Question Pool -- Category E7G
When designing an op-amp RC active filter for a given frequency range
and Q, why are the external capacitance values usually chosen first,
then the external resistance values calculated?
-
A.
- An op-amp will perform as an active filter using only standard
external capacitance values
-
B.
- The calculations are easier to make with known capacitance values
rather than with known resistance values
-
C.
- Capacitors with unusual capacitance values are not widely
available, so standard values are used to begin the calculations
-
D.
- The equations for the calculations can only be used with known
capacitance values
See answer.
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