Although the fundamental filtering mechanism continues to be the same as in the passive RC filter, the active high-pass filter (HPF) integrates an operational amplifier (op-amp) to provide some essential characteristics. Gain & Control: The op-amp amplifies and controls the gain response of the filter. This is a huge benefit over passive high-pass filters, which […]
High
Understanding Passive High Pass Filter with Formulas
As we already know, a low-pass filter selectively permits signals with frequencies lower than its cutoff frequency fc to pass through. This shows that although the high-frequency elements of the input signal are attenuated (weakened), the lower-frequency elements are retained in the output. A passive high-pass filter, on the other hand, functions in the opposite […]