Timeline for Why does a class A amplifier stop amplifying at high frequencies?
Current License: CC BY-SA 4.0
7 events
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| May 31 at 23:47 | history | edited | Fabio Barone | CC BY-SA 4.0 |
Improve answer by including image of MOSFET model.
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| May 31 at 23:13 | comment | added | Tim Williams | I wouldn't say mainly; it's jointly Miller and Coss. Both are relevant to a practical amplifier design, in varying proportions depending on topology and port impedance. | |
| May 31 at 22:59 | history | edited | Fabio Barone | CC BY-SA 4.0 |
Corrected answer.
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| May 31 at 22:50 | comment | added | Fabio Barone | @greybeard Greybeard is correct, the last part of my answer is incorrect. I will edit it, thanks. | |
| May 31 at 18:40 | comment | added | John Doty | @greybeard The MOSFET has an internal gate resistance. | |
| May 31 at 16:14 | comment | added | greybeard |
you will see it reduces looks like an idealised voltage source to me, and no intervening impedances? (I'd not be surprised to see 20 V. 80 V begs explanation, too.)
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| May 31 at 14:16 | history | answered | Fabio Barone | CC BY-SA 4.0 |