CN2794045Y - Radio freuency-modulation stereophonic transmissioner - Google Patents
Radio freuency-modulation stereophonic transmissioner Download PDFInfo
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- CN2794045Y CN2794045Y CN 200520034527 CN200520034527U CN2794045Y CN 2794045 Y CN2794045 Y CN 2794045Y CN 200520034527 CN200520034527 CN 200520034527 CN 200520034527 U CN200520034527 U CN 200520034527U CN 2794045 Y CN2794045 Y CN 2794045Y
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- circuit
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- modulation
- intermediate frequency
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Abstract
The utility model discloses a wireless freuency modulation stereo transmitting device which comprises a transmitting device and a receiving device. The utility model realizes the wireless transmission function of audio signals between AV devices by using the wireless frequency modulation technology, and has the advantages of mature technology and low cost. The connection between domestic AV devices can be reduced or removed by using the device, therefore problems that beautiful appearance of an application environment is influenced by wiring connection and much inconvenience is brought to users by wiring connection are avoided, and problems that audio wires for wire connection age and damage, etc. do not exist, so that audio devices can be put freely by the users.
Description
[technical field]
The present invention relates to a kind of radio transmitting device.
[background technology]
Along with growth in the living standard, people also improve constantly the requirement of music appreciating, and the sound field of normal stereo can not satisfy the demands of consumers.Three-dimensional, around, the sound field pattern in space has been fashionable in generation.In order to reproduce sound field truly as far as possible, TV, audio playback device all develop to the multichannel direction.Connecting line between the articulatory system of equipment becomes the worried problem of consumer, for example in the household audio and video system of 5.1 sound channels, the surrounding sound speaker of two postposition need be installed on program appreciator's back, generally is that sofa is behind by the position of wall, the wiring of rearmounted audio amplifier need be crossed over whole parlor, unless buried pipeline in advance underground when decorating house, otherwise will be difficult to arrange wiring, open-wire line had both influenced the attractive in appearance of parlor greatly, can cause a lot of inconvenience again, also impaired easily.So the radio transmitting method that occurs in the prior art is widely used in multi-channel audio equipment.But its general 802.11 communications protocol and Bluetooth technology of adopting realizing all comparing costliness on the cost, therefore is difficult to apply.
[summary of the invention]
The purpose of this utility model: provide that a kind of cost is low, technology maturation, the wireless frequency modulation stereo transmission device easily realized.
For achieving the above object, the utility model proposes a kind of emitter of wireless frequency modulation stereo transmission device, comprise MPX circuit, pilot signal modulation circuit, modulator, radiating circuit, pilot oscillator, carrier-frequency oscilaltor, described MPX circuit is provided with the input that is used to connect stereo signal source, its output connects described pilot signal modulation circuit, described pilot signal modulation circuit also is connected with described pilot oscillator, modulator respectively, and described modulator also is connected with described carrier-frequency oscilaltor, radiating circuit respectively.A kind of receiving system of wireless frequency modulation stereo transmission device, comprise voltage-controlled reception resonant circuit, mixting circuit, intermediate frequency amplifier circuit, the frequency discrimination output circuit, Voltage-Controlled oscillation circuit, the AFC circuit, squelch circuit, described voltage-controlled reception resonant circuit is connected with described mixting circuit, described mixting circuit also respectively with described intermediate frequency amplifier circuit, Voltage-Controlled oscillation circuit connects, described AFC circuit respectively with described Voltage-Controlled oscillation circuit, intermediate frequency amplifier circuit connects, described squelch circuit is connected with described intermediate frequency amplifier circuit, and described intermediate frequency amplifier circuit also is connected with described frequency discrimination output circuit.
Owing to adopted above scheme, utilize the wireless transmission function of audio signal between the wireless frequency modulation technology realization AV equipment, technology maturation, with low cost.Use this device to reduce or need not the AV of family equipment between tone frequency channel wire connect, having avoided wiring to connect influencing environment for use attractive in appearance, cause user's inconvenience, do not have the problems such as aged deterioration of wired connection tone frequency channel wire yet; Make the user can indiscriminately ad. as one wishes put stereo set.
This device carrier frequency frequency is controlled with voltage-controlled mode, guarantees that transmitted frequency is accurate; The compensation of AFC automatic frequency control circuit is arranged, and operating frequency is reliable and stable; The FM pilot signal of employing standard has better separating degree; Effective propagation path 10-12 rice satisfies the instructions for use of consumer family.
[description of drawings]
Also the present invention is described in further detail in conjunction with the accompanying drawings below by specific embodiment.
Fig. 1 is a kind of schematic block circuit diagram of wireless frequency modulation stereo transmission device emitter.
Fig. 2 is a kind of schematic block circuit diagram of wireless frequency modulation stereo transmission device receiving system.
[embodiment]
As shown in Figure 1, the emitter of this device comprises MPX filter circuit, pilot signal modulation circuit, modulator, radiating circuit, pilot oscillator, carrier-frequency oscilaltor, the MPX filter circuit is provided with the input that is used to connect stereo signal source, its output connects the pilot signal modulation circuit, the pilot signal modulation circuit also is connected with pilot oscillator, modulator respectively, and modulator also is connected with carrier-frequency oscilaltor, radiating circuit respectively.Time decoding is used in order to transmit the left and right acoustic channels stereophonic signal simultaneously for the pilot signal oscillator.
