CN202374257U - Vehicle-mounted sound reception device based on IEEE (Institute of Electrical and Electronic Engineers) 802.11b - Google Patents
Vehicle-mounted sound reception device based on IEEE (Institute of Electrical and Electronic Engineers) 802.11b Download PDFInfo
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- CN202374257U CN202374257U CN 201120532841 CN201120532841U CN202374257U CN 202374257 U CN202374257 U CN 202374257U CN 201120532841 CN201120532841 CN 201120532841 CN 201120532841 U CN201120532841 U CN 201120532841U CN 202374257 U CN202374257 U CN 202374257U
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Abstract
The utility model provides a vehicle-mounted sound reception device based on IEEE (Institute of Electrical and Electronic Engineers) 802.11b. The vehicle-mounted sound reception device comprises a sound reception signal processing unit, a dynamic storage unit connected with the sound reception signal processing unit, a display unit connected with the sound reception signal processing unit, a sound reception signal digital to analogue conversion unit connected with the sound reception signal processing unit, a sound reception output unit connected with the sound reception signal processing unit through the sound reception signal digital to analogue conversion unit, an IEEE 802.11b unit connected with the sound reception signal processing unit through an interface unit, an antenna unit connected with the IEEE 802.11b unit, and a power supply management unit respectively connected with the IEEE 802.11b unit and the sound reception signal processing unit, wherein network radio station information can be totally received through the IEEE 802.11b unit. The vehicle-mounted sound reception device has the advantages of small interference, less distortion and wide cover area; and the high-quality vehicle-mounted wireless unicast or broadcast audio program replay is realized.
Description
Technical field
The utility model relates to a kind of vehicle-mounted audio signal reception device, relates in particular to a kind of vehicle-mounted audio signal reception device based on IEEE 802.11b.
Background technology
Existing vehicle-mounted audio signal reception device generally all is through the FM/AM antenna analog fm amplitude modulation radio set signal to be delivered to TUNER to handle; Then audio frequency is delivered to earphone or loudspeaker play back; To cause radio reception to be disturbed easily like this, the channel selection limited amount, and also its signal cover is smaller; Even also have the existing network sound receiving device of part to be based on the PC, but the network of its transmission is the IP cable network; Insert PC through RJ45 network interface card interface, then, radio station server is pushed to the audio stream medium on the PC through IP network; Decoding of use application program and audio player and channel selection are changed through sound card D/A then on the PC, audio frequency are delivered on loudspeaker or the earphone play back; But can not move, the scope of application is very limited, is not suitable for vehicle environment.
Summary of the invention
The utility model technical problem to be solved is need provide under a kind of mobile environment, the vehicle-mounted audio signal reception device that also be not subject to disturb, available quantity is big, signal cover is wide.
To this, the utility model provides a kind of vehicle-mounted audio signal reception device based on IEEE 802.11b, comprising:
The radio reception signal processing unit;
Dynamic storage cell is connected with said radio reception signal processing unit;
Display unit is connected with said radio reception signal processing unit;
Radio reception signal D/A conversion unit is connected with said radio reception signal processing unit;
The radio reception output unit is connected with said radio reception signal processing unit through radio reception signal D/A conversion unit;
IEEE 802.11b unit is connected with said radio reception signal processing unit through interface unit;
Antenna element is connected with said IEEE 802.11b unit; And,
PMU is connected with the radio reception signal processing unit with said IEEE 802.11b unit respectively.
Wherein, Said radio reception signal processing unit is connected with IEEE 802.11b unit through interface unit, and interface unit can adopt USB interface, also can adopt SPI interface or SDIO interface; Said SPI interface; Being Serial Peripheral Interface Serial Peripheral Interface (SPI), is a kind of synchronous serial Peripheral Interface, and radio reception signal processing unit and various ancillary equipment are communicated with exchange message with serial mode; Said SDIO interface is the expansion interface of SD type, and except can connecing the SD card, the equipment of support also has bluetooth, network interface card, Wi-Fi card and TV card etc. for total type; IEEE 802.11b promptly adopts the unit local area network (LAN) unit of IEEE wireless network standards; Said IEEE 802.11b unit provides wireless network to the radio reception signal processing unit, at OS, under the ICP/IP protocol support that promptly Operating system provides; Through application program subelement and audio player etc.; Be connected to radio station server, download network station list and information thereof, and adopt display unit to realize that network radio station channel selection and relevant information show; Said display unit can adopt LCD display to realize visualization display and channel selection operation support; The utility model is kept at the radio flow medium of radio station server in the dynamic storage cell, then through audio decoder decode, converts analog signal to through radio reception signal D/A conversion unit again and realizes radio reception output; User vehicle can be heard the broadcast program of network radio station easily and quickly, can trans-regionally listen to local broadcast programs.
