The active speech filter online calculator can select the filter type according to the design requirements and input the filter bandwidth to calculate the corresponding parameters.
Instructions for use: Please select the type of filter you want to design (Qualcomm, Low Pass or Bandpass Filter). Click [Display Circuit Diagram] to display the circuit schematic;
Input parameters: voltage amplification factor; filter cutoff frequency in HZ; capacitance C2 value in nF. When you design a bandpass filter, enter the filter bandwidth you want to design in the bandwidth box.