The temperature sensor filter effect, in the power supply circuit, the rectifier circuit will convert the AC into a pulsating DC, and then connect a large-volume electrolytic capacitor to the rectifier circuit, and use its charge-discharge characteristics to make the rectified pulsating DC voltage a relative comparison. stable DC voltage. Such as silver, copper, aluminum, lead, tin, iron, mercury, carbon and electrolyte are all excellent conductors.
All kinds of objects have different electrical conductivity, and all objects with good electrical conductivity are called conductors. The ability of this different object to pass electric current is called the conductivity of the object.
Coupling effect: In the process of low-frequency signal transmission and amplification, in order to avoid the mutual influence of the static office points of the two-stage circuit before and after, capacitor coupling is often used. Electrolytic capacitors. Conversely, objects that conduct electricity poorly are called insulators. The temperature sensor filter effect, in the power supply circuit, the rectifier circuit will convert the AC into a pulsating DC, and then connect a large-volume electrolytic capacitor to the rectifier circuit, and use its charge-discharge characteristics to make the rectified pulsating DC voltage a relative comparison. stable DC voltage. Such as silver, copper, aluminum, lead, tin, iron, mercury, carbon and electrolyte are all excellent conductors.
In practice, in order to avoid fluctuations in the power supply voltage of each part of the circuit due to load changes, electrolytic capacitors of tens to hundreds of microfarads are usually connected to the output end of the power supply and the power supply input end of the load. Because of the large volume of electrolytic capacitors Generally, it has a certain inductance and cannot effectively filter out high frequency and pulse interference signals, so a capacitor with a volume of 0.001--0.lpF is connected in parallel at both ends to filter out high frequency and pulse interference. Also, some objects are less conductive than conductors, but stronger than insulators. Such conductors are called semiconductors.
When various objects are over-charged, different objects have different blocking ability to the current passing through. Some objects can make the current pass smoothly, and some objects do not allow it to pass through, or let it pass under certain resistance.