Existing vehicle-mounted audio signal reception device generally uses the FM/AM antenna, and what transmission channel adopted is the wireless simulation channel; Tonequality is not very desirable; Disturbed easily, can supply the quantity of channel selection very limited, and signal cover is smaller; Especially in remote rural area, mountain area or other signals cover bad place, then can not receive signal probably; Also there is legacy network audio signal reception device based on PC; But but need the support of IP basic network, can not move and listen to, volume is big; In addition; The device temperature of PC own, concussion characteristic can not satisfy the requirement of auto industry level, and therefore under automotive environment, the network sound receiving device is not well used.
In automobile, wireless use is very general, and existing vehicle-mounted radio reception all is to adopt the AM/FM mode to obtain the radio reception program, transmission be that analog signal is play; But the radius of action of automobile is increasing, and the covering of AM/FM signal often has limitation, and especially, existing automobile speed is increasingly high, and under high speed or speed change condition, the effect of AM/FM radio reception will descend greatly, has a strong impact on the radio reception quality.
In view of this, it is a kind of under high speed or variable-speed operation that the utility model provides, and can play the vehicle-mounted audio signal reception device with playback radio reception program preferably.
The utility model adopts IEEE 802.11b unit to connect IEEE 802.11b network, and the radio reception signal processing unit is connected with IEEE 802.11b unit through interface unit, and interface unit can adopt USB interface; Also can adopt SPI interface or SDIO interface, download, receive the digital signal of network radio station, and adopt the relevant information of dynamic storage cell storage; IEEE 802.11b unit bandwidth is enough wide, and transmitted data on network is fast, correspondingly; Interface unit adopts USB interface, SPI interface or SDIO interface; The transmission data capacity is big, speed is fast, and feasible vehicle-mounted audio signal reception device audio frequency based on IEEE 802.11b is more smooth, and transmission of digital signals is not allowed to be subject to disturb; Tonequality is better, and signal cover is wide; Under the trans-regional high-speed cruising, also can listen to each regional broadcast program, also can receive smoothness, high-quality broadcast singal, realize online request or playback broadcast audio program even the location is remote rural area or mountain area.
The existing IEEE 802.11b wide network coverage, the utility model adopts technique scheme, and its scope of listening to the radio reception program will less receive its position effects, and speed is fast; Signal is not subject to disturb, and, to the stability problem that receives at a high speed; The utility model also is provided with antenna element especially, has further improved the listening quality of vehicle environment, said antenna element; Adopt the antenna of lengthening, particularly in high-speed mobile or automobile variable speed, strengthened the intensity that receives signal; Reduce distorted signals, realize high-quality wireless program request or playback broadcast audio program, trans-regionally also can listen to local broadcast programs.
Preferably, said radio reception signal processing unit adopts the CPU subelement, and said CPU subelement is connected with IEEE 802.11b unit through interface unit.
The utility model further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through IEEE 802.11b unit comprehensively; Disturb for a short time, distortion is few, and area coverage is wide; Realized high-quality onboard wireless program request or playback broadcast audio program, on this basis, said radio reception signal processing unit adopts the CPU subelement; Said CPU subelement has operating system, is connected with IEEE 802.11b unit through interface unit, can more fast and effeciently download the network radio station information that receives; Disposal ability is strong, and the upper strata audio decoder is used to strengthen audio decoder, also is convenient to realize better digital-to-analogue conversion and output.
Preferably, said antenna element is fixedly installed in behind the automobile on glass.
The utility model further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through IEEE 802.11b unit comprehensively, disturbs little; Distortion is few, and area coverage is wide, on this basis; Said antenna element is fixedly installed in behind the automobile on glass, adopts the antenna of lengthening, particularly in high-speed mobile or automobile variable speed; Strengthen the intensity that receives signal, reduced distorted signals, on glass after being attached to antenna simultaneously; Can effectively reduce the interference of concussion, realize high-quality wireless program request or playback broadcast audio program, trans-regionally also can listen to local broadcast programs signal.
Preferably, said dynamic storage cell adopts the DDR2 memory bar.
