[sdiy] mosfet/cmos opamp

[Ian Fritz]

At 05:14 PM 10/28/2010, David G. Dixon wrote:
>Based on this, for yours I calculate a charging time of 5nF/1mA = 5 us/V.
>
>I'm driving mine from a TL074 opamp wired as a buffer, so I've got a maximum
>of about 25 mA of driving current at the lowest load impedance (+/-8V
>maximum output to a 300R load, according to the datasheet).  If that were a
>constant, then the charging rate would be 100nF/25mA = 4 us/V.

Ah, so we end up at the same place!

   Ian