CN105471450B - A kind of FM emission systems - Google Patents
A kind of FM emission systems Download PDFInfo
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- CN105471450B CN105471450B CN201510904247.0A CN201510904247A CN105471450B CN 105471450 B CN105471450 B CN 105471450B CN 201510904247 A CN201510904247 A CN 201510904247A CN 105471450 B CN105471450 B CN 105471450B
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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
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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
- H04B2001/0408—Circuits with power amplifiers
- H04B2001/0416—Circuits with power amplifiers having gain or transmission power control
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Abstract
The invention discloses a kind of FM emission systems, the first audio signal generates the first baseband signal；Second audio signal generates the second baseband signal；First baseband signal and the second baseband signal are inputted to digital circuit blocks；Digital circuit blocks generate high frequency carrier according to the first baseband signal and the second modulates baseband signals voltage controlled oscillator；High frequency carrier generates modulating FM signal after power amplifier amplifies；Wherein, when the mode selection input ground connection of digital circuit blocks, FM emission systems are used cooperatively with MCU, and when the mode selection input of digital circuit blocks connects high level, FM emission systems are used alone.Above-mentioned FM emission systems can also meet the demand of the application scenarios of low-power consumption while suitable for the application scenarios of high power consumption, and market application is more extensive.
Description
Technical field
The present invention relates to technical field of radio, is to be related to a kind of FM emission systems in particular.
Background technology
With the popularization of multimedia technology, network widely uses, and such as receives traditional FM of station broadcast
The application market of (frequency modulation, frequency modulation) emission system is in gradual atrophy, and such as intercommunication, monitors, toy, religion
The application market of the unconventional FM emission systems of etc. slowly starts to turn into main flow.Width transmitting frequency range, low cost, reliably
Property is the trend of future development.
But current FM emission systems, it is necessary to coordinate micro-control unit (Microcontroller Unit, MCU) to make
While rise with, cost, due also to MCU power consumption is larger, causes current FM emission system power consumptions larger, be not suitable for low
Power consumption scene,
Therefore, how to realize that a kind of FM emission systems of low power consumption and low cost are urgently to be resolved hurrily as those skilled in the art
Problem.
The content of the invention
In view of this, the invention provides a kind of FM emission systems, with overcome FM emission systems of the prior art due to
Cost is high caused by must being used cooperatively with MCU, the big technical problem of power consumption.
To achieve the above object, the present invention provides following technical scheme：
A kind of FM emission systems, the system include：
Left channel audio signal input, the first programmable gain amplifier, the first analog-digital converter, right audio channel letter
Number input, the second programmable gain amplifier, the second analog-digital converter, digital circuit blocks, voltage controlled oscillator and power
Amplifier；
Wherein, the first audio signal is inputted to first programmable-gain by the left channel audio signal input
After amplifier is amplified, continue to generate the first baseband signal after inputting the first analog-digital converter progress analog-to-digital conversion；
Second audio signal is inputted to second programmable automation controller by the right channel audio signal input
After device is amplified, continue to generate the second baseband signal after inputting the second analog-digital converter progress analog-to-digital conversion；
First baseband signal and second baseband signal are inputted to the digital circuit blocks；
The digital circuit blocks are voltage-controlled according to first baseband signal and second modulates baseband signals to shake
Swing device generation high frequency carrier；
The high frequency carrier generates modulating FM signal after power amplifier amplification；
Wherein, when the mode selection input ground connection of the digital circuit blocks, the FM emission systems are in first
Pattern；When the mode selection input of the digital circuit blocks connects high level, the FM emission systems are in second mode；
The first mode is that the FM emission systems are used cooperatively with micro-control unit MCU, and the second mode is launched for the FM
System is used alone.
Preferably, the system also includes the first frequency divider；
Wherein, the high frequency carrier generates frequency modulation after power amplifier amplifies again after inputting first frequency divider
FM signals.
Preferably, the system also includes：
Voltage-stablizer；
Wherein, the voltage-stablizer is used for the voltage for stablizing the FM emission systems.
Preferably, the system also includes the I2C buses being connected with the digital circuit blocks, and the I2C buses include
Serial data line SDA and serial time clock line SCK；
Wherein, when the FM emission systems are in second mode, the SDA connects outside adjustable resistance, and the SCK connects
Ground.
