The high pass filter is a type of filter circuit that is used to attenuate frequencies above a cut-off frequency fC.
A simple high pass filter consists of a resistor and capacitor in series, with the output taken across the resistor.
There are three calculators on this page designed to aid in the design and understanding of high pass filters:
1) High pass filter cut-off frequency calculator
2) High pass filter capacitor selection calculator
3) High pass filter resistor selection calculator
High Pass Filter Cut-Off Frequency Calculator
The high pass filter cut-off frequency calculator can be used to calculate the cut-off frequency. Two inputs are required: (1) the resistance of R1, and (2) the capacitance of C1. Based on these values, the calculator will provide the cut-off frequency.
The mathematical formula for the cut-off frequency in terms of the resistance of R1 and capacitance of C1 is given by:
f_C = \frac{1}{2 \pi R_1 C_1}High Pass Filter Capacitor Selection Calculator
The high pass filter capacitor calculator can be used to calculate the value of capacitor needed to create a filter with a specific cut-off frequency.
It requires two inputs: (1) the desired cut-off frequency, and (2) the resistance of R1.
The mathematical relation for the capacitance of C1 in terms of the cut-off frequency fC and resistance of R1 is given by:
C_1 = \frac{1}{2 \pi f_C R_1}High Pass Filter Resistor Selection Calculator
The high pass filter capacitor calculator can be used to calculate the value of resistor needed to create a filter with a specific cut-off frequency.
It requires two inputs: (1) the desired cut-off frequency, and (2) the capacitance of C1.
The mathematical relation for the resistance of R1 in terms of the cut-off frequency fC and capacitance of C1 is given by:
R_1 = \frac{1}{2 \pi f_C C_1}If these calculators didn’t help, check out our other calculators for electronics or our comprehensive tutorials!