As shown in Figure 2, the receiving system of this device comprises voltage-controlled reception resonant circuit, mixting circuit, intermediate frequency amplifier circuit, frequency discrimination output circuit, Voltage-Controlled oscillation circuit, AFC automatic frequency control circuit, squelch circuit, voltage-controlled reception resonant circuit is connected with mixting circuit, mixting circuit also is connected with intermediate frequency amplifier circuit, Voltage-Controlled oscillation circuit respectively, the AFC automatic frequency control circuit is connected with Voltage-Controlled oscillation circuit, intermediate frequency amplifier circuit respectively, squelch circuit is connected with intermediate frequency amplifier circuit, and intermediate frequency amplifier circuit also is connected with the frequency discrimination output circuit.Circuit noise elimination function when squelch circuit is the no signal reception.
Transmission and receiving unit independent design, installation, debugging.Transmitted frequency can be selected arbitrarily in (5 * 2) plant frequency, and receive frequency is debugged selected with voltage-controlled mode.The Primary Component of circuit is selected high precision components for use, guarantees stable, reliable, the effectively transmission of device.
This device is mainly used in the two paths of signals that transmits different attribute simultaneously.As a back left side of transmitting 5.1 sound channels simultaneously, the back is right or transmit a preceding left side, preceding right signal simultaneously.Because general design is a preceding left side, the preceding right side, the mid-wired connection of using forwardly, a left side, back, the right two-way in back are with wireless, and a cover gets final product (one two receipts).Loud speaker will be with active, and two sound channels are overlapped with one.If 6 sound channels all with wireless transmission that will be with 3 covers, at this moment, home theater AV system just can be completely free of the limitation of wiring, loud speaker can be put arbitrarily.
Only with the emitter of this device, input connects the stereophonic signal input of other AV equipment, and frequency is selected 5 in 88-108MHz for use, is received by the existing sound system of user (the FM function of radio receiver is arranged) and plays.
The receiving system of this device is similar with the wireless principle of FM, still, is the voltage-controlled frequency of deciding.Frequency has two kinds of selections: as select 5 frequencies in the 88-108MHz for use, and then can directly utilize the FM of existing sound equipment to receive, and need not be equipped with in addition; As select 5 frequencies below the 88MHz for use, then need receiving system of the present utility model to receive.
Claims (2)
1, a kind of emitter of wireless frequency modulation stereo transmission device, it is characterized in that: comprise MPX circuit, pilot signal modulation circuit, modulator, radiating circuit, pilot oscillator, carrier-frequency oscilaltor, described MPX circuit is provided with the input that is used to connect stereo signal source, its output connects described pilot signal modulation circuit, described pilot signal modulation circuit also is connected with described pilot oscillator, modulator respectively, and described modulator also is connected with described carrier-frequency oscilaltor, radiating circuit respectively.
2, a kind of receiving system of wireless frequency modulation stereo transmission device, it is characterized in that: comprise voltage-controlled reception resonant circuit, mixting circuit, intermediate frequency amplifier circuit, the frequency discrimination output circuit, Voltage-Controlled oscillation circuit, the AFC circuit, squelch circuit, described voltage-controlled reception resonant circuit is connected with described mixting circuit, described mixting circuit also respectively with described intermediate frequency amplifier circuit, Voltage-Controlled oscillation circuit connects, described AFC circuit respectively with described Voltage-Controlled oscillation circuit, intermediate frequency amplifier circuit connects, described squelch circuit is connected with described intermediate frequency amplifier circuit, and described intermediate frequency amplifier circuit also is connected with described frequency discrimination output circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520034527 CN2794045Y (en) | 2005-06-13 | 2005-06-13 | Radio freuency-modulation stereophonic transmissioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520034527 CN2794045Y (en) | 2005-06-13 | 2005-06-13 | Radio freuency-modulation stereophonic transmissioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2794045Y true CN2794045Y (en) | 2006-07-05 |
Family
ID=36821182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520034527 Expired - Lifetime CN2794045Y (en) | 2005-06-13 | 2005-06-13 | Radio freuency-modulation stereophonic transmissioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2794045Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106973363A (en) * | 2017-04-28 | 2017-07-21 | 生迪智慧科技有限公司 | Audio play control method, system and the sound box lamp of sound box lamp |
-
2005
- 2005-06-13 CN CN 200520034527 patent/CN2794045Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106973363A (en) * | 2017-04-28 | 2017-07-21 | 生迪智慧科技有限公司 | Audio play control method, system and the sound box lamp of sound box lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SKYWORTH DIGITAL TECHNOLOGY (SHENZHEN) CO. Free format text: FORMER OWNER: SHENZHEN SKYWORTH-RGB ELECTRONIC CO., LTD. Effective date: 20070720 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20070720 Address after: 518057 Guangdong city of Shenzhen province Nanshan District Gao Xin Road SKYWORTH tower A 14 floor Patentee after: Shenzhen Skyworth RGB Electronic Co., Ltd. Address before: 518057 Guangdong city of Shenzhen province Nanshan District Gao Xin Road SKYWORTH building A13-16 Patentee before: Shenzhen Skyworth-RGB Electronics Co., Ltd. |
|
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN SKYWORTH DIGITAL TECHNOLOGY CO. Free format text: FORMER NAME OR ADDRESS: SKYWORTH DIGITAL TECHNOLOGY (SHENZHEN) CO. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Guangdong city of Shenzhen province Nanshan District Gao Xin Road SKYWORTH building A, 14 floor, zip code: 518057 Patentee after: Shenzhen Skyworth Digital Technology Co., Ltd. Address before: Guangdong city of Shenzhen province Nanshan District Gao Xin Road SKYWORTH building A, 14 floor, zip code: 518057 Patentee before: Shenzhen Skyworth RGB Electronic Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150613 Granted publication date: 20060705 |