The utility model further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through IEEE 802.11b unit comprehensively, disturbs little; Distortion is few, and area coverage is wide, has realized high-quality onboard wireless program request or playback broadcast audio program; On this basis, said dynamic storage cell adopts the DDR2 memory bar, and the dynamic memory ability is strong; Audio frequency is more smooth, can either satisfy the dynamic memory demand of vehicle-mounted radio reception under the high-speed cruising, also can adapt to the demand of shaking characteristic.
Preferably, said DDR2 memory bar is the 1G memory bar.
The utility model further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through IEEE 802.11b unit comprehensively; Disturb for a short time, distortion is few, and area coverage is wide; Realized high-quality onboard wireless program request or playback broadcast audio program, on this basis, said dynamic storage cell adopts the DDR2 memory bar of 1G; Can satisfy the dynamic memory of vehicle-mounted radio reception under the high-speed cruising and the demand of concussion characteristic; Simultaneously, also avoided the height of a certain device of simple pursuit to dispose and the waste resource, rationally controlled cost.
Preferably, said radio reception output unit comprises the esd protection subelement.
Wherein, ESD is the abbreviation of Electro-Static discharge, and said esd protection subelement is the subelement that is used to realize electrostatic discharge protection.
The utility model further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through IEEE 802.11b unit comprehensively; Disturb for a short time, distortion is few, and area coverage is wide; Realized high-quality onboard wireless program request or playback broadcast audio program, on this basis, said radio reception output unit comprises the esd protection subelement; Before output, carry out electrostatic discharge protection and handle, guarantee the output of audio frequency reliable and stable ground, effectively get rid of the influence of static.
Preferably, said radio reception output unit also comprises the filtering interfering subelement.
The utility model further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through IEEE 802.11b unit comprehensively; Disturb for a short time, distortion is few, and area coverage is wide; High-quality onboard wireless program request or playback broadcast audio program have been realized; Carry out electrostatic discharge protection before the vehicle-mounted radio reception output and handle, on this basis, said radio reception output unit also comprises the filtering interfering subelement; The interference that the filtering audio-frequency information receives in processing procedure further guarantees the output of audio frequency reliable and stable ground.
Preferably, said filtering interfering subelement adopts 33pF electric capacity.
The utility model further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through IEEE 802.11b unit comprehensively; Disturb for a short time, distortion is few, and area coverage is wide; Realized high-quality onboard wireless program request or playback broadcast audio program, carried out electrostatic discharge protection before the vehicle-mounted radio reception output and handle, on this basis; Said radio reception output unit also comprises the filtering interfering subelement, and said filtering interfering subelement adopts 33pF electric capacity, adopts the effectively interference that in processing procedure, receives of filtering audio-frequency information of 33pF electric capacity; Avoid the sudden change and the interference of audio signal, further guarantee the output of audio frequency reliable and stable ground again.
The working temperature of the said radio reception signal processing unit of the utility model, dynamic storage cell, display unit, radio reception signal D/A conversion unit, radio reception output unit, IEEE 802.11b unit, antenna element and PMU is-20 degrees centigrade to 70 degrees centigrade; Be very suitable for the industrial temperature characteristic demand under the automotive environment; Vehicle-mounted efficiently audio signal reception device is provided, greatly reduces its failure rate.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment of the utility model;
Fig. 2 is that the network of the another kind of embodiment of the utility model connects sketch map;
Fig. 3 is the CPU subelement operation principle sketch map of the another kind of embodiment of the utility model.
Embodiment
Below in conjunction with accompanying drawing, the more excellent embodiment of the utility model is done further detailed description.
Embodiment 1:
As shown in Figure 1, this example provides a kind of vehicle-mounted audio signal reception device based on IEEE 802.11b, comprising:
The radio reception signal processing unit;
Dynamic storage cell is connected with said radio reception signal processing unit;
Display unit is connected with said radio reception signal processing unit;
Radio reception signal D/A conversion unit is connected with said radio reception signal processing unit;
The radio reception output unit is connected with said radio reception signal processing unit through radio reception signal D/A conversion unit;
IEEE 802.11b unit is connected with said radio reception signal processing unit through interface unit;
Antenna element is connected with said IEEE 802.11b unit; And,
PMU is connected with the radio reception signal processing unit with said IEEE 802.11b unit respectively.
