High Pass Rc Filter Circuit. An rc circuit acts as a high pass filter when constructed as shown in figure 1a. For comparison an rc low pass filter is shown in figure 1b.
As you can see the capacitor and resistor positions are reversed between the two circuits. Rc high pass filter since capacitive reactance decreases with frequency the rc circuit shown discriminates against low frequencies. The circuit is an ac voltage divider with an output which falls off at low frequencies at the rate of 6 db per octave.
In the high pass circuit the capacitor is in the signal path and the resistor is the shunt component.
In the high pass circuit the capacitor is in the signal path and the resistor is the shunt component. The name high pass is so called because the circuit blocks the low frequencies and allows high frequencies to pass through it. Rc high pass filter the rc filter is one type of passive filter because it consists only of a capacitor is in series with the resistor. An rc circuit acts as a high pass filter when constructed as shown in figure 1a.
