> Don't worry, it isn't another part. It's a combination of parts, or
rather
> an adjective describing a noun. For example, each input of a 110 ring mod
> has a switched cap. In the case of limiters using switched caps for time
> settings, it's a rotary selector switch with a different capacitor for
each
> setting -- regular, BBQ, or extra-crispy :)
Bzzzzzzzzzzzzzzzzzzzzzz! -10 points.
A 'switched cap' is a semiconductor structure that implements a variable
capacitance
by modulating an analog switch at high frequencies. National, Linear Tech,
and Maxim
all make various filter ICs that you feed in a digital clock that is usually
100X or 50X the
cutoff frequency. They do not have resonance.
Other similar structures are 'flying capacitors', which are used in some
analog-to-digital converters.
Entire books and 1000s of papers have been written on these structures. They
are not in widespread use,
because of cost (not all that cheap) and they tend to be noisy.
Paul S.