Timeline for answer to MOSFET Biasing Problems by LorenzoDonati4Ukraine-OnStrike
Current License: CC BY-SA 3.0
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| when toggle format | what | by | license | comment | |
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| Aug 2, 2017 at 19:09 | vote | accept | lucenzo97 | ||
| Aug 2, 2017 at 18:48 | history | edited | LorenzoDonati4Ukraine-OnStrike | CC BY-SA 3.0 |
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| Aug 2, 2017 at 18:44 | comment | added | LorenzoDonati4Ukraine-OnStrike | @Keno A good design is a design that takes into account the worst case. For an audio amplifier, if you mean a class A amplifier (one MOSFET biased in its saturation region), the design is tricky, because you cannot know in advance where Vth lies precisely. Probably you will need some kind of trimpot to manually adjust the bias on the field. | |
| Aug 2, 2017 at 18:41 | comment | added | LorenzoDonati4Ukraine-OnStrike | @Keno No! Probably you haven't understood the meaning of those min/max values. The datasheets is telling you that every specimen of that MOSFET (statistically speaking) has a Vth guaranteed to lie between those limits. You may have a bag of those and one could have, say, a Vth=1V and another a Vth=2.5V randomly. | |
| Aug 2, 2017 at 18:29 | comment | added | lucenzo97 | So, in case of audio amplifier, I would need to only bias the transistor so the Vgs is somewhere between 0.8V and 3V (in your case of your transistor)? | |
| Aug 2, 2017 at 18:08 | history | edited | LorenzoDonati4Ukraine-OnStrike | CC BY-SA 3.0 |
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| Aug 2, 2017 at 18:03 | history | answered | LorenzoDonati4Ukraine-OnStrike | CC BY-SA 3.0 |