hand miaow, the multiplexing pins described in positive pole connection of microphone in hand miaow, and the negative pole of microphone connects the ground wire of hand miaow, and described ground wire connects the grounding pin in hand miaow interface; The first resistance is parallel with between the positive pole and negative pole of described microphone; In described hand miaow interface, also definition has a button to detect pin; Described hand miaow main body is also provided with a talk button, and one end of described talk button is by the 3rd resistance of series connection or directly detect pin with described button and be connected, the ground wire of other end connection hand miaow;
Wherein, described speakers pins is provided with one or two; When single-ended monophonic audio signal supported by described loud speaker, in hand miaow interface, define a speakers pins, adopt a holding wire to be connected to the audio terminal of loud speaker; When described loud speaker receives difference audio signal or receives left and right sound channels audio signal, two speakers pins are defined in described hand miaow interface, when the loudspeaker requirements selected in hand miaow receives the monophonic audio signal of difference form, connect by a pair differential signal line is corresponding with the difference audio terminal of loud speaker respectively; When the loudspeaker requirements selected in hand miaow receives the left and right sound channels audio signal of single-ended format, connect by two audio signal wires are corresponding with the left and right sound channels audio terminal of loud speaker respectively.
6. the hand miaow for intercom cellphone according to claim 5, is characterized in that: between the positive pole and negative pole of described microphone, be also parallel with coupling capacitance.
7. the hand miaow for intercom cellphone according to claim 5, it is characterized in that: described speakers pins comprises two, when described loud speaker receives difference audio signal, connect corresponding with the difference audio terminal of loud speaker respectively for the speakers pins described in two, transmission difference audio signal; When described loud speaker receives single-ended audio signal, connect corresponding with the left and right sound channels audio terminal of loud speaker respectively for the speakers pins described in two, transmission left and right sound channels audio signal.
8. the hand miaow for intercom cellphone according to claim 5, is characterized in that: described hand miaow interface is the four-section type headset interface of 2.5mm or 3.5mm or 10 pin MINI USB interface or 9 pin USB3.0 interfaces.
9. an intercom cellphone, comprises mobile phone body, it is characterized in that: in described mobile phone body, be provided with the communication interface for being connected with the hand miaow any one of Claims 1-4 as described in claim, in described communication interface, definition has and multiple pins that position corresponding identical with the definition mode of each pin in described hand miaow interface, inner in mobile phone body, speakers pins in communication interface connects the output of audio amplifier circuit, the ADC interface of the multiplexing pins one side connection handling chip in communication interface, and connect DC power supply by the 5th resistance, on the other hand by the microphone signal input interface of capacitance connection handling chip, described DC power supply is introduced in miaow in one's hands by multiplexing pins, for the microphone power in hand miaow, by the magnitude of voltage size constantly detecting its ADC interface, process chip in mobile phone judges whether the insert state of hand miaow and talk button are pressed, and be inserted into after on intercom cellphone at hand miaow, by the microphone pickup on hand miaow to the voice that send of local user to convert the voltage signal of change to via the first resistance after, the microphone signal input interface of described process chip is transferred to by the described capacitance AC signal extracted wherein in mobile phone, carry out speech processes, grounding pin in communication interface connects mobile phone body systematically.
10. intercom cellphone according to claim 9, it is characterized in that: described communication interface and hand miaow interface are 10 pin MINI USB interface or the 9 pin USB3.0 interfaces of a pair coupling grafting, in described communication interface and hand miaow interface, all definition has an antenna leads, described antenna leads connects the frequency-modulated antenna in mobile phone body in intercom cellphone side, connects the ground wire of hand miaow in hand miaow side; In described communication interface, also definition has USB differential data transmission pin and charging pins; Described USB differential data transmission pin connects the process chip in mobile phone body, and charging pins connects the battery in mobile phone body.
11. 1 kinds of intercom cellphones, comprise mobile phone body, it is characterized in that: in described mobile phone body, be provided with the communication interface for being connected with the hand miaow such as according to any one of claim 5 to 8, in described communication interface, definition has and multiple pins that position corresponding identical with the definition mode of each pin in described hand miaow interface, inner in mobile phone body, the speakers pins in communication interface connects the output of audio amplifier circuit, the ADC interface of the multiplexing pins one side connection handling chip in communication interface, and connect DC power supply by the 5th resistance, on the other hand by the microphone signal input interface of capacitance connection handling chip, described DC power supply is introduced in miaow in one's hands by multiplexing pins, for the microphone power in hand miaow, by the magnitude of voltage constantly detecting its ADC interface, process chip in mobile phone judges whether hand miaow inserts, and be inserted into after on intercom cellphone at hand miaow, by the microphone pickup on hand miaow to the voice that send of local user to convert the voltage signal of change to via the first resistance after, the microphone signal input interface of described process chip is transferred to by the described capacitance AC signal extracted wherein in mobile phone, carry out speech processes, button in communication interface detects a road GPIO mouth of pin one side connection handling chip, and connect DC power supply by the 4th resistance on the other hand, by the level state detecting its GPIO mouth, the process chip in mobile phone judges whether talk button is pressed, grounding pin in communication interface connects mobile phone body systematically.
