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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Re: Nelson Pass posted by djk on December 1, 2000 at 01:39:49:
*** Your scheme is not as good as the Pass one.Yours has a transconductance error due to the emitter resistors.By running common emitter Pass eliminates this voltage error.Other than that the idea is the same.
The (later) Stasis topology can be seen as having two output stages (EF and CE), but both are directly connected to the actual load. The CE stage is driven off the collectors of the EF stage, and its output current mirrors the EF output but is about 10 times greater. By virtue of this arrangement, distortion in the output section is .1% or less, making global NFB unnecessary. There is, however, a feedback loop around the front-end section, which basically is configured as a cascoded bi-fet op-amp. Hope this helps.
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- Re: Nelson Pass - Joe Berry 07:39:41 12/03/00 (0)
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