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Old 11th March 2013, 12:19 AM   #81
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unless something unwise has been done to the transistor, then all bets are off.
Something unwise could possibly pass as our motto
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Old 11th March 2013, 12:50 AM   #82
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better put - Someone Unwise


(what a bunch of someone unwisess ......

gollumgollum )


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Old 11th March 2013, 12:53 AM   #83
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better put - Someone Unwise


(what a bunch of someone unwisess ......

gollumgollum )


Perfect. Could even add to unwiseassess
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Old 11th March 2013, 12:58 AM   #84
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beware ;

Big Cal is everywhere ...... and you know how terrible Mod he is .......

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Old 11th March 2013, 02:44 AM   #85
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In an F6 style setup, the dc bias and ac drive are set independently. If we use one set of output R100s, then while it may sound a bit umm, left field, it seems to me that Vgs matching is less important than matching of gain characteristic (eg slope and shape of Vgs vs Id curve) ...
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Old 11th March 2013, 04:06 AM   #86
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In an F6 style setup, the dc bias and ac drive are set independently. If we use one set of output R100s, then while it may sound a bit umm, left field, it seems to me that Vgs matching is less important than matching of gain characteristic (eg slope and shape of Vgs vs Id curve) ...
I believe it's the shape of the curve near bias.
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Old 11th March 2013, 04:56 AM   #87
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Makes sense ... the curve straightens up higher I go in bias so I guess that makes the matches a bit easier to make compared to lower bias ...

Last edited by kasey197; 11th March 2013 at 05:04 AM.
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Old 11th March 2013, 07:41 PM   #88
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Makes sense ... the curve straightens up higher I go in bias so I guess that makes the matches a bit easier to make compared to lower bias ...
My estimate is that the output curves that participate in load-line canceling are going to be the bigger factor in matching, but really, the output and transfer curves "work together" to set the residual harmonics (assuming this linearisation effect dominates other NF) and so I'm doubtful that most device matching methods are all that useful. The fact that dsdjoy reported random selection was as good or better at finding the results he wanted (post #69 of this thread) reinforces my hunch.
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Old 11th March 2013, 07:44 PM   #89
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Now your making me slobber. Where is that second article?
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Old 11th March 2013, 09:37 PM   #90
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Now your making me slobber. Where is that second article?
Where on the same wavelength.
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