Wherein, Said radio reception signal processing unit is connected with IEEE 802.11b unit through interface unit, and interface unit can adopt USB interface, also can adopt SPI interface or SDIO interface; Said SPI interface; Being Serial Peripheral Interface Serial Peripheral Interface (SPI), is a kind of synchronous serial Peripheral Interface, and radio reception signal processing unit and various ancillary equipment are communicated with exchange message with serial mode; Said SDIO interface is the expansion interface of SD type, and except can connecing the SD card, the equipment of support also has bluetooth, network interface card, Wi-Fi card and TV card etc. for total type; Said IEEE 802.11b unit provides wireless network to the radio reception signal processing unit, at OS, under the ICP/IP protocol support that promptly Operating system provides; Through application program subelement and audio player etc.; Be connected to radio station server, download network station list and information thereof, and adopt display unit to realize that network radio station channel selection and relevant information show; Said display unit can adopt LCD display to realize visualization display and channel selection operation support; This example is kept at the radio flow medium of radio station server in the dynamic storage cell, then through audio decoder decode, converts analog signal to through radio reception signal D/A conversion unit again and realizes radio reception output; User vehicle can be heard the broadcast program of network radio station easily and quickly, can trans-regionally listen to local broadcast programs.
Existing vehicle-mounted audio signal reception device generally uses the FM/AM antenna, and what transmission channel adopted is the wireless simulation channel; Tonequality is not very desirable; Disturbed easily, can supply the quantity of channel selection very limited, and signal cover is smaller; Especially in remote rural area, mountain area or other signals cover bad place, then can not receive signal probably; Also there is legacy network audio signal reception device based on PC; But but need the support of IP basic network, can not move and listen to, volume is big; In addition; The device temperature of PC own, concussion characteristic can not satisfy the requirement of auto industry level, and therefore under automotive environment, the network sound receiving device is not well used.
In automobile, wireless use is very general, and existing vehicle-mounted radio reception all is to adopt the AM/FM mode to obtain the radio reception program, transmission be that analog signal is play; But the radius of action of automobile is increasing, and the covering of AM/FM signal often has limitation, and especially, existing automobile speed is increasingly high, and under high speed or speed change condition, the effect of AM/FM radio reception will descend greatly, has a strong impact on the radio reception quality.
In view of this, it is a kind of under high speed or variable-speed operation that this example provides, and can play the vehicle-mounted audio signal reception device with playback radio reception program preferably.
As shown in Figure 2, this example adopts IEEE 802.11b unit to connect IEEE 802.11b network, and the radio reception signal processing unit is connected with IEEE 802.11b unit through interface unit; Interface unit can adopt USB interface, also can adopt SPI interface or SDIO interface, downloads, receives the digital signal of network radio station; And adopt the relevant information of dynamic storage cell storage, and IEEE 802.11b unit bandwidth is enough wide, and transmitted data on network is fast; Correspondingly, interface unit adopts USB interface, SPI interface or SDIO interface, and the transmission data capacity is big, speed is fast; Make based on the vehicle-mounted audio signal reception device audio frequency of IEEE 802.11b more smooth; Transmission of digital signals is not allowed to be subject to disturb, and tonequality is better, and signal cover is wide; Under the trans-regional high-speed cruising, also can listen to each regional broadcast program, also can receive smoothness, high-quality broadcast singal, realize online request or playback broadcast audio program even the location is remote rural area or mountain area.
The existing IEEE 802.11b wide network coverage, this example adopts technique scheme, and its scope of listening to the radio reception program will less receive its position effects, and speed is fast; Signal is not subject to disturb, and, to the stability problem that receives at a high speed; This example also is provided with antenna element especially, has further improved the listening quality of vehicle environment, said antenna element; Adopt the antenna of lengthening, particularly in high-speed mobile or automobile variable speed, strengthened the intensity that receives signal; Reduce distorted signals, realize high-quality wireless program request or playback broadcast audio program, trans-regionally also can listen to local broadcast programs.
The working temperature of this routine said radio reception signal processing unit, dynamic storage cell, display unit, radio reception signal D/A conversion unit, radio reception output unit, IEEE 802.11b unit, antenna element and PMU is-20 degrees centigrade to 70 degrees centigrade; Be very suitable for the industrial temperature characteristic demand under the automotive environment; Vehicle-mounted efficiently audio signal reception device is provided, greatly reduces its failure rate.
