CN206542400U - A kind of digital handset - Google Patents
A kind of digital handset Download PDFInfo
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- CN206542400U CN206542400U CN201720007480.3U CN201720007480U CN206542400U CN 206542400 U CN206542400 U CN 206542400U CN 201720007480 U CN201720007480 U CN 201720007480U CN 206542400 U CN206542400 U CN 206542400U
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- integrated talkback
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- talkback chip
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- digital handset
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Abstract
The utility model provides a kind of digital handset, it includes possessing the integrated talkback chip of zero intermediate frequency digital communication functions, Transmit Receive Unit, audio output unit and miaow head, the integrated talkback chip receives radiofrequency signal by the Transmit Receive Unit, generate zero intermediate frequency signals, and export to the audio output unit, the integrated talkback chip receives voice messaging by the miaow head, and exports and meet the radiofrequency signal of preset standard to the Transmit Receive Unit；By possessing the digital handset that the integrated talkback chip of zero intermediate frequency digital communication functions is designed, its small volume, and circuit structure is simple, solve the problem of existing digital handset design structure is complicated, also greatly it is convenient to designing and developing for research staff simultaneously, greatly reduce exploitation threshold, and production cost.
Description
Technical field
The utility model is related to intercom technical field, more particularly to a kind of digital handset.
Background technology
With the fast development of social economy, radio communication is indispensable in people's daily life, either public
Network Communication or specialized communication are all widely used.Especially specialized communication field, the scope of business expands day by day, and user is to more
Business, high-quality wireless communication technology product are very urgent, while in view of the reasonable utilization to communication spectrum resource, tradition
Analog communication system can not meet active user's demand, " No. 666 files " issued along with Ministry of Industry and Information, wireless talkback
Machine is changed into trend by simulation-to-digital, also into certainty.Yet with factors such as technology, costs, in the market still with
Using being in the great majority on analog-interphone number of users.Although the digital handset having been developed, its system architecture,
The design such as circuit is complex and production cost is also prohibitively expensive, can not reach the demand for development generally used.
Utility model content
The utility model provides a kind of digital handset, to solve the skill that existing digital handset design structure is complicated
Art problem.
The utility model provides a kind of digital handset, including：Power supply unit, with zero intermediate frequency digital communication functions
Integrated talkback chip, and the Transmit Receive Unit and audio output unit being connected respectively with the integrated talkback chip；It is described
Power supply unit is that the integrated talkback chip, Transmit Receive Unit and audio output unit are powered；The integrated talkback chip leads to
Cross the Transmit Receive Unit and receive radiofrequency signal, generate zero intermediate frequency signals, and export to the audio output unit.
Further, the digital handset also include voltage-controlled compensated oscillator, it is described it is voltage-controlled compensation oscillator with it is described
The digital-to-analog conversion output connection of integrated talkback chip, and export reference data frequency, the integrated talkback chip according to
The reference data frequency is adjusted to the radiofrequency signal, obtains zero intermediate frequency signals.
Further, the audio output unit includes loudspeaker and audio-frequency amplifier, the audio-frequency amplifier and the collection
Into the connection of intercommunication chip, the zero intermediate frequency signals are amplified processing, and export by the loudspeaker.
Further, the Transmit Receive Unit includes the antenna being sequentially connected, low pass filter, RF switch, band logical
Wave filter and low-noise amplifier；In receive state, the radiofrequency signal that the antenna is received passes through the low pass filter
And RF switch, and export to bandpass filter progress frequency-selecting, then pass through output after the low-noise amplifier amplifies
To the integrated talkback chip.
Further, the digital handset also includes miaow head, simulation/number of the miaow head and the integrated talkback chip
Word conversion inputs are connected, and the integrated talkback chip receives voice messaging by the miaow head, and output meets preset standard
Radiofrequency signal to the Transmit Receive Unit.
Further, the Transmit Receive Unit also includes power amplifier and automatic power control circuit, the power
Amplifier is arranged between the RF switch and the integrated talkback chip；The power amplifier is according to the automated power
The radiofrequency signal that the offset signal of control circuit output is exported to the integrated talkback chip is amplified, and passes through the radio frequency
Switch and low pass filter, are launched by the antenna.
