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Oh don't belittle small capacitor. His role is very big, you don't think have used his electronic products. Anywhere if used well, die ugly, so first introduced the effect of capacitance for the capacitance is one of the passive components, its role is the following: 1, the application in the power circuit, the realization of the bypass, lotus root, filter and energy storage capacitor role, classification provide details below 1) filtering Filtering is a very important part of in the role of the capacitor. Almost all of the power supply is used in the circuit. Theoretically (i.e. assuming capacitance of pure capacitance) said, the greater the capacitance, impedance is smaller, by the higher the frequency also. But in fact most of the more than 1 uf capacitance for electrolytic capacitor, there is a lot of inductance component, so after high frequency impedance increases. Sometimes see a larger capacitance electrolytic capacitor in parallel with a small capacitance, then large capacitance at low frequency, small capacitance high frequency. Lao capacitance effect is low resistance, high frequency resistance at low frequency. The more easily through the low frequency, the greater the capacitance of the high frequency easier to pass. Specific use in filtering, large capacitor (1000 uf) filtering and low frequency, small capacitance (pf) 20 high frequency filter. Have net friend will filter capacitance compared to "pool". Due to the inability of the ends of the capacitor voltage mutation, therefore, the higher the signal frequency, the greater the attenuation, can say very image of the capacitance is like a pool, not caused by the addition of a few drops of water or the evaporation of water. It changes the voltage changes into current, the higher the frequency, the greater the peak current, so as to buffer the voltage. Filtering is charging and discharging process. 2) bypass The bypass capacitor is to provide energy for the local device of energy storage devices, it can make the output of the voltage regulator homogenization, reduce the workload requirements. Like a small rechargeable battery, bypass capacitors can be charged, and to put the electric device. To minimize the impedance to bypass capacitors, try to close to the load device power supply pin and pin. It can effectively prevent the input value is too large and cause the earth potential of raises and noise. Play is ground connection at the voltage drop across the large current burr when. Relevant search: temperature sensors, dongguan dongcheng power sensors, guan city power sensors, south side temperature sensor, temperature sensor in shenzhen, dongguan, capacitor, dongguan power sensors, foshan capacitor |