On Thu, 21 Jun 2007 04:39:44 -0700, Leopard wrote:


I am working on micropower 433,92MHz battery powered receiver and have
a problem with LNA. I have tried a few configurations (including
cascode) but I cannot lower current consumption below 400 uA. It is
too much for me. I don't need high gain because this LNA is to be a
buffer only but device price should be as low as possible. Have you
any idea how to lower the current? I don't need exact project but some
advice.

Please note that if you are running the LNA or mixer at very low
current, the strong signal handling will be very poor from signals at
the frequency or nearby frequencies. If you are going to run the LNA
or mixer at very low currents, I would strongly suggest that you put a
very narrow filter centered at 432,920 MHz in front of the LNA,
unfortunately the filter losses will degrade your system noise figure.

Paul OH3LWR