Further, the digital handset also includes：Push-button unit, the push-button unit and the integrated talkback chip
Control end connection, for output control instruction.
Further, the digital handset also includes：Display unit, the display unit and the integrated talkback chip
Connection, the control interface for digital handset.
Further, the digital handset also includes：Data communication interface unit, the data communication interface unit with
The integrated talkback chip connection.
Further, the data communication interface unit connects including synchronous serial interface, asynchronous serial communication interface and USB
Mouthful.
The beneficial effects of the utility model：
The utility model provides a kind of digital handset, and the intercom passes through with zero intermediate frequency digital communication functions
On the basis of integrated talkback chip, increase some simple auxiliary circuits to realize, it is only necessary to which few peripheral circuit is that can be achieved
Radio-frequency transmissions function, the circuit structure of the design method is simple, and cost is also than relatively low；Not only solve existing digital intercom electromechanical
The problem of line structure blocking is complicated, Computer Aided Design is more, also significantly reduces production cost.
Brief description of the drawings
The structural representation for the digital handset that Fig. 1 provides for the utility model first embodiment；
Another structural representation for the digital handset that Fig. 2 provides for the utility model first embodiment；
The structural representation for the digital handset that Fig. 3 provides for the utility model second embodiment；
The structural representation for the integrated talkback chip that Fig. 4 provides for the utility model second embodiment.
Embodiment
The further annotation explanation of output is now done to the utility model by way of embodiment combination accompanying drawing.
First embodiment：
The structural representation for the digital handset that Fig. 1 provides for the utility model first embodiment, as shown in Figure 1, at this
In embodiment, the digital handset that the utility model is provided includes：Power supply unit 11, the collection with zero intermediate frequency digital communication functions
Into intercommunication chip SOC 12 (system level chip), and the Transmit Receive Unit 13 being connected respectively with the integrated talkback chip 12
With audio output unit 14.
Said supply unit 11 respectively with the integrated talkback chip, Transmit Receive Unit 13 and audio output unit 14
Power end is connected, and provides operating voltage for it, and the operating voltage includes first for doing voltage and the second operating voltage, wherein,
First operating voltage is 1.4V, for for the control unit (MCU) and digital processing list in the integrated talkback chip 12
First (DSP) provides operating voltage, and second operating voltage is 2.4V, at for the radio frequency in the integrated talkback chip 12
Manage circuit and operating voltage is provided.
In the present embodiment, the integrated talkback chip 12 receives radio frequency from the external world by the Transmit Receive Unit 13 and believed
Number, the Transmit Receive Unit 13 by the radiofrequency signal received after filtering, amplification etc. processing after input to integrated talkback core
Radiofrequency signal after filtering, enhanced processing is converted to zero intermediate frequency signals by piece 13, the integrated talkback chip 12, and is exported to sound
Frequency output unit 14.
As shown in Fig. 2 the Transmit Receive Unit 13 includes antenna 131, low pass filter 132, RF switch 133, band
Bandpass filter 134, low-noise amplifier 135 and power amplifier 136；The digital handset in receive state, leads to first
Cross the antenna 131 and sense the radiofrequency signal in the external world, and receive input in the low pass filter 132, the LPF
Device 132 filters out the undesirable high-frequency signal in the radiofrequency signal, is met the radiofrequency signal of condition, Ran Houzai
The radiofrequency signal for the condition that meets is exported to the bandpass filter 134, the bandpass filter 134 by RF switch 133
To the radiofrequency signal received is carried out into frequency-selecting processing, then Row noise enhanced processing is entered by above-mentioned low noise amplifier 135, will put
Radiofrequency signal after big post processing is exported to integrated talkback chip 12, and the integrated talkback chip 12 is further according to the radio frequency received
Signal generation zero intermediate frequency signals, are exported by audio output unit 14 with speech form.
When the digital handset is transmitting working condition, the digital handset also includes miaow first 15, the miaow head
The voice signal of 15 collection user's inputs, is exported to the integrated talkback chip 12, described 12 pairs of institute's predicates of integrated talkback chip
Message number carries out analog-to-digital conversion process, while carrying out the processing such as encoding to the signal after conversion, obtains meeting DMR consensus standards
Radiofrequency signal, the power mark that the power amplifier 136 launches the radiofrequency signal for meeting DMR consensus standards according to equipment
Standard is amplified, and reaches corresponding power standard, processing is being filtered by low pass filter 132, finally by described
Antenna 131 is outwards launched.
