Aug 3, 2005 #1 T tom.h Newbie level 1 Joined Aug 3, 2005 Messages 1 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,288 Hi, Im trying to make a AM pre amp and mixer for 3.5 MHz - 4.0 MHz using a Vishay BF998 Dual Gate MOSFET. Does anyonehave any reference files for dual gate MOSFET pre amps and for a dual gate MOSFET mixer for this frequency range? The file is something quick I threw together, but didnt work at all. Any help would be greatly appreciated!
Hi, Im trying to make a AM pre amp and mixer for 3.5 MHz - 4.0 MHz using a Vishay BF998 Dual Gate MOSFET. Does anyonehave any reference files for dual gate MOSFET pre amps and for a dual gate MOSFET mixer for this frequency range? The file is something quick I threw together, but didnt work at all. Any help would be greatly appreciated!
Aug 3, 2005 #2 I IanP Advanced Member level 7 Joined Oct 5, 2004 Messages 7,929 Helped 2,311 Reputation 4,624 Reaction score 531 Trophy points 1,393 Location West Coast Activity points 66,416 Is it a drawing mistake, or do you have both G1 and G2 connected together? G1 should go to R1/C3 and G2 to C5/C6. They shouldn't be connected together .. Besides that your circuit looks pretty good .. Regards, IanP
Is it a drawing mistake, or do you have both G1 and G2 connected together? G1 should go to R1/C3 and G2 to C5/C6. They shouldn't be connected together .. Besides that your circuit looks pretty good .. Regards, IanP
Aug 3, 2005 #3 Borber Advanced Member level 5 Joined Dec 31, 1999 Messages 1,600 Helped 235 Reputation 472 Reaction score 111 Trophy points 1,343 Location on third flor Activity points 11,863 Your simulation in Microcap can't go as IanP said. I think you can give up C3 and R1 if the Q of the L1 is low enough.
Your simulation in Microcap can't go as IanP said. I think you can give up C3 and R1 if the Q of the L1 is low enough.