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Old 6th August 2003, 11:20 AM   #1
Stefano is offline Stefano  Italy
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Default Zen v5 non-complementary

The question is: it's possible for to avoid mismatching between output devices to use only N type mosfet in Zen5?
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Old 6th August 2003, 11:52 AM   #2
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Default Yes.

It is possible, but you must use a three devices. Two for egzample N types high power, and one P type low power. Sorry, but I don't know how to place an image into this forum. You could look at LM3886 output stage or on Douglas Self Audio Page as complex emitter follower. It's a popular solution.
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Old 6th August 2003, 12:01 PM   #3
Stefano is offline Stefano  Italy
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Default tank you

But in this manner the circuit is less simple and distortion is not the same, actually the amp is not the same,there is no other way?
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Old 7th August 2003, 12:54 AM   #4
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Old 8th August 2003, 07:18 PM   #5
Stefano is offline Stefano  Italy
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Default tank Djk

Is the same thing really? So is all that i ever want to know! Tank you very much Djk
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Old 8th August 2003, 07:41 PM   #6
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Stefano:

The Zirclotron has no valtage gain. It is essentially a power follower. You'll need to drive it from a preamp (such as Balanced Zen Linestage) that is capable of high voltage swing.
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Old 8th August 2003, 07:44 PM   #7
Stefano is offline Stefano  Italy
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It's possible to use it as a follower in a two stages amp with a BoSoZ to drive it
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Old 8th August 2003, 07:52 PM   #8
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Yes.

BOSOZ will need it's own independent split power supply for best results.

Actually, it is possible to derive the split supplies from the floating supplies but it limits the voltage swing to 1/2 the total supply (Or at least that's been my experience so far)

So, I would give the BOSOZ stage it's own split supply. BOSOZ will benefit from the higher rails anyway.

I'm working on a two-stage version that won't need a second power supply, but it may be a while.

P.S. I think you could also accomplish a single stage, all N-channel push-pull Zen with an SRPP type circuit.
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Old 8th August 2003, 08:03 PM   #9
Stefano is offline Stefano  Italy
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I was looking exactly for a follower push-pull stage to bias in A_AB class
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Old 8th August 2003, 09:44 PM   #10
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I would love to build some Zen's variation with qusi complementary gain stage.

Bartek
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