In the present embodiment, the integrated talkback chip 12 is when carrying out the conversion of radiofrequency signal, particular by use
Function algorithm, generates and exports the staircase waveform of rising edge gradual change and trailing edge gradual change according to the voice signal of input, such as Fig. 2 institutes
Show, the digital handset also includes automatic power control circuit 137, the automatic power control circuit 137 is the power
Amplifier 136 exports offset signal, and the power amplifier 136 is exported according to the offset signal to the integrated talkback chip
Radiofrequency signal be amplified, and pass through the RF switch 133 and low pass filter 132, launched by the antenna 131
Go.
In the present embodiment, the digital handset also includes voltage-controlled compensated oscillator 16, the voltage-controlled compensation oscillator
16 are connected with the digital-to-analog conversion output of the integrated talkback chip 12, and export reference data frequency, and the collection is paired
Say that chip 12 is adjusted according to the reference data frequency to the radiofrequency signal, obtain zero intermediate frequency signals.
As shown in Fig. 2 the audio output unit 14 includes loudspeaker 141 and audio-frequency amplifier 142, the audio-frequency amplifier
142 are connected with the integrated talkback chip 12, and the zero intermediate frequency signals are amplified into processing, and defeated by the loudspeaker 141
Go out.
A kind of digital handset is present embodiments provided, it includes the integrated talkback core for possessing zero intermediate frequency digital communication functions
Piece, Transmit Receive Unit, audio output unit and miaow head, the integrated talkback chip are received by the Transmit Receive Unit and penetrated
Frequency signal, generates zero intermediate frequency signals, and exports to the audio output unit, and the integrated talkback chip is connect by the miaow head
Voice messaging is received, and exports and meets the radiofrequency signal of preset standard to the Transmit Receive Unit；By possessing zero intermediate frequency numeral
The digital handset of the integrated talkback chip design of communication function, its small volume, and circuit structure is simple, solves existing number
The problem of word intercom design structure is complicated, while being also greatly convenient to designing and developing for research staff, is greatly reduced out
Send out threshold, and production cost.
Further annotation explanation is done to the utility model in conjunction with concrete application scene.
Second embodiment：
The circuit for the digital handset that the present embodiment is related to is as shown in figure 3, it includes：Possess zero intermediate frequency digital communication functions
Integrated talkback chip SOC (system level chip) 12, by the voltage-controlled compensated oscillators 16 of VC-TCXO, radio circuit, MCU, acoustic code
Device, D/A converter, A/D converter etc. part are constituted, antenna 131, LPF low pass filters 132, RF SWICH RF switches
133, BPF bandpass filters 134, LNA low-noise amplifiers 135, PA power amplifiers 136, APC automatic power control circuits
137, MIC miaows first 15；SPKER loudspeaker 141, AUDIO AMP audio-frequency amplifiers 142, battery 17.
When launching work, the MIC produces voice signal and enters integrated talkback chip 12, in integrated talkback chip 12
In, sampled first by A/D converter, after the completion of sampling, send into vocoder, after feeding MCU is encoded after vocoder processing,
4FSK modulation is carried out, subsequently into radio circuit, radio circuit produces the RF signal outputs for meeting DMR consensus standards, RF signals
Entered PA and be amplified to 4W/5W, gone out after RF switch, low pass filter from aerial radiation.
When receiving work, the RF signals of antenna induction are after LPF low pass filters 132, RF SWICH RF switches 133
Carry out after frequency-selecting, entered back into after low-noise amplifier 135 amplifies by entering integrated talkback chip into bandpass filter 134
12；In integrated talkback chip 12, zero intermediate frequency DMR modulated signals are exported through radio circuit first, it is complete that modulated signal is sent to MCU
Enter into 4FSK demodulation, after decoding after entering D/A samplings after vocoder, the vocoder solution compress speech and enter audio-frequency amplifier
After 142 amplifications in feeding loudspeaker 141.
