Oct 3, 2005 #1 M martingn Member level 1 Joined Mar 30, 2004 Messages 40 Helped 1 Reputation 2 Reaction score 1 Trophy points 1,288 Activity points 381 Hi all! Please advice were to learn FET amplifier toplogies for high impedande wideband (50mhz) amplifier like used in oscilloscope input. thanks in advance. Martin
Hi all! Please advice were to learn FET amplifier toplogies for high impedande wideband (50mhz) amplifier like used in oscilloscope input. thanks in advance. Martin
Oct 3, 2005 #2 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 Do you want to go down to DC? If not, use a JFET source follower in front of an ordinary wide band AC coupled amplifier. If you do need to go down to DC, you should use a differential configuration again with JFET inputs. If noise is not critical, you can also use MOSFET input stages.
Do you want to go down to DC? If not, use a JFET source follower in front of an ordinary wide band AC coupled amplifier. If you do need to go down to DC, you should use a differential configuration again with JFET inputs. If noise is not critical, you can also use MOSFET input stages.