Following the last piece of ferrite magnetic beads, this time we will introduce the introduction of chip three-terminal capacitors.
<Lead type ceramic capacitor>
Before introducing a chip-type three-terminal capacitor, it is best to understand the lead-type three-terminal capacitor. This helps to understand the content of the chip three-terminal capacitor.
Fig. 1 shows a conventional lead type ceramic capacitor (two terminal) structure.
The electrodes are coated on both sides of the dielectric of the single board, and the lead terminals are mounted to form a lead type ceramic capacitor structure. Since the lead terminal portion has a small inductance (residual inductance), when used as a bypass capacitor, it generates inductance with the ground.
Fig. 2 is an example of insertion loss characteristics when a capacitor is used as a bypass capacitor. In the insertion loss graph, the lower the interference, the smaller the interference. Since the impedance of the capacitor increases as the frequency increases, the insertion loss should also gradually increase in the high frequency range as indicated by the broken line in the figure. However, as described above, since the capacitor has residual inductance in actual use, interference is generated and frequency performance is lowered, so that a V-shaped insertion loss curve as shown by a solid line is exhibited.
<Three-terminal capacitor leads two leads on one side>
The three-terminal capacitor is a ceramic capacitor formed by improving the shape of the lead terminal in order to improve the high-frequency characteristics of the two-terminal capacitor. As shown in FIG. 3, the three-terminal capacitor leads two lead terminals on one side. Connect the two lead wires to the input and output terminals of the power supply and signal lines, and ground the opposite side to form the equivalent circuit diagram as shown on the right. With this connection, the lead inductances on the two lead sides will not enter the ground side, thereby greatly reducing the grounding inductance. In addition, since the inductance of the leads on the two lead sides is similar to the inductance of the T-type filter, it is possible to reduce the interference.
High Quality Rectifier Diode with Competitive Price, Fast Shipping, Order Now.Years of experience.
The company has domestic advanced diode production equipment, complete testing methods and quality assurance system.
Advanced Technology.Electronic component diodes are widely used in household appliances, green lighting, network communications, power chargers, automotive electronics and other fields.
Rectifier Diode,diode Bridge Rectifier,KBU Bridge Rectifiers,rectifier diode,Fast rectifier diode
Changzhou Changyuan Electronic Co., Ltd. , https://www.cydiode.com