In actual applications, the power amplifier 136 uses the amplification of at least two-stage, it is preferred that in the present embodiment,
The power amplifier 136 includes three amplifications, wherein every grade of amplifier is all connected with APC automatic power control circuits 137, root
The power for the radiofrequency signal that the offset signal adjustment power amplifier 136 exported according to APC automatic power control circuits 137 is exported,
Specifically, the APC automatic power control circuits 137 are used to detect the real-time current that power supply unit provides for power amplifier,
The real-time amplifying power of checkerberry amplifier 136 is determined according to real-time current.
In the present embodiment, the digital handset also includes push-button unit, display unit and data communications interface unit,
The push-button unit is connected with the control end of the integrated talkback chip, for output control instruction；Display unit, the display
Unit is connected with the integrated talkback chip, the control interface for digital handset；The data communication interface unit and institute
State the connection of integrated talkback chip.
In the present embodiment, the data communication interface unit include synchronous serial interface, asynchronous serial communication interface and
USB interface.
The core of the present embodiment is integrated talkback chip 12, and it is used to using function algorithm, generation rising edge gradual change and under
So, digital handset realizes using staircase waveform to generate offset signal staircase waveform of the drop along gradual change, controls power amplifier
Amplifying power, in whole process, because the rising edge and trailing edge of staircase waveform are all slow gradual changes, correspondence generation it is inclined
The change of confidence number is also gradual change, on this basis, and the amplifying power of power amplifier is also slow rising and declined, full
When the digital handset transmission power rapid increase of foot DMR requirements is with declining, power curve needs slow on request rise with
Drop, meanwhile, the slow rising and decline of this power curve can also reduce scattering when time slot switches, and reduce to other cores
The interference of piece or device.
Meanwhile, the present embodiment also provides a kind of specific schematic diagram of integrated talkback chip 12, as shown in figure 4, this implementation
The integrated talkback chip 12 that example is provided includes：Digital Signal Processing DSP unit 41,16 voice signal codec units 42, sounds
Frequency output power amplifier unit 43, microphone amplifying circuit unit 44,32 reduced instruction microprocessor units 45, power supply pipes
Manage PMU units 46,16MB PSRAM memory cells 47,16MB FLASH memories unit 48 and radio frequency mobile radio reception
Machine transmitter unit 49, and some unshowned data-interfaces etc.；Wherein, 16MB PSRAM memory cells 47 and 16MB
FLASH memory unit 48 can exist simultaneously, can also only exist one；Radio frequency mobile radio receiver transmitter unit
49 are used to use low pressure (2.4V) wideband (100-500MHz, 700-1000MHz) voltage-controlled technical finesse data, power management
(PMU) voltage (3.2-4.2V, generally 3.7V) that the external world is provided is converted to 1.4V and 2.4V voltages, wherein 1.4V by unit 46
Voltage makes for Digital Signal Processing (DSP) unit 41,6MB PSRAM memory cells 47,16MB FLASH memories unit 48
With 2.4V voltages are used for other units.
In summary, implemented by of the present utility model, at least there is following beneficial effect：
The utility model provides a kind of digital handset, and it includes the integrated talkback for possessing zero intermediate frequency digital communication functions
Chip, Transmit Receive Unit, audio output unit and miaow head, the integrated talkback chip are received by the Transmit Receive Unit
Radiofrequency signal, generates zero intermediate frequency signals, and exports to the audio output unit, and the integrated talkback chip passes through the miaow head
Voice messaging is received, and exports and meets the radiofrequency signal of preset standard to the Transmit Receive Unit；By possessing zero intermediate frequency number
The digital handset of the integrated talkback chip design of word communication function, its small volume, and circuit structure is simple, solves existing
The problem of digital handset design structure is complicated, while being also greatly convenient to designing and developing for research staff, is greatly reduced
Develop threshold, and production cost.
It the above is only embodiment of the present utility model, any formal limit not done to the utility model
System, every any simple modification, equivalent variations, combination made according to technical spirit of the present utility model to embodiment of above
Or modification, still fall within the protection domain of technical solutions of the utility model.
Claims (10)
1. a kind of digital handset, it is characterised in that including：Power supply unit, the collection with zero intermediate frequency digital communication functions are paired
Say chip, and the Transmit Receive Unit and audio output unit being connected respectively with the integrated talkback chip；The power supply is single
Member is powered for the integrated talkback chip, Transmit Receive Unit and audio output unit；The integrated talkback chip passes through described
Transmit Receive Unit receives radiofrequency signal, generates zero intermediate frequency signals, and export to the audio output unit.
