Re: Amp output Z

On Tue, 12 Apr 2005 16:56:34 +0100, John Woodgate
<jmw@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

>I read in sci.electronics.design that Jim Thompson
><thegreatone@xxxxxxxxxxx> wrote (in
><40qn51tv3o0838tfbcs2fhi060dhht9jor@xxxxxxx>) about 'Amp output Z', on
>Tue, 12 Apr 2005:
>
>>Vm1/Vm2 = (Ro-jXc+Rm2)/(Ro-jXc+Rm1)*Rm1/Rm2
>>
>>Since your DMM doesn't give you phase, you can't solve for Ro.
>
>When you rationalise Rm1/(Ro+Rm1+jXc) to Rm1/sqrt{(Ro+Rm1)^2+Xc^2)} you
>are automatically including the effect of phase. Likewise for the
>similar but inverted expression containing Rm2.

Yep, I should have reduced it to what the meter actually shows.
However I'm pretty sure you can't get the answer you want.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

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