I plugged in about 100 data points for Current (x) and ON-Resistance 
for the Silonex NSL32SR3 Attenuator -- the errors for the very low currents are close to zero --
This is much better than the results using the Silonex equations.
Here's the equation - ymmv:
for the Silonex NSL32SR3 Attenuator -- the errors for the very low currents are close to zero -- An externally hosted image should be here but it was not working when we last tested it.
This is much better than the results using the Silonex equations.
Here's the equation - ymmv:
An externally hosted image should be here but it was not working when we last tested it.
On second thought...your formula is pegged down at 47R...it certainly can go lower
the very low resistance points are the insertion loss.
do the math for a 0.5dB 100K+100K attenuator -- you need accuracy in the tens of picoamps in the part of the range where we do most of our listening.
On second thought...your formula is pegged down at 47R...it certainly can go lower
And can also go much higher, I might add, and controllable too.
Not quite...with a more precise power delivery "engine"
. Listening range is mostly in 10s of uA to 100s of uA. With this design working range is from <1uA thru 10s of mA.I'll probably start a thread...
Several forms of equations will work -- but I have to say that the Silonex devices are all over the place!
Here's my setup -- using an LTC or ADI difference amp allows stable current in the picoAmperes:
Here's my setup -- using an LTC or ADI difference amp allows stable current in the picoAmperes:
An externally hosted image should be here but it was not working when we last tested it.
Just curious if anyone has considered using this device
http://www.silabs.com/Support Docum...-evolution-drives-optocoupler-replacement.pdf
http://www.silabs.com/Support Docum...-evolution-drives-optocoupler-replacement.pdf
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