Talk about the dsp radio, short wave DSP coming soon ,Radio Reviews


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Currently the radio manufacturers Tecsun and Kchibo have developed a DSP radio, then how it was DSP radio, the radio industry in the future will have any effect?
Speaking DSP radio, we have to mention their mastery of core technologies recently developed by the success of Silicon Labs Si473x, Si473x is the first highly integrated AM / FM radios, which receive input signals from the audio signal to output all the features of all integrated into a single chip. Traditional AM / FM radio implementations are large, expensive and difficult to manufacture a small number of high-volume portable applications can not provide the AM radio. Si473x chip requires only two external components in 0.15 cm2 of board space, far less than the required 50 components and 10 cm2 area of ​​traditional solutions. Thanks to advanced digital architecture, Si473x significantly simplifies design and production work, it does not require manual adjustment is the only AM / FM radio chips, which can save a few minutes for each product calibration time. Traditional AM / FM solutions may require four stages of hand tuning, Si473x is through the chip varactor and auto calibration to support a variety of antennas, making the assembly line production efficiency greatly improved.

Si473x provide good AM and FM radio station search and adjustment capability, reduced interference and improved reception. It also has good sensitivity and selectivity of the radio to receive other AM / FM radio can not detect or incorrectly identify many of the stations. Si473x offers adjustable soft mute and other audio enhancement features. Si4731 is the only support for the European (RDS) and the United States (RBDS) standard AM / FM radio chip. This feature enables radio stations and song name to be displayed in the LCD screen of any product, provides users with a portable media player, similar to the visual experience.
Silicon Laboratories is currently the sole provider of consumer DSP radio chip manufacturers, their product line are:

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Tecsun and Kchibo of DSP machines use Si4731 / 0 of the chip, this chip can achieve FM and AM reception, the actual performance is very close to the market to receive the best FM AM radio, and the product line will enable broadcast Si4734/35 fans are most concerned about the short-wave and long wave reception, multi-band radio market will lead to a revolution ..
Built-in DSP the Si4734/35 patented digital low-IF architecture, it provides traditional analog-based products can not do various functions and higher performance. The receiver chip can be provided in all supported bands, fully automated digital tuning capability, including 1kHz step frequency, and selectable channel bandwidth filters for optimal sound quality. In addition, Si4734/35 family does not require factory-aligned components, which can further improve reliability and reduce manufacturing costs; contrast, existing receivers up to three stages of manual adjustment.
Si4734/35 family of highly integrated and feature not only simplifies the design, also offers consumers a better product experience. Seek performance allows users to quickly find all the stations, with no false set. Excellent selectivity and a highly linear front end enable consumers in a crowded radio environment to hear more stations, which feature hundreds of legitimate broadcasters in a broad frequency range of the short-wave band is very important. Si4734/35 are EN55020 certified, and the only AM / FM / SW / LW reception integrated single-chip radio devices; Si4735 integrates the FM RDS decode, for listeners with station and song撤消修改

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Si4734/35 functions can be realized are:
FM reception (64M ~ 108M)
AM reception (520 ~ 1710Khz)
Short-wave receiver (2.3 ~ 21.85Mhz)
Long wave receiver (153 ~ 279khz)
FM / MW / SW / LW digital tuner
No manual adjustments
EN55020 compliant
Receiver bandwidth is adjustable
Advanced FM / MW / SW / LW Auto Search
Digital volume control
Adjustable soft mute
Automatic frequency control
Frequency synchronization control
Automatic Gain Control
Programmable de-emphasis
FM RDS and RBDS
2 or 3 wire control interface
Voltage 2.7 ~ 5.5v
Si4734/35 chip index, very good

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When the radio downstream manufacturers to choose a DSP chip, also received the same adjustment without the high reception performance, in principle, all chip manufacturers use the radio, the reception is almost no difference, manufacturers need to do now is just downstream control interface, making the new technologies and traditional radio design of the original docking platform integration, and human-computer interface design through to get the product differentiation.
Conclusion:
The use of DSP technology, making the radio manufacturers in the past with technology and knowhow accumulated in the design and manufacturing advantages are no longer obvious, even without a radio technology manufacturers precipitation in a short time to make a very good performance and consistency of radio, both MP3 and cell phone, or radio enthusiasts in the hands of wide-band radio, all benefit from this technology, all aspects of the radio chain, will be so subtle changes that occur.


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