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Tiny AM/FM receivers handle SW, LW bands

Posted: 15 Nov 2007 ?? ?Print Version ?Bookmark and Share

Keywords:fully-integrated AM/FM radio receivers? SW band? LW band?

Silicon Laboratories Inc. has introduced what it claims as the industry's first fully-integrated AM/FM radio receivers with short-wave (SW) and long-wave (LW) band coverage.

The Si4734/35 devices integrate the entire receiver from antenna input to audio outputreducing size and solution component count by over 90 percent compared to existing implementations. The 3mm x 3mm Si4734/35 devices not only simplifies the design of existing SW and LW radios but also enables the addition of SW/LW capability to consumer electronics devices such as handsets and MP3 players.

The devices customers to bring their products to market more quickly with a higher level of quality. The Si4734/35 use a patented digital low-IF architecture with an on-chip DSP that enables a variety of features and significant performance enhancement not possible using traditional analog architecture-based products. The receivers offer fully automated digital tuning in all supported bands, including 1kHz step sizes, and selectable channel bandwidth filters for optimal audio quality. Moreover, the Si4734/35 family does not require factory-aligned components, further improving reliability and reducing manufacturing cost compared to existing receivers which can require up to three stages of manual tuning.

According to Silicon Laboratories, the Si4734/35 are EN55020 certified, and the only radios to offer AM/FM/SW/LW bands in a single IC with FM RDS decode (Si4735), providing station and song identification to listeners.

Samples of the Si4734 and Si4735 are available now in a 3mm x 3mm 20-pin QFN package. Pricing begins at $3.27 in quantities of 10,000. An evaluation board is available for $150.

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