CN106788490A - The frequency modulation(PFM) radiating circuit and terminal device of a kind of terminal device - Google Patents
The frequency modulation(PFM) radiating circuit and terminal device of a kind of terminal device Download PDFInfo
- Publication number
- CN106788490A CN106788490A CN201611169212.8A CN201611169212A CN106788490A CN 106788490 A CN106788490 A CN 106788490A CN 201611169212 A CN201611169212 A CN 201611169212A CN 106788490 A CN106788490 A CN 106788490A
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- China
- Prior art keywords
- module
- pfm
- frequency modulation
- terminal device
- power
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- 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.)
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0408—Circuits with power amplifiers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0491—Circuits with frequency synthesizers, frequency converters or modulators
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
Abstract
The embodiment of the invention discloses the frequency modulation(PFM) radiating circuit and terminal device of a kind of terminal device.The control instruction of frequency modulation(PFM) and pre-amplification module in the frequency modulation(PFM) radiating circuit of the embodiment of the present invention according to the master controller of terminal device, the audio signal that the audio-frequency module of terminal device is exported is carried out frequency modulation(PFM) and carries out signal pre-amplification, export carries out power amplification to power amplifier module, again impedance matching is carried out through impedance matching module, launch through antenna, the printed circuit plate suqare of the frequency modulation(PFM) radiating circuit is smaller and circuit cost performance is higher, can be applied to terminal device, audio file in terminal device is sent to vehicle mounted multimedia and is played out.
Description
Technical field
The present invention relates to frequency modulation(PFM) (English：Frequency Modulation, referred to as：FM) lift-off technology field, tool
Body is related to a kind of frequency modulation(PFM) radiating circuit of terminal device and terminal device.
Background technology
Due in the ascendant, the various terminal equipment such as car-mounted terminal, mobile terminal of car networking, all seek and many matchmakers of automobile
Body equipment wireless connection, to lift the recreation experience of in-car.Specific radio connection including FM, bluetooth, Wi-Fi etc., its
In, FM wireless connections enjoy favor due to low cost with various vehicles are adapted to extensively, but not yet have printed circuit board (English at present
Text：Printed Circuit Broad, referred to as：PCB) area is smaller and circuit cost performance is higher is applied to terminal device
Frequency modulation(PFM) radiating circuit.
The content of the invention
The embodiment of the present invention provides a kind of the frequency modulation(PFM) radiating circuit and terminal device of terminal device, to provide printing electricity
The frequency modulation(PFM) radiating circuit for being applied to terminal device that road plate suqare is smaller and circuit cost performance is higher.
A kind of first aspect, there is provided the frequency modulation(PFM) radiating circuit of terminal device, including：Power module and the electricity
The power amplifier module of source module connection and the frequency modulation(PFM) and pre-amplification module and impedance of power amplifier module connection
With the antenna that module and the impedance matching module are connected, the frequency modulation(PFM) and pre-amplification module are also connected with the terminal and set
Standby master controller and audio-frequency module；
The power module is used to be powered to the power amplifier module；
The frequency modulation(PFM) and pre-amplification module are used for the first control instruction according to the master controller, by the audio
The audio signal of module output carries out frequency modulation(PFM) and carries out signal pre-amplification, exports to the power amplifier module；
The power amplifier module is used to carry out what is received frequency modulation(PFM) and carry out the letter of the audio after signal pre-amplification
Number carry out power amplification, output to the impedance matching module；
The impedance matching module is used to that impedance matching will to be carried out through the audio signal of power amplification, launches through the antenna
Go out.
Preferably, the power module include power supply and with the master controller, the power supply, the power amplification
The power switching module of module connection；
The power switching module is used for according to the second control instruction of the master controller, the control connection power supply or
Disconnect the connection with the power supply.
Preferably, the power module also includes the liter being connected with the power switching module, the power amplifier module
Die block；
The boost module is used to be boosted the power supply.
Preferably, the filtering mould also including the connection frequency modulation(PFM) and pre-amplification module and the power amplifier module
Block；
The filtration module is used to carry out frequency modulation(PFM) and carry out the audio signal after signal pre-amplification carrying out by described
Filter.
