How to bias a CS mosfet

That's not a very effective way to get some pussy.

What's up? Are you getting tired of your right hand?

Hi Jim,

Er - you do know that your filters only apply to your own personal view of the group. right?

On Fri, 12 Aug 2011 06:42:56 -0500, John Fields wrote:

--- Oh, and by the way, here's John S's circuit simplified a little, with the voltage divider the OP described and an output stage something like he may have been thinking about.

I didn't include any way to inject an AC signal and get it into the load, but if you want to play, be my guest.

Version 4 SHEET 1 880 680 WIRE -112 -96 -208 -96 WIRE 80 -96 -112 -96 WIRE 320 -96 80 -96 WIRE 592 -96 320 -96 WIRE 320 -80 320 -96 WIRE -112 -32 -112 -96 WIRE 592 -16 592 -96 WIRE 320 16 320 0 WIRE 320 16 0 16 WIRE 320 32 320 16 WIRE 432 32 320 32 WIRE 320 64 320 32 WIRE 80 80 80 -96 WIRE 432 80 432 32 WIRE -112 96 -112 48 WIRE 48 96 -112 96 WIRE 144 112 112 112 WIRE 256 112 224 112 WIRE 592 112 592 64 WIRE 0 128 0 16 WIRE 48 128 0 128 WIRE -208 192 -208 -96 WIRE -112 192 -112 96 WIRE 432 192 432 160 WIRE 544 192 432 192 WIRE 320 208 320 160 WIRE 432 224 432 192 WIRE -208 336 -208 272 WIRE -112 336 -112 272 WIRE -112 336 -208 336 WIRE 80 336 80 144 WIRE 80 336 -112 336 WIRE 320 336 320 288 WIRE 320 336 80 336 WIRE 432 336 432 304 WIRE 432 336 320 336 WIRE 592 336 592 208 WIRE 592 336 432 336 WIRE -208 400 -208 336 FLAG -208 400 0 FLAG 592 -96 Vcc FLAG 432 32 Vcc/2 SYMBOL voltage -208 176 R0 WINDOW 3 24 104 Invisible 0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR Value PULSE(0 30 0 1 0 1.5) SYMATTR InstName V1 SYMBOL Opamps\\LT1037 80 48 R0 SYMATTR InstName U1 SYMBOL res -128 -48 R0 SYMATTR InstName R1 SYMATTR Value 10k SYMBOL res -128 176 R0 SYMATTR InstName R2 SYMATTR Value 10k SYMBOL res 304 -96 R0 SYMATTR InstName R5 SYMATTR Value 1000 SYMBOL res 304 192 R0 SYMATTR InstName R3 SYMATTR Value 500 SYMBOL res 416 64 R0 SYMATTR InstName R4 SYMATTR Value 10k SYMBOL res 416 208 R0 SYMATTR InstName R6 SYMATTR Value 2k SYMBOL npn 256 64 R0 SYMATTR InstName Q1 SYMATTR Value 2N3904 SYMBOL res 240 96 R90 WINDOW 0 -36 58 VBottom 0 WINDOW 3 -34 58 VTop 0 SYMATTR InstName R7 SYMATTR Value 1000 SYMBOL res 576 -32 R0 SYMATTR InstName R8 SYMATTR Value 1000 SYMBOL nmos 544 112 R0 SYMATTR InstName M1 SYMATTR Value FDS3570 TEXT -192 368 Left 0 !.tran 1

-- JF

I'm not anyone's enemy - but that didn't stop me finding one I wasn't looking for!

I think you'd find if you weren't allways wrong - I pointed out that I don't have LTspice installed on this PC and CBA correcting that oversight.

Such a loser would by neccessity be ambidextrous.

--- And, it seems, some of them have even learned to type.

With enough typewriters and enough time maybe one day we'll see that fabled issue of the Britannica.

-- JF

Don't they keep proto-hominids like you in a cage!

What for?!

Not doing it is getting you in such a rage you might burst a blood vessel.

What's a typewriter?

John

There are all sorts of ways to post circuits: photos of sketches, ascii art, screen captures, pretty PDFs, netlists of various forms, verbal descriptions.

An LT SPice netlist is a minor nuisance, both to create and to pluck out of a post and get into Spice. A sketch conveys a concept instantly. S does a decent verbal description.

John

Insignificant compared to the spectacle you've made of yourself.

Post us an original mosfet biasing circuit, in any form you prefer.

John