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Old 21st December 2002, 12:59 PM   #11
eLarson is offline eLarson  United States
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Quote:
Originally posted by Circlotron
Referring to the schematic in the first posting, seeing the Q2 drain signal is just an inverted but equal amlitude version of Q1 drain signal, it doesn't appear that Q2 is really doing anything besides making the schematic look pretty. You could probably just take the signal from Q1 drain and throw Q2 and it's extra pieces away! The total source resistance may need to be altered because there is now only half the current in it.
Using only half would yield a Bride of Zen for all
intents and purposes.

Looking at the first post again, though, I see a
Source-follower (Q1) driving the Source of a
common-Gate stage (Q2) to give a non-inverting
configuration.

It might sound a little different from a Bride of
Zen, but I can't say from experience: I haven't had
the time to build the balanced Zen linestage yet.
(The fact that I've been really pleased with my BoZ
all this time hasn't added any particular urgency,
either.)

Erik
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Old 21st December 2002, 01:51 PM   #12
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If we manage to remove R1, too, from the originally-posted schematic (single-ended input and output), we could beat the Miller effect and so improve the input rolloff frequency.

JH
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Old 22nd December 2002, 10:30 AM   #13
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Default The way they design consumer electronics.

Just keep on snipping out parts till it stops working, then go back one.
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