12. intercom cellphones according to claim 11, it is characterized in that: described communication interface and hand miaow interface are 10 pin MINI USB interface or the 9 pin USB3.0 interfaces of a pair coupling grafting, in described communication interface and hand miaow interface, all definition has an antenna leads, described antenna leads connects the frequency-modulated antenna in mobile phone body in intercom cellphone side, connects the ground wire of hand miaow in hand miaow side; In described communication interface, also definition has USB differential data transmission pin and charging pins; Described USB differential data transmission pin connects the process chip in mobile phone body, and charging pins connects the battery in mobile phone body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210149065.3A CN102710821B (en) | 2012-05-15 | 2012-05-15 | Hand microphone for interphone and interphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210149065.3A CN102710821B (en) | 2012-05-15 | 2012-05-15 | Hand microphone for interphone and interphone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102710821A CN102710821A (en) | 2012-10-03 |
| CN102710821B true CN102710821B (en) | 2015-05-20 |
Family
ID=46903365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210149065.3A Active CN102710821B (en) | 2012-05-15 | 2012-05-15 | Hand microphone for interphone and interphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102710821B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104599672B (en) * | 2013-10-31 | 2018-04-03 | 瑞昱半导体股份有限公司 | There are the audio codec and audio grafting detection method of audio grafting detectability |
| CN104954338B (en) * | 2014-03-31 | 2018-03-23 | 中国电信股份有限公司 | Mobile phone talkback service adapter, Mobile phone talkback service terminal and Mobile phone talkback method |
| CN108347513A (en) * | 2018-01-10 | 2018-07-31 | 深圳优仕康通信有限公司 | A kind of dialing radio station, dialing radio station gateway and radio station system |
| CN109921815B (en) * | 2019-03-26 | 2024-03-08 | 福建科立讯通信有限公司 | Recognition device and recognition method for whether vehicle-mounted interphone hand microphone is placed into hanging rack |
| CN112202949B (en) * | 2020-09-27 | 2022-06-24 | 厦门亿联网络技术股份有限公司 | USB peripheral, telephone equipment and telephone system |
| CN115499026B (en) * | 2022-08-11 | 2023-12-08 | 贵州电网有限责任公司 | Tool for checking solidified safety tool before use |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2428930Y (en) * | 2000-07-07 | 2001-05-02 | 王健华 | Direct power-supplying sound-controlled switch-on device for wireless intercom |
| CN102300003A (en) * | 2011-09-20 | 2011-12-28 | 惠州Tcl移动通信有限公司 | Mobile terminal capable of automatically detecting earphone jack |
| CN102404665A (en) * | 2010-09-07 | 2012-04-04 | 中兴通讯股份有限公司 | Earphone interface self-adaptation circuit |
-
2012
- 2012-05-15 CN CN201210149065.3A patent/CN102710821B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2428930Y (en) * | 2000-07-07 | 2001-05-02 | 王健华 | Direct power-supplying sound-controlled switch-on device for wireless intercom |
| CN102404665A (en) * | 2010-09-07 | 2012-04-04 | 中兴通讯股份有限公司 | Earphone interface self-adaptation circuit |
| CN102300003A (en) * | 2011-09-20 | 2011-12-28 | 惠州Tcl移动通信有限公司 | Mobile terminal capable of automatically detecting earphone jack |
Non-Patent Citations (1)
| Title |
|---|
| 陈经纶.YEASU系列对讲机手咪接口定义(图).《百度空间》.2007,全文. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102710821A (en) | 2012-10-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201928419U (en) | Earphone and mobile communication terminal provided with same | |
| CN102710821B (en) | Hand microphone for interphone and interphone | |
| CN104023294B (en) | Interface duplex device and pinboard in terminal | |
| CN104620567B (en) | The system and method for ground wire and microphone input contact for detection in audio jack | |
| CN201509235U (en) | Headphone detection circuit of mobile terminal and mobile terminal thereof | |
| CN203167074U (en) | Mobile terminal configured with reuse interface | |
| EP1315361A1 (en) | Multiconnector for mobile terminal | |
| CN101841588B (en) | Audio interface device and electronic device using same | |
| CN201142743Y (en) | Headphone interface circuit and mobile phone with the same | |
| CN101841753A (en) | Drive-by-wire earphone for portable electronic equipment and method for realizing drive-by-wire | |
| CN206042256U (en) | Bluetooth headset audio amplifier integrated device | |
| CN102073470B (en) | Electronic equipment and control method thereof | |
| CN110166867A (en) | Digital earphone and electric terminal | |
| CN202750144U (en) | Walkie-talkie mobile phone | |
| CN101990144A (en) | Double earphone adapter, main board and method for detecting double earphones | |
| CN107770662A (en) | A kind of automatic charging and the implementation method and circuit of switching on and shutting down | |
| CN203243488U (en) | Headset adapter device and mobile terminal | |
| CN201898602U (en) | Passive sound box interface of mobile phone | |
| CN105898655A (en) | Signal output circuit and mobile terminal | |
| CN210958736U (en) | External wireless mobile phone sound card | |
| CN208971751U (en) | A kind of wireless headset based on voice communication | |
| CN209963815U (en) | Charging adapter | |
| US20130259257A1 (en) | Corded audio device with wireless data exchange | |
| CN111987752A (en) | Switching equipment | |
| CN202713580U (en) | Earphone compatible interface circuit for terminal device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Applicant after: Qingdao Hisense Mobile Communication Technology Co., Ltd. Address before: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218 Applicant before: Qingdao Hisense Mobile Communication Technology Co., Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |