150 ohms, to be exact. I tried that, but got the same noise.
So then is it the transistor, or the cascode? I can't imagine it's the follower...
Tim
-- Seven Transistor Labs, LLC Electrical Engineering Consultation and Contract Design Website: http://seventransistorlabs.com
I do not understand the need for Q5,6,7,8 - since the input and output are capacitively coupled why the obsessive biasing arrangement. What is wrong with just biasing Q4 via R5?
piglet
And saved a lot of parts!
-- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
If it doesn't need a lot of signal swing, R5 is all the bias network that it needs.
-- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
VOM1271? As quiet as it can get and only diodes. ;-)
Best regards, Piotr
Heh.
Well, I need 4mA, so that's kind of out.
Would make it possible to try JFETs though. Use a small coupling cap and a huge bias resistor.
Tim
-- Seven Transistor Labs, LLC Electrical Engineering Consultation and Contract Design Website: http://seventransistorlabs.com
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