Preferably, the system also includes：Second frequency divider, frequency discriminator module and low pass filter；
Wherein, the output end of the voltage controlled oscillator connects input, second frequency divider of second frequency divider
Output end connect the first input end of the frequency discriminator module, the output end of the frequency discriminator module connects the LPF
The input of device, the output end of the low pass filter connect the input formation phaselocked loop of the voltage controlled oscillator.
Preferably, the system also includes：Crystal oscillator；
Wherein, the crystal oscillator frequency of the crystal oscillator output is inputted to the second input of the frequency discriminator module.
Understood via above-mentioned technical scheme, compared with prior art, the invention discloses a kind of FM emission systems, first
Audio signal continues to input after left channel audio signal input is inputted to the first programmable gain amplifier and is amplified
First analog-digital converter generates the first baseband signal after carrying out analog-to-digital conversion；Second audio signal is defeated by right channel audio signal
Enter after holding input to be amplified to the second programmable gain amplifier, continue after inputting the second analog-digital converter progress analog-to-digital conversion
Generate the second baseband signal；First baseband signal and the second baseband signal are inputted to digital circuit blocks；Digital circuit blocks root
According to the first baseband signal and the second modulates baseband signals voltage controlled oscillator generation high frequency carrier；High frequency carrier passes through power amplifier
Modulating FM signal is generated after amplification；Wherein, when digital circuit blocks mode selection input ground connection when, FM emission systems with
MCU is used cooperatively, and when the mode selection input of digital circuit blocks connects high level, FM emission systems are used alone.It is above-mentioned
FM emission systems can also meet the demand of the application scenarios of low-power consumption while suitable for the application scenarios of high power consumption, and market should
With more extensive.
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
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is a kind of concrete structure schematic diagram of FM emission systems embodiment 1 disclosed in the embodiment of the present invention；
Fig. 2 is a kind of concrete structure schematic diagram of FM emission systems embodiment 2 disclosed in the embodiment of the present invention；
Fig. 3 is a kind of pin distribution schematic diagram of FM chips disclosed in the embodiment of the present invention；
Fig. 4 is the application scenarios schematic diagram that a kind of FM chips disclosed in the embodiment of the present invention enter MCU patterns；
Fig. 5 is that a kind of FM chips enter the application scenarios schematic diagram for exempting from MCU patterns disclosed in the embodiment of the present invention.
Embodiment
For the sake of quoting and understanding, the explanation of the technical term hereinafter used, write a Chinese character in simplified form or abridge and be summarized as follows：
FM, frequency modulation, frequency modulation；
MCU, Microcontroller Unit, micro-control unit；
LCH, Left Channel, L channel；
RCH, Right Channel, R channel；
PGA, Programmable Gain Amplifier, programmable gain amplifier；
ADC, Analog-to-Digital Converter, analog-digital converter；
VCO, Voltage-Controlled Oscillator, voltage controlled oscillator；
LPF, Low Pass Filter, low pass filter；
Crystal, crystal oscillator；
Regulator, voltage-stablizer；
PA, Power Amplifier, power amplifier；
PLL, Phase Locked Loop, phaselocked loop；
FD, frequency detector, frequency discriminator module；
The serial data line of SDA, Serial Data, I2C bus；
The serial time clock line of SCK, I2C bus.
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 describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Term " first ", " second " in description and claims of this specification and above-mentioned accompanying drawing etc. are to be used to distinguish
Similar object, without for describing specific order or precedence.It should be appreciated that the term so used is in appropriate feelings
It can be exchanged under condition, this is only to describe object used differentiation in description in embodiments of the invention to same alike result
Mode.In addition, term " comprising " and " having " and their any deformation, it is intended that cover it is non-exclusive include, so as to
Process, method, system, product or equipment comprising a series of units are not necessarily limited to those units, but may include unclear
Other units that ground is listed or for these processes, method, product or equipment inherently.
From background technology, FM emission systems of the prior art, cause cost due to that must be used cooperatively with MCU
Height, the big technical problem of power consumption.
