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design of low noise amplifier in rf frontend.

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venkatesh revathi

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sir,
i am designing lna for low power.please provide me some idea of the new technique that i can adapt for my research work.
 

Can you perhaps provide more specifics as to frequency (MHz or GHz) range, required NF, required dynamic range required (e.g. IP3 point), and expected current range (power budget), or perhaps even the final application?

Not all applications required the absolute *best* noise figure that state-of-the-art technology has to offer, as sometimes the application's environment (preceded by perhaps PIN diode switches or a circulator) will 'override' or dominate the NF of the transistor used anyway.

Jim
 
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have you tried "LT1028 Ultralow Noise Precision High Speed Op Amp" data sheet here h**p://cds.linear.com/docs/Datasheet/1028fa.pdf looks quite good actually, I have to keep this in mind, I may need this for 1.8-30mhz low band receive amp, once I build a few filters. fleebay has them 2 for 17 a bit on the high side, but it looks like a performer.

You can try the ADL5523 it has a noise figure of only .8 dB. great amp for ota tv, AD does give 2 samples for prototyping purposes.
 

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