how to design mosfet amplifier stage?

pzung · 22nd January 2010, 04:09 PM

can someone point me to a resource, book, webpage, blog, etc. that can explain to me how to design mosfet gain stage?

i think what i'm after is a mosfet common source or common emitter? not even sure of terms. i've been living in tube world but i want to try my hand at some discrete low voltage (9-12v) circuits for effects pedals. another idea is to scale down a tube preamp and then possibly go into a speaker emulator, fx loop and direct in for a cheap/portable recording set-up. like the rockman 100 from the 80's without the 80's sound.

i have seen pedals using the bs170 figured i'd start with that.

i've found too much info googling and nothing written for the baby brained.

thanks a million,
pat

mjf · 05:39 PM

hello.
perhaps it helps if you have a look at pass labs..........(or passdiy.com) there are the zen amplifiers (bride of zen, b1buffer preamp,.............etc.) and zen articles.
greetings

pzung · 22nd January 2010, 06:58 PM

ooo, thanks!

the part about testing mosfets seems like everything i might want to know right now. of course can't tell until i finish reading it, but usually once i can measure something i can get a feeling for how it works.

the analogy in the citation 12 project doesn't hurt either.

thank you again,
pat

22nd January 2010, 04:09 PM	#1
pzung diyAudio Member Join Date: Jan 2010 Location: Graham,NC	how to design mosfet amplifier stage? can someone point me to a resource, book, webpage, blog, etc. that can explain to me how to design mosfet gain stage? i think what i'm after is a mosfet common source or common emitter? not even sure of terms. i've been living in tube world but i want to try my hand at some discrete low voltage (9-12v) circuits for effects pedals. another idea is to scale down a tube preamp and then possibly go into a speaker emulator, fx loop and direct in for a cheap/portable recording set-up. like the rockman 100 from the 80's without the 80's sound. i have seen pedals using the bs170 figured i'd start with that. i've found too much info googling and nothing written for the baby brained. thanks a million, pat

22nd January 2010, 05:35 PM	#2
mjf diyAudio Member Join Date: Jan 2009 Location: upper austria/near linz	hello. perhaps it helps if you have a look at pass labs..........(or passdiy.com) there are the zen amplifiers (bride of zen, b1buffer preamp,.............etc.) and zen articles. greetings Last edited by mjf; 22nd January 2010 at 05:39 PM.

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22nd January 2010, 06:58 PM	#3
pzung diyAudio Member Join Date: Jan 2010 Location: Graham,NC	ooo, thanks! the part about testing mosfets seems like everything i might want to know right now. of course can't tell until i finish reading it, but usually once i can measure something i can get a feeling for how it works. the analogy in the citation 12 project doesn't hurt either. thank you again, pat

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