See attachment...

Just a silly playing around.

Has 9nV/rt-Hz input-referred noise... not as good as compound NPN/PNP.

But has 0.03% Distortion with no overall feedback loop.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

On Thu, 15 Mar 2007 15:20:19 -0700, Jim Thompson
wrote:

See attachment...

Just a silly playing around.

Has 9nV/rt-Hz input-referred noise... not as good as compound NPN/PNP.

But has 0.03% Distortion with no overall feedback loop.

...Jim Thompson


Hey, I can do silly amps, too.

John

On Mon, 19 Mar 2007 15:46:04 -0700, John Larkin
wrote:

On Thu, 15 Mar 2007 15:20:19 -0700, Jim Thompson
wrote:

See attachment...

Just a silly playing around.

Has 9nV/rt-Hz input-referred noise... not as good as compound NPN/PNP.

But has 0.03% Distortion with no overall feedback loop.

...Jim Thompson


Hey, I can do silly amps, too.

John


Ooooooh! That's gross ;-)

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

America: Land of the Free, Because of the Brave

On Mon, 19 Mar 2007 15:57:45 -0700, Jim Thompson
wrote:

On Mon, 19 Mar 2007 15:46:04 -0700, John Larkin
wrote:

On Thu, 15 Mar 2007 15:20:19 -0700, Jim Thompson
wrote:

See attachment...

Just a silly playing around.

Has 9nV/rt-Hz input-referred noise... not as good as compound NPN/PNP.

But has 0.03% Distortion with no overall feedback loop.

...Jim Thompson


Hey, I can do silly amps, too.

John


Ooooooh! That's gross ;-)

...Jim Thompson


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

John

Easy, you do it with one.

Tim

--
Deep Fryer: A very philosophical monk.
Website @ http://webpages.charter.net/dawill/tmoranwms

"John Larkin" wrote in message
...
On Mon, 19 Mar 2007 15:57:45 -0700, Jim Thompson
wrote:

On Mon, 19 Mar 2007 15:46:04 -0700, John Larkin
wrote:

On Thu, 15 Mar 2007 15:20:19 -0700, Jim Thompson
wrote:

See attachment...

Just a silly playing around.

Has 9nV/rt-Hz input-referred noise... not as good as compound NPN/PNP.

But has 0.03% Distortion with no overall feedback loop.

...Jim Thompson


Hey, I can do silly amps, too.

John


Ooooooh! That's gross ;-)

...Jim Thompson


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

John

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.

John

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


--
Thanks,
Fred.

On Wed, 21 Mar 2007 18:48:36 -0800, John Larkin
wrote:

On Wed, 21 Mar 2007 23:45:45 +0100, Fred Bartoli
fred._canxxxel_this_bartoli@RemoveThatAlso_free. fr_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

Yep, Just prior to the KYAG ritual ;-)

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

America: Land of the Free, Because of the Brave

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