On Wed, 21 Mar 2007 23:45:45 +0100, Fred Bartoli
r_AndThisToo wrote:

John Larkin a écrit :
On Tue, 20 Mar 2007 14:15:43 -0600, "Tim Williams"
wrote:

Easy, you do it with one.

Tim

Fine, if your input doesn't mind floating on -400.


That one is 800Vpp, and 400Vpp isn't necessary symmetrical.
And you're having a bit of crossover distortion with the optos.

Speaking of dreadful amplifier:


.-------+----- +400
| |
.-. |
| | |
| | |
'-' |
| |
.-------+----||-+
| | ||-
| | ||-+
| | |
--- --- |
--- --- |
| | |
| | |
-------+ +-------+----+----
| | | |
| | | .-.
| | | | |
--- --- | | |
--- --- | '-'
| | | |
| | | |
| | ||-+ ===
| | ||- GND
'-------+----||-+
| |
.-. |
| | |
| | |
'-' |
| |
'-------+---- -400


That's the famous KTFG (kiss the fets goodbye) circuit.

John