Study E7G09 - Hamboozler

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E7G09

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?

Select	Answer
A	The equations for the calculations can only be used with known capacitance values
B	Capacitors with unusual capacitance values are not widely available, so standard values are used to begin the calculations
C	An op-amp will perform as an active filter using only standard external capacitance values
D	The calculations are easier to make with known capacitance values rather than with known resistance values