Re: SillyAmp

From: "Winfield Hill" <hill@xxxxxxxxxxx>
Date: 22 Mar 2007 05:05:02 -0700

Author: John Larkin
Date: Mon, 19 Mar 2007 15:46:04 -0700
Hey, I can do silly amps, too. [jpeg image]

+200
+12 |
| |
R |
| |/
_V_ --> | npn
| |\e
IN | | OUT
--------+ +---------
| |
| |/e
_V_ --> | pnp
| |\
R |
| |
-12 |
-200

Author: Jim Thompson
Ooooooh! That's gross ;-)

Author: John Larkin
How else are you gonna get 400 volts p-p swing with
two active parts?

Author: Tim Williams
Date: Tue, 20 Mar 2007 14:15:43 -0600
Easy, you do it with one.
Warning: input is at -400V [gif image]

+400
|
RL
|
+---- OUT
|
IN |-'
----+---|| 1500V
| |-, MOSFET
100k |
| Rs
__|______|_____
-400

Author: John Larkin
Fine, if your input doesn't mind floating on -400.

One could ac couple, unless it's a DC amplifier, then
back to two parts is better. The pnp is an mpsa92.

+275
IN |
--47k--, RL
| |
|/e +---- OUT
,---| |
| |\ |
gnd | |-'
+---|| 600V
| |-, MOSFET
100k |
| Rs
__|______|_____
-275

.

Follow-Ups:
- Re: SillyAmp
  - From: Fred Bartoli

References:
- SillyAmp
  - From: Winfield Hill

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Re: SillyAmp
... That's gross;-) ... How else are you gonna get 400 volts p-p swing with ... | |-, MOSFET ... That one has a highly optimized 2nd order distortion. ...
(sci.electronics.design)
Re: SillyAmp
... Ooooooh! ... That's gross;-) ... Author: John Larkin ... | |-, MOSFET ...
(sci.electronics.design)