MOTM

At 2:05 PM -0500 06/20/01, Paul Schreiber wrote:
>
>> 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.

So it's also a compound noun referring to another part, and in that case I
was wrong.  However, that is not to what I was referring.  Like I said, in
the example below, it's an adjective describing a noun.  So any cap that is
switched is a switched cap.  Just like one could say, "mastering
compressors use switched resistors instead of pots."  Now, "switched
resistor" might also be a compound noun referring to something else, but
the speaker wasn't using that word.

While I more than appreciate your vast knowledge of electronics, you'll
notice I don't go around grading people's posts :)

>>>Also, some circuits use varactors -- which in my limted understanding
>>>is a semi-conductor variable capacitor.  I believe that's what
>>>used in a Manley de-esser.  Otoh, acceleration limiters use
>>>switched caps.