[sdiy] Linear current source homework problem

[Tim Parkhurst]

On 10/5/06, Aaron Lanterman <lanterma at ece.gatech.edu> wrote:
>
> In class, I covered the use of an op amp and a BJT to creat a linear
> voltage-to-single-ended current source (or sink). Hal Chamberlin uses one
> as an example of a linear controlled VCA.
>
> I want to create a homework problem where the students look at one in a
> real synth circuit... oddly, I can't seem to find an example of this sort
> of circuit beyond used (beyond the Chamberlin book). Can anyone think of
> one? (I looked at Ray's linear VCA circuit, but it doesn't use a BJT in
> the current source).
>
> - Aaron
>
> -----------------------------------------------------------------------------

Oberheim OB-X VCA?


Tim (Obie freak) Servo
-- 
"Imagination is more important than knowledge." - Albert Einstein