We all know that there are many functions of surface mount aluminum electrolytic capacitors, and we usually put them on the circuit with filtering, coupling, and bypass functions. There are still some high-frequency and low resistance surface mount aluminum electrolytic capacitors available now. Let's first talk about the filtering of the surface mount aluminum electrolytic capacitor.

As the name suggests, filtering is the operation of removing specific frequency bands from a signal, which is a function of suppression and anti-interference. Placed in a circuit, such a function cannot be underestimated. Some of the electronic products we use now, such as mobile phones, computers, and LCD televisions, mainly rely on signal frequency for reception. The requirements for surface mount aluminum electrolytic capacitors in electronic products are relatively high.

Energy storage function of surface mounted aluminum electrolytic capacitors

Due to the energy storage function of reactive components in the circuit, the parallel capacitor C can store some energy when the voltage supplied by the power supply increases, and release the energy when the power supply voltage drops, making the load voltage relatively smooth. The capacitor C has a smoothing effect; The inductor L connected in series with the load stores energy when the current supplied by the power supply increases (caused by an increase in power supply voltage), and releases energy when the current decreases, making the load current relatively smooth, that is, the inductor L also has a smoothing effect. The energy storage function of surface mounted aluminum electrolytic capacitors plays a significant role in assisting other electronic components in the circuit.

Coupling of Surface mounted Aluminum Electrolytic Capacitors

The coupling function of surface mount aluminum electrolytic capacitors is to transmit AC signals from the previous stage to the next stage. There are also direct coupling and transformer coupling methods for coupling. Direct coupling has the highest efficiency and the signal is not distorted, but the adjustment of the working points of the front and rear stages is relatively complex and interrelated. In order to ensure that the working point of the subsequent stage is not affected by the previous stage, it is necessary to separate the previous stage and the subsequent stage in terms of DC, while also allowing the AC signal to be smoothly transmitted from the previous stage to the subsequent stage. The method to accomplish this task is to use capacitor transmission or transformer transmission. They can both transmit AC signals and block DC, so that the working points of the front and rear stages are not interconnected. But the difference is that when using capacitors for transmission, the phase of the signal needs to be delayed, while when using transformers for transmission, the high-frequency components of the signal need to be lost. In general, capacitors are commonly used as coupling elements for small signal transmission, while transformers are commonly used as coupling elements for large or strong signal transmission