DIY parts

[<<marjan>>]

> I chose the integrator type of design for the following reasons.  First,
> the input to the integrator is within a few millivolts of ground potential
> at all times.  This allows you to run a ground ring around everything on
> the input node: the CA3030 pin 2, one end of the timing cap, the source
> lead of the FET, and the collector of the exponential transistor in the
> CA3046.  The ground ring eliminates leakage from elsewhere on the PCB into
> the integrator, and is highly recommended.  Another advantage is the base
> to collector of the exponential transistor is within a few millivolts of 0
> volts.  This greatly reduces leakage in the transistor.  All of those
> things extend the lower range of the oscillator greatly, with no compromise
> to the upper range.  Also the sawtooth ramps up from 0 volts.  The ramp is
> perfectly straight.


Excuse me for my ignorance, but what circuit is in question as
it seems that I missed something.Is it online ?


marjan