Embodiment 2:
Different with embodiment 1 is, this routine said radio reception signal processing unit adopts CPU subelement, and said CPU subelement is connected with IEEE 802.11b unit through interface unit.
As shown in Figure 3, said CPU subelement has operating system nucleus, and said LTE unit provides internet wireless network to the CPU subelement; At OS; Be under the ICP/IP protocol support that provides of Operating system,, be connected to radio station server through application program subelement and audio player etc.; Download network station list and information thereof; And adopt display unit to realize that network radio station channel selection and relevant information show that this example is kept at the radio flow medium of radio station server in the dynamic storage cell, passes through audio decoder decode then; Convert analog signal to through radio reception signal D/A conversion unit again and realize radio reception output; User vehicle can be heard the broadcast program of network radio station easily and quickly, and when interface unit adopted SPI interface or SDIO interface, USB interface shown in Fig. 3 drives also need correspondingly become the driving of SPI interface or SDIO interface.
This example further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through IEEE 802.11b unit comprehensively; Disturb for a short time, distortion is few, and area coverage is wide; Realized high-quality onboard wireless program request or playback broadcast audio program, on this basis, said radio reception signal processing unit adopts the CPU subelement; Said CPU subelement has operating system, is connected with IEEE 802.11b unit through interface unit, can more fast and effeciently download the network radio station information that receives; Disposal ability is strong, and the upper strata audio decoder is used to strengthen audio decoder, also is convenient to realize better digital-to-analogue conversion and output.
Embodiment 3:
Different with embodiment 1 is, this routine said antenna element is fixedly installed in behind the automobile on glass.
This example further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through IEEE 802.11b unit comprehensively, disturbs little; Distortion is few, and area coverage is wide, on this basis; Said antenna element is fixedly installed in behind the automobile on glass, adopts the antenna of lengthening, particularly in high-speed mobile or automobile variable speed; Strengthen the intensity that receives signal, reduced distorted signals, on glass after being attached to antenna simultaneously; Can effectively reduce the interference of concussion, realize high-quality wireless program request or playback broadcast audio program, trans-regionally also can listen to local broadcast programs signal.
This example also is applicable to embodiment 2 described vehicle-mounted audio signal reception devices based on IEEE 802.11b.
Embodiment 4:
Different with embodiment 1 is that this routine said dynamic storage cell adopts DDR2 memory bar.
This example further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through IEEE 802.11b unit comprehensively, disturbs little; Distortion is few, and area coverage is wide, has realized high-quality onboard wireless program request or playback broadcast audio program; On this basis, said dynamic storage cell adopts the DDR2 memory bar, and the dynamic memory ability is strong; Audio frequency is more smooth, can either satisfy the dynamic memory demand of vehicle-mounted radio reception under the high-speed cruising, also can adapt to the demand of shaking characteristic.
This example also is applicable to embodiment 2 or embodiment 3 described vehicle-mounted audio signal reception devices based on IEEE 802.11b.
Embodiment 5:
Different with embodiment 4 is that this routine said DDR2 memory bar is the 1G memory bar.
This example further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through IEEE 802.11b unit comprehensively; Disturb for a short time, distortion is few, and area coverage is wide; Realized high-quality onboard wireless program request or playback broadcast audio program, on this basis, said dynamic storage cell adopts the DDR2 memory bar of 1G; Can satisfy the dynamic memory of vehicle-mounted radio reception under the high-speed cruising and the demand of concussion characteristic; Simultaneously, also avoided the height of a certain device of simple pursuit to dispose and the waste resource, rationally controlled cost.
Embodiment 6:
Different with embodiment 1 is that this routine said radio reception output unit comprises the esd protection subelement.
Wherein, ESD is the abbreviation of Electro-Static discharge, and said esd protection subelement is the subelement that is used to realize electrostatic discharge protection.
This example further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through IEEE 802.11b unit comprehensively; Disturb for a short time, distortion is few, and area coverage is wide; Realized high-quality onboard wireless program request or playback broadcast audio program, on this basis, said radio reception output unit comprises the esd protection subelement; Before output, carry out electrostatic discharge protection and handle, guarantee the output of audio frequency reliable and stable ground, effectively get rid of the influence of static.
Embodiment 7:
Different with embodiment 6 is that this routine said radio reception output unit also comprises the filtering interfering subelement.