2. digital handset according to claim 1, it is characterised in that also including voltage-controlled compensated oscillator, described voltage-controlled
Compensation oscillator is connected with the digital-to-analog conversion output of the integrated talkback chip, and exports reference data frequency, described
Integrated talkback chip is adjusted according to the reference data frequency to the radiofrequency signal, obtains zero intermediate frequency signals.
3. digital handset according to claim 2, it is characterised in that the audio output unit includes loudspeaker and audio
Amplifier, the audio-frequency amplifier is connected with the integrated talkback chip, the zero intermediate frequency signals is amplified into processing, and lead to
Cross the loudspeaker output.
4. digital handset according to claim 3, it is characterised in that the Transmit Receive Unit includes what is be sequentially connected
Antenna, low pass filter, RF switch, bandpass filter and low-noise amplifier；In receive state, the antenna is received
Radiofrequency signal pass through the low pass filter and RF switch, and export to the bandpass filter and carry out frequency-selecting, then lead to
Exported after crossing the low-noise amplifier amplification to the integrated talkback chip.
5. the digital handset according to any one of Claims 1-4, it is characterised in that also including miaow head, the miaow head with
The analog/digital conversion input connection of the integrated talkback chip, the integrated talkback chip receives language by the miaow head
Message ceases, and exports and meet the radiofrequency signal of preset standard to the Transmit Receive Unit.
6. digital handset according to claim 5, it is characterised in that the Transmit Receive Unit also includes power amplification
Device and automatic power control circuit, the power amplifier are arranged between the RF switch and the integrated talkback chip；
What the offset signal that the power amplifier is exported according to the automatic power control circuit was exported to the integrated talkback chip
Radiofrequency signal is amplified, and passes through the RF switch and low pass filter, is sent out by the antenna in the Transmit Receive Unit
It is shot out.
7. digital handset according to claim 6, it is characterised in that also include：Push-button unit, the push-button unit with
The control end connection of the integrated talkback chip, for output control instruction.
8. digital handset according to claim 7, it is characterised in that also include：Display unit, the display unit
It is connected with the integrated talkback chip, the control interface for digital handset.
9. digital handset according to claim 7, it is characterised in that also include：Data communication interface unit, the number
It is connected according to communications interface unit with the integrated talkback chip.
10. digital handset according to claim 9, it is characterised in that the data communication interface unit includes synchronous
Serial line interface, asynchronous serial communication interface and USB interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720007480.3U CN206542400U (en) | 2017-01-04 | 2017-01-04 | A kind of digital handset |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720007480.3U CN206542400U (en) | 2017-01-04 | 2017-01-04 | A kind of digital handset |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206542400U true CN206542400U (en) | 2017-10-03 |
Family
ID=59938662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720007480.3U Active CN206542400U (en) | 2017-01-04 | 2017-01-04 | A kind of digital handset |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206542400U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108449111A (en) * | 2018-04-26 | 2018-08-24 | 泉州欧讯电子有限公司 | It is a kind of simulation, digital intercom all-in-one machine |
| CN110958033A (en) * | 2019-11-29 | 2020-04-03 | 广东寰宇电子科技股份有限公司 | Method and terminal for controlling communication of half-duplex digital intercom system |
| CN111092624A (en) * | 2018-10-23 | 2020-05-01 | 成都共同进步信息技术有限公司 | Broadcasting device with DMR digital intercommunication function |
-
2017
- 2017-01-04 CN CN201720007480.3U patent/CN206542400U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108449111A (en) * | 2018-04-26 | 2018-08-24 | 泉州欧讯电子有限公司 | It is a kind of simulation, digital intercom all-in-one machine |
| CN111092624A (en) * | 2018-10-23 | 2020-05-01 | 成都共同进步信息技术有限公司 | Broadcasting device with DMR digital intercommunication function |
| CN110958033A (en) * | 2019-11-29 | 2020-04-03 | 广东寰宇电子科技股份有限公司 | Method and terminal for controlling communication of half-duplex digital intercom system |
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