24 Apr '12, 2pm

Receiver protection: a game-changer

Receiver protection: a game-changer

I saw a release recently about a new family of receiver protection diodes . Receiver protection is a pretty important issue in radio transceivers of all kinds. Think about it…the receiver front-end is built to amplify very small signals – fractions of a microvolt – and needs to be protected from the output of the transmitter. Adding any kind of classic protection device like a resistor in series with the input and clamping diodes would degrade the noise figure of the receiver, so that’s a bad idea. There are easy ways to do this. One is to use separate antennas for transmitting and receiving. Another easy way is to use separate frequency bands for transmitting and receiving, and brute-force filtering on each port. But having two antennas or using a brute-force filter is a problem in a lot of radio systems. Filters get pretty big when the transmitter is delivering a lot of ...

Full article: http://www.eetimes.com/electronics-blogs/other/4371601/Re...

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