This example further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through IEEE 802.11b unit comprehensively; Disturb for a short time, distortion is few, and area coverage is wide; High-quality onboard wireless program request or playback broadcast audio program have been realized; Carry out electrostatic discharge protection before the vehicle-mounted radio reception output and handle, on this basis, said radio reception output unit also comprises the filtering interfering subelement; The interference that the filtering audio-frequency information receives in processing procedure further guarantees the output of audio frequency reliable and stable ground.
Preferably, said filtering interfering subelement adopts 33pF electric capacity.
This example further adopts above-mentioned technical characterictic, and its advantage is, can receive network radio station information through IEEE 802.11b unit comprehensively; Disturb for a short time, distortion is few, and area coverage is wide; Realized high-quality onboard wireless program request or playback broadcast audio program, carried out electrostatic discharge protection before the vehicle-mounted radio reception output and handle, on this basis; Said radio reception output unit also comprises the filtering interfering subelement, and said filtering interfering subelement adopts 33pF electric capacity, adopts the effectively interference that in processing procedure, receives of filtering audio-frequency information of 33pF electric capacity; Avoid the sudden change and the interference of audio signal, further guarantee the output of audio frequency reliable and stable ground again.
The embodiment of the above is the preferred embodiments of the utility model; It is not the practical implementation scope that limits the utility model with this; The scope of the utility model comprises and is not limited to this embodiment that all shapes according to the utility model, the equivalence that structure is done change all in the protection range of the utility model.
Claims (10)
1. the vehicle-mounted audio signal reception device based on IEEE 802.11b is characterized in that, comprising:
The radio reception signal processing unit;
Dynamic storage cell is connected with said radio reception signal processing unit;
Display unit is connected with said radio reception signal processing unit;
Radio reception signal D/A conversion unit is connected with said radio reception signal processing unit;
The radio reception output unit is connected with said radio reception signal processing unit through radio reception signal D/A conversion unit;
IEEE 802.11b unit is connected with said radio reception signal processing unit through interface unit;
Antenna element is connected with said IEEE 802.11b unit; And,
PMU is connected with the radio reception signal processing unit with said IEEE 802.11b unit respectively.
2. the vehicle-mounted audio signal reception device based on IEEE 802.11b according to claim 1 is characterized in that, said radio reception signal processing unit adopts the CPU subelement, and said CPU subelement is connected with IEEE 802.11b unit through interface unit.
3. the vehicle-mounted audio signal reception device based on IEEE 802.11b according to claim 1 and 2 is characterized in that, said antenna element is fixedly installed in behind the automobile on glass.
4. the vehicle-mounted audio signal reception device based on IEEE 802.11b according to claim 1 and 2 is characterized in that, said dynamic storage cell adopts the DDR2 memory bar.
5. the vehicle-mounted audio signal reception device based on IEEE 802.11b according to claim 4 is characterized in that said DDR2 memory bar is the 1G memory bar.
6. the vehicle-mounted audio signal reception device based on IEEE 802.11b according to claim 1 and 2 is characterized in that said radio reception output unit comprises the esd protection subelement.
7. the vehicle-mounted audio signal reception device based on IEEE 802.11b according to claim 6 is characterized in that said radio reception output unit also comprises the filtering interfering subelement.
8. the vehicle-mounted audio signal reception device based on IEEE 802.11b according to claim 7 is characterized in that, said filtering interfering subelement adopts 33pF electric capacity.
9. the vehicle-mounted audio signal reception device based on IEEE 802.11b according to claim 7 is characterized in that, said dynamic storage cell adopts the DDR2 memory bar.
10. the vehicle-mounted audio signal reception device based on IEEE 802.11b according to claim 9 is characterized in that said DDR2 memory bar is the 1G memory bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120532841 CN202374257U (en) | 2011-12-19 | 2011-12-19 | Vehicle-mounted sound reception device based on IEEE (Institute of Electrical and Electronic Engineers) 802.11b |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120532841 CN202374257U (en) | 2011-12-19 | 2011-12-19 | Vehicle-mounted sound reception device based on IEEE (Institute of Electrical and Electronic Engineers) 802.11b |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202374257U true CN202374257U (en) | 2012-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120532841 Expired - Fee Related CN202374257U (en) | 2011-12-19 | 2011-12-19 | Vehicle-mounted sound reception device based on IEEE (Institute of Electrical and Electronic Engineers) 802.11b |
Country Status (1)
| Country | Link |
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| CN (1) | CN202374257U (en) |
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2011
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Granted publication date: 20120808 Termination date: 20131219 |