Preferably, the impedance matching module is double pi type matching modules.
Preferably, it is described to carry out warbled scope for 87.5~108MHZ.
A kind of second aspect, there is provided terminal device, including master controller, connect the master controller audio-frequency module,
And the frequency modulation(PFM) radiating circuit described in the first aspect of the connection master controller and the audio-frequency module；
The frequency modulation(PFM) radiating circuit is used for the first control command according to the master controller, by the audio-frequency module
The audio signal of output is launched after carrying out frequency modulation(PFM).
Preferably, after the frequency modulation(PFM) radiating circuit by the audio signal of the output specifically for carrying out frequency modulation(PFM)
Vehicle-mounted multimedia equipment is transmitted to play out.
Implement the frequency modulation(PFM) radiating circuit and terminal device of a kind of terminal device provided in an embodiment of the present invention, with such as
Lower beneficial effect：
The control of frequency modulation(PFM) and pre-amplification module in frequency modulation(PFM) radiating circuit according to the master controller of terminal device
Instruction, the audio signal that the audio-frequency module of terminal device is exported is carried out frequency modulation(PFM) and carries out signal pre-amplification, is exported to work(
Rate amplification module carries out power amplification, then carries out impedance matching through impedance matching module, launches through antenna, the frequency modulation(PFM)
The printed circuit plate suqare of radiating circuit is smaller and circuit cost performance is higher, can be applied to terminal device, by terminal device
Audio file sends to vehicle mounted multimedia and plays out.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
It is a kind of structural representation of terminal device provided in an embodiment of the present invention that Fig. 1 is；
Fig. 2 is further refined for the frequency modulation(PFM) radiating circuit of the terminal device of the embodiment of the present invention provided Fig. 1
Structural representation；
Fig. 3 is the module principle figure of a frequency modulation(PFM) transmitter module of example.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Fig. 1 is referred to, Fig. 1 is a kind of structural representation of terminal device provided in an embodiment of the present invention, the terminal device
Including master controller 11, audio-frequency module 12 and frequency modulation(PFM) radiating circuit 13, the frequency modulation(PFM) radiating circuit 13 includes power supply mould
The frequency modulation(PFM) of the power amplifier module 132 and the connection of power amplifier module 132 of block 131 and the connection of power module 131 and pre-
Amplification module 133 and impedance matching module 134 and the antenna 135 of the connection of impedance matching module 134, master controller 11 connect electricity
Source module 131 and frequency modulation(PFM) and pre-amplification module 133, the modulation of the rate of connections of audio-frequency module 12 and pre-amplification module 133.Audio
Audio file is stored in module 12 or audio file is obtained from server.The terminal device can be mobile terminal or various vehicle-mounted
Terminal.
In Fig. 1, power module 131 is used to be powered to the power amplifier module；
The frequency modulation(PFM) and pre-amplification module 133 are used for the first control instruction according to the master controller 11, by institute
The audio signal for stating the output of audio-frequency module 12 carries out frequency modulation(PFM) and carries out signal pre-amplification, exports to the power amplifier module
132；
The power amplifier module 132 is used to carry out what is received frequency modulation(PFM) and carry out the audio after signal pre-amplification
Signal carries out power amplification, output to the impedance matching module 134；
The impedance matching module 134 is used to that impedance matching will to be carried out through the audio signal of power amplification, through the antenna
135 launch.
Specifically, sent out after frequency modulation(PFM) radiating circuit 13 by the audio signal of the output specifically for carrying out frequency modulation(PFM)
Penetrate and played out to vehicle-mounted multimedia equipment.
Mobile terminal or car-mounted terminal are typically stored with the audio file that user likes, now, are set without vehicle mounted multimedia
Standby storage re-downloads this document, only needs the audio file that mobile terminal or car-mounted terminal user's control are stored or downloaded
Vehicle-mounted multimedia equipment is transmitted to play out.
