[sdiy] VCA troubles, NE5517

[Fredrik Carlqvist]

Great!

Thanks! I will try the resistor at the inverting input. If it fails, it's
back to the 3080.

What great people there are here on the list. Yesterday despair, today new
hope!

Thanks again,

Fredrik C

-----Original Message-----
From: Tim Stinchcombe [mailto:tim102 at tstinchcombe.freeserve.co.uk] 
Sent: Wednesday, April 14, 2004 22:35
To: 'Fredrik Carlqvist'
Subject: RE: [sdiy] VCA troubles, NE5517

> Without the resistor, input at Vdd/2, and using Iabc = 
> 1mA+/-200uA, the output swings by +/-25mV. Putting the extra 
> 1k in reduces this to +/-2mV. Trimming it is likely to be 

Ooops! Multiply by ten, wrong value resistor at output, so its +/-250mV and
+/-20mV respectively!

Tim