In power supply circuits, this capacitor can be calculated to ensure the least ripple at the output. In a circuit, it can operate as a resistor. A capacitor gives dissimilar impedance values for dissimilar frequency signal. These are reactive devices that offer high resistance to low-frequency signals and low-resistance to high-frequency signals using the formula like XC= 1/2πfc. This means 1Hz & 100KHZ signals flow throughout a resistor with equal resistance.īut, a capacitor is different because its impedance or resistance will change based on the signal frequency which is flowing through. A nonreactive component like a resistor offers similar resistance to a signal apart from the frequency of the signal. It is nothing but how the impedance of a capacitor alters with a signal frequency that is flowing through it. The working of this capacitor mainly depends on the capacitive reactance principle. Filter Capacitor Working of Filter Capacitor These are very common in different types of equipment like electronics as well as electrical and applicable in different applications. So this capacitor is used to filter unwanted frequencies. The frequency value of these signals is near to 0Hz, these are also known as DC signals. Generally, a capacitor filters out the signals which have a low frequency.
#Capacitor as timer circuit series
A capacitor that is used to filter out a certain frequency otherwise series of frequencies from an electronic circuit is known as the filter capacitor.