[sdiy] FET for VCO cap discharge

[Ian Fritz]

At 09:57 AM 10/23/05, JH. wrote:

>Wait a minute - I thought that's an open collector comparator, so the
>maximum voltage would be where your collector resistor goes, i.e.
>GND ? So the Gate capacitance is discharded by 3.2kOhm to GND
>(FET turn on), and discharged by the open collector to the negative rail
>(FET turn off, immediate start of new ramp)


Oops -- you're right of course.  Output is pulled up to 0V.