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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: Bipolar vs MOSFET vs J-FET posted by thetubeguy1954 on January 26, 2007 at 05:58:39:
Well all these devices, including tubes, do have different transfer function characteristics. Does this mean that identical circuits using different devices will sound different? Maybe. However; generally they are used quite differently and this probably accounts for a lot of the sound (especially circuits with a lot of feedback sound similar regardless of mosfet, bipolar, or to some extent even tube).A good theoretical paper on the behavior of the devices in simple, yet common circuits can be found at this link.
http://www.its.caltech.edu/~musiclab/feedback-paper-acrobat.pdf
Here they model the behavior of Mosfet, bipolar and triode in simple circuits like single ended, push pull and differential with and without feedback (in this case simple local feedback). It will give you some insight and is not that hard to read. Remember though this is theoretical behavior and the performance in an actual circuit will depend on parts quality and layout of the circuit (such as proper grounding).
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Follow Ups
- Re: Bipolar vs MOSFET vs J-FET - morricab 06:09:12 01/26/07 (2)
- Thanks much! Very interesting study! - Al Sekela 12:10:52 01/26/07 (1)
- Re: Bipolar vs MOSFET vs J-FET - tomservo 07:53:38 01/26/07 (0)
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