Fig. 2 is referred to, Fig. 2 enters for the frequency modulation(PFM) radiating circuit of the terminal device of the embodiment of the present invention provided Fig. 1
The structural representation of step refining.In fig. 2, the power module include power supply and with the master controller, the electricity
Source, the power switching module of power amplifier module connection；
The power switching module is used for according to the second control instruction of the master controller, the control connection power supply or
Disconnect the connection with the power supply.
Further, the power module also includes being connected with the power switching module, the power amplifier module
Boost module；
The boost module is used to be boosted the power supply.
Specifically, in fig. 2, master controller controls power supply by the control signal input POWER_CTRL of power module
The break-make of switch module, during the controlled closure of power switching module, power supply Vbat is input to boost module.Boost module is put with power
Big module is connected, and power amplifier module is supplied to after Vbat is boosted.
Specifically, in fig. 2, the modulates audio signals that be input into for HP_MP3R, HP_MP3L by FM modulation and pre-amplification module
And pre-amplification, I2C buses are used to be communicated with the master controller of terminal device, and master controller passes through I2C buses issue frequency modulation instruction.
This channel frequency is adjustable, and tuning range is 87.5~108MHZ.
In fig. 2, the frequency modulation(PFM) radiating circuit also includes the connection frequency modulation(PFM) and pre-amplification module and the work(
The filtration module of rate amplification module；
The filtration module is used to carry out frequency modulation(PFM) and carry out the audio signal after signal pre-amplification carrying out by described
Filter.
In fig. 2, the filtration module is specially LC filtration modules, and impedance matching module is double pi type matching modules.Through adjusting
System and pre-amplification after signal by LC filtration modules filter ingoing power amplification module further amplify, power amplifier module with
There are a pair of pi type match circuits between antenna, for impedance matching, to obtain preferably signal radiation effect.
Fig. 3 is referred to, Fig. 3 is the module principle figure of a frequency modulation(PFM) transmitter module of example.In figure 3, power MOS
Q2 is managed and is constituted power switching module with triode Q1 and control signal POWER_CTRL, Q2 conductings when POWER_CTRL puts high,
Vbat is input to boost module (preferred Q1 is MMBT3904TT1G, and Q2 is GM3415LT)；Boost module is main to be risen by switch
Vbat is boosted to work(by pressure chip U1, power inductance L1, Schottky diode D1, and filter capacitor C3 composition, boost module
(preferred U1 is HR2108 to power supply FM_12V needed for rate amplification module, and L1 is DAP252012NH-4R7N, and D1 is
FSB1104)；FM is modulated and pre-amplification module is by chip U1 and and the input of each control signal (such as I2C, FM-CLK, POWER_CTRL
Deng) constitute, I2C buses are used to be communicated with the master controller of terminal device, and master controller issues frequency modulation and instructs by I2C buses
, by HP_MP3R, HP_MP3L is input into for (this module frequency is adjustable, tuning range 87.5-108MHz), FM modulation and pre-amplification module
Modulates audio signals and pre-amplification after through the filtering of LC filtration modules be input to power amplifier module to carry out power amplification (preferred
U1 is SI4713-B30-GM)；By L2, C4 is in parallel to be constituted LC filtration modules；Power amplifier module is by R8, R9, Q3, L3, C6 structure
It is power amplifier tube into, wherein Q3, R8, R9 composition autobias module, L3 and C6 composition frequency-selective networks, (preferred Q3 is
2SK3078, L3 are 330nH, and C6 is 1nF)；Radiation-emitting is carried out by antenna through the signal after power amplification；Antenna is put with power
Big intermodule has by C7, double pi types matching modules of C9, C10, C11 and L4 composition.
The frequency modulation(PFM) radiating circuit of the embodiment of the present invention keep its transmission power and stability while, with smaller
PCB surface product and outstanding circuit cost performance.
