How to understand the bypass function of capacitance in power supply circuit

We know that capacitors are often used in power circuits to achieve bypass, de-coupling, filtering and energy storage, so how do we understand these functions? Today, Xiaobian first to give you an analysis of the bypass.

This IS A CAPACITOR THAT CAN BYPASS THE high-frequency component of ALTERNATING current mixed with high-frequency and LOW-frequency currents, called "BYPASS capacitance". For the same circuit, the bypass capacitor takes the high-frequency noise in the input signal as the filtering object, and filters the high-frequency clutter carried by the front stage.

How to understand the bypass function of capacitance in power supply circuit
Bypass capacitor branch's main function is to produce a communication, thus the vulnerable area expunction that do not require energy, namely when mixed with high frequency and low frequency signal through the amplifier amplification required by allowing only when a certain level of low frequency signal input to the next level, without the need for high frequency signals into, is in the level of input and a grounding capacitance of proper size, The higher frequency signal is easily bypassed through this capacitor (because the capacitor has a small impedance to the high frequency), while the lower frequency signal is transmitted to the next stage for amplification because the capacitor has a large impedance to it.

The bypass capacitor is an energy storage device that provides energy for the local device. It can homogenize the output of the voltage regulator and reduce the load demand. Like a small rechargeable battery, a bypass capacitor can be charged and discharged into the device. To MINIMIZE IMPEDANCE, THE BYPASS CAPACITOR IS KEPT AS CLOSE AS POSSIBLE TO THE POWER SUPPLY PINS AND GROUND PINS OF THE LOADED DEVICE. This is a good way to prevent low potential elevation and noise caused by large input values.

Recommended Articles

Leave a Reply