Sep 7, 2014 #1 D diodelite Newbie level 5 Joined Dec 8, 2009 Messages 8 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,330 Could someone please explain how the circuit operates?
Sep 7, 2014 #2 BigBoss Advanced Member level 6 Joined Nov 17, 2001 Messages 5,963 Helped 1,609 Reputation 3,225 Reaction score 1,593 Trophy points 1,393 Location Türkiye Activity points 35,833 It doesn't operate..There isn't gate bias.. Or operates in B-Class with high Vin..
Sep 7, 2014 #3 D diodelite Newbie level 5 Joined Dec 8, 2009 Messages 8 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,330 assume that the biasing is skipped.
Sep 7, 2014 #4 BigBoss Advanced Member level 6 Joined Nov 17, 2001 Messages 5,963 Helped 1,609 Reputation 3,225 Reaction score 1,593 Trophy points 1,393 Location Türkiye Activity points 35,833 diodelite said: assume that the biasing is skipped. Click to expand... If it's so, it looks like an LNA with NF optimization (Ls). Or a kind of amplifier..
diodelite said: assume that the biasing is skipped. Click to expand... If it's so, it looks like an LNA with NF optimization (Ls). Or a kind of amplifier..
Sep 8, 2014 #5 B biff44 Advanced Member level 6 Joined Dec 24, 2004 Messages 5,047 Helped 1,376 Reputation 2,748 Reaction score 1,056 Trophy points 1,393 Location New England, USA Activity points 37,910 not very well. If you eve leave it biased on with a low frequency signal, the fet would rapidly blow up. You need a resistor in the drain or source.
not very well. If you eve leave it biased on with a low frequency signal, the fet would rapidly blow up. You need a resistor in the drain or source.
Sep 9, 2014 #6 M matrix_zyl Newbie level 1 Joined Nov 8, 2012 Messages 1 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,284 I think it just an amplifier model。 I do not think it is a LNA ,because it has a resistor at input gate which could add noise。
I think it just an amplifier model。 I do not think it is a LNA ,because it has a resistor at input gate which could add noise。
Sep 9, 2014 #7 BigBoss Advanced Member level 6 Joined Nov 17, 2001 Messages 5,963 Helped 1,609 Reputation 3,225 Reaction score 1,593 Trophy points 1,393 Location Türkiye Activity points 35,833 matrix_zyl said: I think it just an amplifier model。 I do not think it is a LNA ,because it has a resistor at input gate which could add noise。 Click to expand... It's source resistance/impedance, not an extra added resistor. This circuit is definetly an LNA with source inductor degenerated/optimized.
matrix_zyl said: I think it just an amplifier model。 I do not think it is a LNA ,because it has a resistor at input gate which could add noise。 Click to expand... It's source resistance/impedance, not an extra added resistor. This circuit is definetly an LNA with source inductor degenerated/optimized.
Sep 9, 2014 #8 T THINKER_KAM_MAN Member level 5 Joined Aug 4, 2014 Messages 89 Helped 15 Reputation 30 Reaction score 14 Trophy points 8 Activity points 581 just a suggestion if it does not oscillator. then its a class "C" pulse amp