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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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In Reply to: Linear Stages posted by Charles Hansen on August 3, 2003 at 08:02:29:
For instance our V-5x power amp has a bandwidth of 200 kHz, an output impedance of around 0.15 ohms, with distortion around 0.1% at 100 watts, 0.01% at 10 watts, and buried in the noise at 1 watt. This is all achieved without feedback.But, as has been pointed out previously, if you're using followers, you're using feedback. It's the feedback of the followers which is giving you an acceptably low output impedance by significantly reducing the output impedance of the previous stage. It's the feedback of the followers which is making the devices used for the follower behave far more linear than they would if they were configured as common emitter amplifiers rather than common collector amplifiers and thereby not drastically increasing the amplifier's overall distortion.
So while you can say you're achieving those numbers without global feedback (which isn't terribly difficult to do), you can't rightly say that you're achieving those numbers without any feedback because it's simply not true.
se
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- Re: Linear Stages - Steve Eddy 08/3/0309:58:08 08/3/03 (0)
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