Therefore, this application discloses a kind of FM emission systems, the first audio signal passes through left channel audio signal input
After input is amplified to the first programmable gain amplifier, continue to generate after inputting the first analog-digital converter progress analog-to-digital conversion
First baseband signal；Second audio signal inputs to the second programmable gain amplifier by right channel audio signal input
After row amplification, continue to generate the second baseband signal after inputting the second analog-digital converter progress analog-to-digital conversion；First baseband signal and
Second baseband signal is inputted to digital circuit blocks；Digital circuit blocks are according to the first baseband signal and the second modulates baseband signals
Voltage controlled oscillator generates high frequency carrier；High frequency carrier generates modulating FM signal after power amplifier amplifies；Wherein, numeral is worked as
During the mode selection input ground connection of circuit module, FM emission systems are used cooperatively with MCU, when the pattern of digital circuit blocks is selected
When selecting input termination high level, FM emission systems are used alone.Above-mentioned FM emission systems are in the application scenarios suitable for high power consumption
While can also meet low-power consumption application scenarios demand, market application is more extensive.
In order to facilitate the understanding of the purposes, features and advantages of the present invention, it is below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is further detailed explanation.
Accompanying drawing 1 is referred to, is a kind of concrete structure schematic diagram of FM emission systems embodiment 1 disclosed by the invention, the FM
Emission system includes：
Left channel audio signal input LCH, the first programmable gain amplifier PGA, the first analog-digital converter ADC, the right side
Channel audio signal input RCH, the second programmable gain amplifier PGA, the second analog-digital converter ADC, digital circuit blocks
Digital, voltage controlled oscillator VCO and power amplifier PA；
Wherein, the first audio signal is inputted to described first by the left channel audio signal input LCH and may be programmed
After gain amplifier PGA is amplified, continue to generate the first base after inputting the first analog-digital converter ADC progress analog-to-digital conversion
Band signal；
Second audio signal is inputted to second programmable-gain by the right channel audio signal input RCH and put
After big device PGA is amplified, continue to generate the second base band letter after inputting the second analog-digital converter ADC progress analog-to-digital conversion
Number；
First baseband signal and second baseband signal are inputted to the digital circuit blocks digital；
The digital circuit blocks digital is according to first baseband signal and second modulates baseband signals
Voltage controlled oscillator VCO generates high frequency carrier；
The high frequency carrier generates modulating FM signal via RFOUT interface Transmissions after power amplifier PA amplifications
Go out；
Wherein, when the mode selection input SEL ground connection of the digital circuit blocks digital, the FM transmittings system
System is in first mode；When the level input SEL of the digital circuit blocks digital connects high level, the FM transmittings
System is in second mode；The first mode is that the FM emission systems are used cooperatively with micro-control unit MCU, described second
Pattern is used alone for the FM emission systems.
A kind of FM emission systems disclosed in the present embodiment, the first audio signal input by left channel audio signal input
After being amplified to the first programmable gain amplifier, continue to generate first after inputting the first analog-digital converter progress analog-to-digital conversion
Baseband signal；Second audio signal is inputted to the second programmable gain amplifier by right channel audio signal input and put
After big, continue to generate the second baseband signal after inputting the second analog-digital converter progress analog-to-digital conversion；First baseband signal and second
Baseband signal is inputted to digital circuit blocks；Digital circuit blocks are voltage-controlled according to the first baseband signal and the second modulates baseband signals
Oscillator generates high frequency carrier；High frequency carrier generates modulating FM signal after power amplifier amplifies；Wherein, digital circuit is worked as
During the mode selection input ground connection of module, FM emission systems are used cooperatively with MCU, when the model selection of digital circuit blocks is defeated
When entering to terminate high level, FM emission systems are used alone.That is, above-mentioned FM emission systems are in the application suitable for high power consumption
Also the demand of the application scenarios of low-power consumption can be met while scene, market application is more extensive.
Accompanying drawing 2 is referred to, is a kind of concrete structure schematic diagram of FM emission systems embodiment 2 disclosed by the invention, except
Outside concrete structure in embodiment 1, the FM emission systems also include：
First frequency divider M, voltage-stablizer regulator, the I2C buses being connected with the digital circuit blocks, the I2C are total
Line includes serial data line SDA and serial time clock line SCK, crystal oscillator crystal, the second frequency divider N, frequency discriminator module FD and low
Bandpass filter LPF；
Wherein, the high frequency carrier is inputted after the first frequency divider M and generated again after power amplifier PA amplifications
Modulating FM signal.
