Passive Filter Circuit Diagram. Active filters are capable of dealing with very low frequencies approaching 0 hz and they can provide voltage gain passive filters cannot. This is important because inductors are problematic in the context of integrated circuit manufacturing techniques.
This arrangement will provide a selective filter which passes only certain frequencies. This is important because inductors are problematic in the context of integrated circuit manufacturing techniques. Simply by connecting resistor r in series with a capacitor c gives rc low pass filter.
The value of this high cut off frequency can be calculated using the formulae.
They use combinations of r l and c. The first half of the circuit is a high pass filter which filters the low frequencies and allows only the frequency that is higher than the set high cut off frequency fchigh. This new rc filter circuit can able to pass either a narrow range of frequencies or wide range of frequencies. In simple filter circuits comprised of one reactive component and one resistor cutoff frequency is that frequency where circuit reactance equals circuit resistance.
