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Posted to sci.electronics.design,sci.electronics.misc,rec.audio.tech
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rf everywhere
Wireless is everywhere now, miniaturized to an astounding degree.
Recently, I saw a report on a button size gardening gadget - stick it in the soil, it reports on moisture. Bluetooth earphones, etc. Who's designing these things? In my experience, RF designers are a rare breed, and with the digital market vastly larger, they're even rarer. I'll guess, the IC have been perfected to the no-brainer level. But still, you need need amps, filters, antenna, plus issues of noise and layout, yes/no? That stuff isn't obsoleted. I don't work in this area, but I'm curious, so can anyone elaborate on what's going on, from a system viewpoint? What are the chip functions, options, price, trade-offs? In which situations would you reject them, to roll your own? Is it simple on/off keying, or more sophisticated? Currently, in communications theory, sensor networks are a hot topic, where thousands of sensors are competing for bandwidth, but for mundane consumer apps, I doubt those issues arise. I'm looking to pick the brains of any gurus here - -- Rich |