The voltage-stablizer regulator mono- terminates power vd D, other end ground connection GND, for stablizing the FM emission systems
Voltage.
The output end of the voltage controlled oscillator VCO connects input, the second frequency divider N of the second frequency divider N
Output end connect the first input end of the frequency discriminator module FD, the output end of the frequency discriminator module FD connects the low pass
Wave filter LPF input, the input of the output end connection voltage controlled oscillator VCO of the low pass filter LPF are formed
Phase-locked loop pll.
The crystal oscillator frequency of the crystal oscillator crystal outputs is inputted to the second input of the frequency discriminator module FD, so that
The frequency and the frequency discriminator of crystal oscillator frequency that the frequency discriminator module FD calculating VCO is fed back.In addition, the crystal oscillator crystal
Two input interfaces of also XI and XO.
It should be noted that when the FM emission systems are in second mode, the SDA meets outside adjustable resistance, institute
State SCK ground connection.
For convenience of use, FM emission systems disclosed in the present embodiment 2 can be integrated into a chip, the pin point of the chip
Cloth is specific as shown in figure 3, the pin of the chip is defined as follows：
VDD is power pins；
GND is grounding pin；
XI and XO is crystal oscillator input；
LCH, RCH are respectively the source of sound input pin of left and right acoustic channels, can input the first audio signal and the second audio signal；
SEL is chip mode selection pin, corresponds to digital circuit blocks digital mode selection input, and SEL connects
Ground, the chip enter MCU patterns (corresponding above-mentioned first mode)；SEL connects high level, and the chip is (right into MCU patterns are exempted from
Answer above-mentioned second mode)；
SDA, SCK are multiplexing pins, and the interface under MCU patterns as 12C, SDA is data wire, and SCK is clock line；Exempt from
Under MCU patterns, SDA connects outside adjustable resistance, SCK ground connection.
This chip connects varying level using SEL and still exempts from MCU patterns to differentiate into MCU patterns.SDA, SCK the two
I2C pin multiplexings are the concrete application scene of the pin of MCU patterns as shown in figure 4, now, MCU is carried out by I2C to the chip
Register configuration.Under MCU patterns, SDA/SCK moves VDD, MCU control launch times, tranmitting frequency to by the resistance in I2C buses
Etc. information, generally now audio with stereo.
The two I2C pin multiplexings of SDA, SCK are the concrete application scene for the pin for exempting from MCU patterns as shown in figure 5, this
When, SCK is grounded, SDA adjusts platform by outer meeting resistance.Such as resistance value is changed to adjust platform in real time by toggle switch, connect
LED can indicate which channel be now operating in.As above illustrated example, exempt from that 8 platforms can be adjusted under MCU patterns, that is, send out
8 frequencies are penetrated, this meets many applications, such as intercommunication, game enough in fact, monitor etc..Now audio emission can use monophone
Road, it can further save power consumption.Here depending on the visual concrete application of plug-in resistance number and resistance.
It is specific as follows the invention discloses operation principle of the FM chips under MCU patterns based on shown in Fig. 4：
1st, SEL signal grounds are detected on chip after electricity, illustrate that now chip enters MCU patterns；
2nd, MCU is waited by I2C bus configuration chip internal registers, particular by SDA, SCK both threads.
3rd, after configuration register, chip obtains the systematic parameters such as FM objective emission frequencies, into emission mode.
It is specific as follows the invention discloses operation principle of the FM chips in the case where exempting from MCU patterns based on shown in Fig. 5：
1st, detect that SEL signals connect high level on chip after electricity, illustrate that now chip enters and exempt from MCU patterns；
2nd, now SCK is grounded, the plug-in different resistance of SDA adjusts platform, and different resistance values produces different signal electricity
Pressure；
3rd, SDA signal voltage is detected, reads the value for the register that chip internal prestores, configures systematic parameter；
4th, chip obtains the systematic parameters such as FM objective emission frequencies, into emission mode.
