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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: Re: I fixed a bias problem in my Mosfet follower (experiment #1 continued) posted by mfc on July 1, 2003 at 18:58:45:
> What effect does feedback have when it isn't
exactly 180 degrees? <If it's 360 degrees it becomes an oscillator. If it's not exactly 180 degrees as most feedback loops get into near the point where the gain gets to one, the difference from 180 degrees is called the phase margin and this results in various amounts of overshoot on a transient response. So any deviation from 180 degrees of feedback is subject to some miscues in transient performance.
With respect to how much steady state distortion reduction you get, I believe you can take the real part as the sole contributor. The amount of imaginary part will have no help nor hindrance in that regard I believe because it does not oppose the signal nor increase the signal - it is "orthogonal" to the signal, which is therefore neutral in steady state conditions. I'm not reading any technical manual, I am just thinking out loud here. Scott will probably give us the exact answer to that if he is so inclined to do so.
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Follow Ups
- Re: I fixed a bias problem in my Mosfet follower (experiment #1 continued) - kurt s 07/1/0322:02:39 07/1/03 (8)
- PS - kurt s 22:29:04 07/1/03 (0)
- Re: I fixed a bias problem in my Mosfet follower (experiment #1 continued) - mfc 22:25:41 07/1/03 (6)
- Re: I fixed a bias problem in my Mosfet follower (experiment #1 continued) - Scott Frankland 01:43:17 07/2/03 (4)
- Re: I fixed a bias problem in my Mosfet follower (experiment #1 continued) - mfc 18:34:52 07/2/03 (3)
- Re: I fixed a bias problem in my Mosfet follower (experiment #1 continued) - Scott Frankland 19:41:37 07/2/03 (2)
- Re: I fixed a bias problem in my Mosfet follower (experiment #1 continued) - mfc 22:15:08 07/2/03 (1)
- Re: I fixed a bias problem in my Mosfet follower (experiment #1 continued) - Scott Frankland 23:42:07 07/2/03 (0)
- Re: I fixed a bias problem in my Mosfet follower (experiment #1 continued) - kurt s 22:33:03 07/1/03 (0)
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