In the embodiment of the present invention, the frequency modulation(PFM) and pre-amplification module in frequency modulation(PFM) radiating circuit are according to terminal device
The control instruction of master controller, carries out the audio signal that the audio-frequency module of terminal device is exported frequency modulation(PFM) and to carry out signal pre-
Amplify, export carries out power amplification to power amplifier module, then carries out impedance matching through impedance matching module, launches through antenna
Go, the printed circuit plate suqare of the frequency modulation(PFM) radiating circuit is smaller and circuit cost performance is higher, can be applied to terminal device, will
Audio file in terminal device sends to vehicle mounted multimedia and plays out.
It should be noted that for foregoing each method embodiment, in order to be briefly described, therefore it is all expressed as a series of
Combination of actions, but those skilled in the art should know, the present invention not by described by sequence of movement limited because
According to the present invention, some steps can sequentially or simultaneously be carried out using other.Secondly, those skilled in the art should also know
Know, embodiment described in this description belongs to preferred embodiment, involved action and module is not necessarily of the invention
It is necessary.
In the above-described embodiments, the description to each embodiment all emphasizes particularly on different fields, and does not have the portion described in detail in certain embodiment
Point, may refer to the associated description of other embodiment.
Through the above description of the embodiments, it is apparent to those skilled in the art that the present invention can be with
Realized with hardware, or firmware is realized, or combinations thereof mode is realized.When implemented in software, can be by above-mentioned functions
Storage is transmitted in computer-readable medium or as one or more instructions on computer-readable medium or code.Meter
Calculation machine computer-readable recording medium includes computer-readable storage medium and communication media, and wherein communication media includes being easy to from a place to another
Any medium of individual place transmission computer program.Storage medium can be any usable medium that computer can be accessed.With
As a example by this but it is not limited to：Computer-readable medium can include random access memory (Random Access Memory,
RAM), read-only storage (Read-Only Memory, ROM), EEPROM (Electrically
Erasable Programmable Read-Only Memory, EEPROM), read-only optical disc (Compact Disc Read-
Only Memory, CD-ROM) or other optical disc storages, magnetic disk storage medium or other magnetic storage apparatus or can be used in
Carry or storage have instruction or data structure form desired program code and can by computer access any other
Medium.In addition.Any connection can be appropriate as computer-readable medium.If for example, software is to use coaxial cable, light
Fine optical cable, twisted-pair feeder, Digital Subscriber Line (Digital Subscriber Line, DSL) or such as infrared ray, radio and
The wireless technology of microwave etc is transmitted from website, server or other remote sources, then coaxial cable, optical fiber cable, double
The wireless technology of twisted wire, DSL or such as infrared ray, wireless and microwave etc be included in affiliated medium it is fixing in.Such as this hair
It is bright used, disk (Disk) and dish (disc) include compression laser disc (CD), laser disc, laser disc, Digital Versatile Disc (DVD),
Floppy disk and Blu-ray Disc, the replicate data of the usual magnetic of which disk, and dish is then with laser come optical replicate data.Group above
Conjunction should also be as being included within the protection domain of computer-readable medium.
In a word, the preferred embodiment of technical solution of the present invention is the foregoing is only, is not intended to limit of the invention
Protection domain.All any modification, equivalent substitution and improvements within the spirit and principles in the present invention, made etc., should be included in
Within protection scope of the present invention.
Claims (8)
1. the frequency modulation(PFM) radiating circuit of a kind of terminal device, it is characterised in that including：Power module and the power module
The frequency modulation(PFM) and pre-amplification module and impedance matching mould of the power amplifier module of connection and power amplifier module connection
Block and the antenna of impedance matching module connection, the frequency modulation(PFM) and pre-amplification module are also connected with the terminal device
Master controller and audio-frequency module；
The power module is used to be powered to the power amplifier module；
The frequency modulation(PFM) and pre-amplification module are used for the first control instruction according to the master controller, by the audio-frequency module
The audio signal of output carries out frequency modulation(PFM) and carries out signal pre-amplification, exports to the power amplifier module；
The audio signal for carrying out frequency modulation(PFM) and carrying out after signal pre-amplification that the power amplifier module is used to receive is entered
Row power amplification, output to the impedance matching module；
The impedance matching module is used to that impedance matching will to be carried out through the audio signal of power amplification, launches through the antenna
Go.