In summary：
This application discloses a kind of FM emission systems, the first audio signal by left channel audio signal input input to
After first programmable gain amplifier is amplified, continue to generate the first base after inputting the first analog-digital converter progress analog-to-digital conversion
Band signal；Second audio signal is inputted to the second programmable gain amplifier by right channel audio signal input and is amplified
Afterwards, continue to input after the second analog-digital converter carries out analog-to-digital conversion and generate the second baseband signal；First baseband signal and the second base
Band signal is inputted to digital circuit blocks；Digital circuit blocks are according to the first baseband signal and the second modulates baseband signals are voltage-controlled shakes
Swing device generation high frequency carrier；High frequency carrier generates modulating FM signal after power amplifier amplifies；Wherein, when digital circuit mould
During the mode selection input ground connection of block, FM emission systems are used cooperatively with MCU, when the model selection of digital circuit blocks inputs
When terminating high level, FM emission systems are used alone.Above-mentioned FM emission systems are while suitable for the application scenarios of high power consumption
Also the demand of the application scenarios of low-power consumption can be met, market application is more extensive.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.For device disclosed in embodiment
For, because it is corresponded to the method disclosed in Example, so description is fairly simple, related part is said referring to method part
It is bright.
It should be noted that, device embodiment described above is only schematical in addition, wherein described as separation
The unit of part description can be or may not be it is physically separate, can be as the part that unit is shown or
It can not be physical location, you can with positioned at a place, or can also be distributed on multiple NEs.Can be according to reality
Border needs to select some or all of module therein to realize the purpose of this embodiment scheme.It is in addition, provided by the invention
In device embodiment accompanying drawing, the annexation between module represents there is communication connection between them, specifically can be implemented as one
Bar or a plurality of communication bus or signal wire.Those of ordinary skill in the art are without creative efforts, you can with
Understand and implement.
Through the above description of the embodiments, it is apparent to those skilled in the art that the present invention can borrow
Software is helped to add the mode of required common hardware to realize, naturally it is also possible to include application specific integrated circuit, specially by specialized hardware
Realized with CPU, private memory, special components and parts etc..Generally, all functions of being completed by computer program can
Easily realized with corresponding hardware, moreover, for realizing that the particular hardware structure of same function can also be a variety of more
Sample, such as analog circuit, digital circuit or special circuit etc..But it is more for the purpose of the present invention in the case of software program it is real
It is now more preferably embodiment.Based on such understanding, technical scheme is substantially made to prior art in other words
The part of contribution can be embodied in the form of software product, and the computer software product is stored in the storage medium that can be read
In, such as the floppy disk of computer, USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only Memory), random access memory
Device (RAM, Random Access Memory), magnetic disc or CD etc., including some instructions are causing a computer to set
Standby (can be personal computer, server, or network equipment etc.) performs the method described in each embodiment of the present invention.
In summary, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to upper
Embodiment is stated the present invention is described in detail, it will be understood by those within the art that：It still can be to upper
State the technical scheme described in each embodiment to modify, or equivalent substitution is carried out to which part technical characteristic；And these
Modification is replaced, and the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (5)
1. a kind of FM emission systems, it is characterised in that the system includes：
Left channel audio signal input, the first programmable gain amplifier, the first analog-digital converter, right channel audio signal are defeated
Enter end, the second programmable gain amplifier, the second analog-digital converter, digital circuit blocks, voltage controlled oscillator and power amplification
Device；
Wherein, the first audio signal is inputted to first programmable automation controller by the left channel audio signal input
After device is amplified, continue to generate the first baseband signal after inputting the first analog-digital converter progress analog-to-digital conversion；
Second audio signal inputs to second programmable gain amplifier by the right channel audio signal input
After row amplification, continue to generate the second baseband signal after inputting the second analog-digital converter progress analog-to-digital conversion；
First baseband signal and second baseband signal are inputted to the digital circuit blocks；
Digital circuit blocks voltage controlled oscillator according to first baseband signal and second modulates baseband signals
Generate high frequency carrier；
The high frequency carrier generates modulating FM signal after power amplifier amplification；
Wherein, when the mode selection input ground connection of the digital circuit blocks, the FM emission systems are in first mode；
When the mode selection input of the digital circuit blocks connects high level, the FM emission systems are in second mode；It is described
First mode is that the FM emission systems are used cooperatively with micro-control unit MCU, and the second mode is the FM emission systems
It is used alone；
The system also includes the I2C buses being connected with the digital circuit blocks, and the I2C buses include serial data line
SDA and serial time clock line SCK；
Wherein, when the FM emission systems are in first mode, the SDA is data wire, and the SCK is clock line；Work as institute
When stating FM emission systems and being in second mode, the SDA connects outside adjustable resistance, the SCK ground connection.
