Oct 26, 2005 #1 H hangjien Newbie level 4 Joined Oct 25, 2005 Messages 6 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,327 i have the problem in selecting the transistor in my LNA. i don't know which kind of transistor i should choose. My LNA is operating at 27MHz. Is there any books that are good for beginners for designing LNAs?
i have the problem in selecting the transistor in my LNA. i don't know which kind of transistor i should choose. My LNA is operating at 27MHz. Is there any books that are good for beginners for designing LNAs?
Oct 26, 2005 #2 V vfone Advanced Member level 6 Joined Oct 10, 2001 Messages 5,709 Helped 1,616 Reputation 3,237 Reaction score 1,248 Trophy points 1,393 Activity points 36,250 try to use BFS20 from Philips: **broken link removed**
Oct 29, 2005 #3 K kasai Junior Member level 2 Joined Sep 1, 2005 Messages 22 Helped 5 Reputation 10 Reaction score 1 Trophy points 1,283 Activity points 1,439 operating frequency ,gain,handling poewr operating voltage,NF,interference signals(IMD), cost,size etc..... I think about such parameters
operating frequency ,gain,handling poewr operating voltage,NF,interference signals(IMD), cost,size etc..... I think about such parameters
Oct 29, 2005 #4 flatulent Advanced Member level 6 Joined Jul 19, 2002 Messages 4,624 Helped 489 Reputation 980 Reaction score 151 Trophy points 1,343 Location Middle Earth Activity points 46,689 At this frequency a JFET would do well. The Siliconix J308 has low noise. **broken link removed** is the data sheet. At HF, you can improve the nose performance with a step up transformer at the input.
At this frequency a JFET would do well. The Siliconix J308 has low noise. **broken link removed** is the data sheet. At HF, you can improve the nose performance with a step up transformer at the input.