2. the frequency modulation(PFM) radiating circuit of terminal device as claimed in claim 1, it is characterised in that the power module includes
Power supply and the power switching module being connected with the master controller, the power supply, the power amplifier module；
The power switching module is used for the second control instruction according to the master controller, the control connection power supply or disconnection
With the connection of the power supply.
3. the frequency modulation(PFM) radiating circuit of terminal device as claimed in claim 2, it is characterised in that the power module is also wrapped
Include the boost module being connected with the power switching module, the power amplifier module；
The boost module is used to be boosted the power supply.
4. the frequency modulation(PFM) radiating circuit of the terminal device as described in any one of claims 1 to 3, it is characterised in that also include
Connect the filtration module of the frequency modulation(PFM) and pre-amplification module and the power amplifier module；
The filtration module is used to be filtered the audio signal for carrying out frequency modulation(PFM) and carrying out after signal pre-amplification.
5. the frequency modulation(PFM) radiating circuit of terminal device as claimed in claim 1, it is characterised in that the impedance matching module
It is double pi types matching modules.
6. the frequency modulation(PFM) radiating circuit of the terminal device as described in any one of claims 1 to 3, it is characterised in that it is described enter
The scope of line frequency modulation is 87.5~108MHZ.
7. a kind of terminal device, it is characterised in that including master controller, connect audio-frequency module, the Yi Jilian of the master controller
Connect the frequency modulation(PFM) radiating circuit as described in any one of claim 1~6 of the master controller and the audio-frequency module；
The frequency modulation(PFM) radiating circuit is used for the first control command according to the master controller, by audio-frequency module output
Audio signal carry out frequency modulation(PFM) after launch.
8. terminal device as claimed in claim 7, it is characterised in that the frequency modulation(PFM) radiating circuit will be specifically for will be described
The audio signal of output is carried out being transmitted to vehicle-mounted multimedia equipment after frequency modulation(PFM) and played out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611169212.8A CN106788490A (en) | 2016-12-16 | 2016-12-16 | The frequency modulation(PFM) radiating circuit and terminal device of a kind of terminal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611169212.8A CN106788490A (en) | 2016-12-16 | 2016-12-16 | The frequency modulation(PFM) radiating circuit and terminal device of a kind of terminal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106788490A true CN106788490A (en) | 2017-05-31 |
Family
ID=58893336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611169212.8A Pending CN106788490A (en) | 2016-12-16 | 2016-12-16 | The frequency modulation(PFM) radiating circuit and terminal device of a kind of terminal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106788490A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110113064A (en) * | 2019-04-03 | 2019-08-09 | 上海船舶电子设备研究所(中国船舶重工集团公司第七二六研究所) | The adjustable transmitter of output power |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101383624A (en) * | 2007-09-07 | 2009-03-11 | 宁波萨基姆波导研发有限公司 | Mobile phone having FM transceiving function and implementation method thereof |
| CN203368447U (en) * | 2013-06-21 | 2013-12-25 | 威立达数码科技(深圳)有限公司 | Vehicle-mounted frequency modulation carrier wireless device |
| CN106027081A (en) * | 2016-06-29 | 2016-10-12 | 广西大学 | Full-band intelligent and adjustable FM transmitter |
-
2016
- 2016-12-16 CN CN201611169212.8A patent/CN106788490A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101383624A (en) * | 2007-09-07 | 2009-03-11 | 宁波萨基姆波导研发有限公司 | Mobile phone having FM transceiving function and implementation method thereof |
| CN203368447U (en) * | 2013-06-21 | 2013-12-25 | 威立达数码科技(深圳)有限公司 | Vehicle-mounted frequency modulation carrier wireless device |
| CN106027081A (en) * | 2016-06-29 | 2016-10-12 | 广西大学 | Full-band intelligent and adjustable FM transmitter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110113064A (en) * | 2019-04-03 | 2019-08-09 | 上海船舶电子设备研究所(中国船舶重工集团公司第七二六研究所) | The adjustable transmitter of output power |
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Application publication date: 20170531 |
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