2. FM emission systems according to claim 1, it is characterised in that the system also includes the first frequency divider；
Wherein, the high frequency carrier inputs generates modulating FM letter after power amplifier amplifies again after first frequency divider
Number.
3. FM emission systems according to claim 1, it is characterised in that the system also includes：Voltage-stablizer；
Wherein, the voltage-stablizer is used for the voltage for stablizing the FM emission systems.
4. the FM emission systems according to any one in claims 1 to 3, it is characterised in that the system also includes：The
Two-divider, frequency discriminator module and low pass filter；
Wherein, the output end of the voltage controlled oscillator connect the input of second frequency divider, second frequency divider it is defeated
Go out the first input end of the end connection frequency discriminator module, the output end of the frequency discriminator module connects the low pass filter
Input, the output end of the low pass filter connect the input formation phaselocked loop of the voltage controlled oscillator.
5. FM emission systems according to claim 4, it is characterised in that the system also includes：Crystal oscillator；
Wherein, the crystal oscillator frequency of the crystal oscillator output is inputted to the second input of the frequency discriminator module.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201011580Y (en) * | 2007-01-22 | 2008-01-23 | 刘寒冰 | Toy remote control emitter and receiver |
| CN201113982Y (en) * | 2007-09-28 | 2008-09-10 | 骆正伦 | USB wireless audio frequency emitting set |
| CN201130933Y (en) * | 2007-11-27 | 2008-10-08 | 蔡南星 | Wireless acoustic enclosure |
| CN101345538A (en) * | 2007-07-09 | 2009-01-14 | 晨星半导体股份有限公司 | Frequency modulation audio conversion device and method |
| CN201467349U (en) * | 2009-07-06 | 2010-05-12 | 湖州佳视电子设备有限公司 | Common-frequency inter cut frequency modulation device in CATV common cable transmission |
| CN101877588A (en) * | 2005-12-06 | 2010-11-03 | 罗姆股份有限公司 | Frequency modulator and the frequency modulation transtation mission circuit that uses it |
| CN104320188A (en) * | 2014-09-25 | 2015-01-28 | 北京广厦网络技术股份公司 | Stereo wireless transmission system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100654450B1 (en) * | 2005-02-03 | 2006-12-06 | 삼성전자주식회사 | Communication method operated by software and apparatus by the same |
| US8503929B2 (en) * | 2005-05-26 | 2013-08-06 | Broadcom Corporation | Method and system for routing FM data to a bluetooth enabled device via a bluetooth link |
-
2015
- 2015-12-09 CN CN201510904247.0A patent/CN105471450B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101877588A (en) * | 2005-12-06 | 2010-11-03 | 罗姆股份有限公司 | Frequency modulator and the frequency modulation transtation mission circuit that uses it |
| CN201011580Y (en) * | 2007-01-22 | 2008-01-23 | 刘寒冰 | Toy remote control emitter and receiver |
| CN101345538A (en) * | 2007-07-09 | 2009-01-14 | 晨星半导体股份有限公司 | Frequency modulation audio conversion device and method |
| CN201113982Y (en) * | 2007-09-28 | 2008-09-10 | 骆正伦 | USB wireless audio frequency emitting set |
| CN201130933Y (en) * | 2007-11-27 | 2008-10-08 | 蔡南星 | Wireless acoustic enclosure |
| CN201467349U (en) * | 2009-07-06 | 2010-05-12 | 湖州佳视电子设备有限公司 | Common-frequency inter cut frequency modulation device in CATV common cable transmission |
| CN104320188A (en) * | 2014-09-25 | 2015-01-28 | 北京广厦网络技术股份公司 | Stereo wireless transmission system |
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| CN105471450A (en) | 2016-04-06 |
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