Technical
How to Judge the Acceptance of PCB Quality
Which Color Circuit Board Sells the Most Expensive
Method to Solve the Noise Interference of Power Supply on High-frequency PCB Board
Disassembly Skills of Chip Components on PCB
What Factors Should Be Considered in the Selection of High-frequency PCB CCL
How to Place Special Components during PCB Layout
What Are the Functions of Capacitors in Circuits?
Testing Techniques for Common Electronics Components
What to do if There is a Short Circuit on the PCB
Desoldering Principles and knowhow during PCBA Processing
Black Oxidation of the Inner Layer of the Multilayer PCB
How to Ensure the High-performance Design of PCB
What Is the Printing Process of SMT Solder Paste?
PCB without fiducial mark, Is There Any Way to do SMT for It
What Are the Benefits of Reserving Break-up Tab for PCB Production
How Does SMT Affect PCB Production Time and Speed It Up
Classification of PCBs from three aspects
Common Problems and Solutions for Dry Film pasting during PCB Manufacturing process
Several Elements to Inspect after PCB Design
What is a halogen-free circuit board?
What Do Capacitive Coupling and Decoupling Mean?
What Are the Differences Between PCB Paste Mask and Solder Mask?
How PCBA Is Packaged and Shipped
How long can PCBA finished products be stored?
What Are the Differences and Relations Between PCB, PCBA, and SMT?
PCB Baking Specifications
PCB "Solder Mask Tenting" and "Solder Mask Opening"
Five reasons for PCB deformation and six solutions
Importance of first article inspection of PCBA board
Temperature zone standard for SMT reflow soldering
Small and medium volume PCB manufacturers in China
The main reason for PCBA cleaning
For power filter, the more capacitors, the better?
What does PCBA programming mean?
Content of PCB incoming testing
What conditions must be met for PCB circuit board soldering?
What is Blind via and Buried via
PCBA Manufacturers Temperature and Humidity Sensitive Components Management
Why choose Shenzhen SMT processing factory?
How long does it take to calculate the quotation for PCBA manufacturing?
Introduction of PCB design clearance requirements
Explanation of BOM, DIP, SMT, SMD
Introduction of the process of PCBA prototype
How to prevent pseudo soldering or cold soldering defects in PCBA manufacturing?
Factors that affect the Price of FPCB
What information is required for SMT processing at PCBA factory?
Skills of using 0ohm resistor in PCB design
How to select a PCBA manufacturer
SMT processing solder joint quality inspection
Characteristics difference between immersion gold PCB and gold plating PCB
Common malfunctions of Circuit Board Caused by Moisture
A Few Rules about PCB Panelization
Compare of multi-layer PCB with single/double layer PCB
Why do we need to introduce so many subdivided GND
Difference between immersion gold boards and gold plating boards
Aluminum PCB structure
Classification of different GND in circuit
Why PCB baking is necessary during manufacturing process
The handle and precautions of OSP board in SMT process
How to choose capacitors for filter decoupling
How to choose filter capacitor for switching power supply
5 database need for SMT process
Function of three-terminal capacitor
Introduction of PCB OSP surface treatment
Method of inspecting the quality of SMT by step
How to find the short point between VCC and GND
Difference between 850nm and 940nm infrared LED
Component layout of PCB SMT DFM
Pad shape influence on the strength and reliability of the soldering joints
The difference between high temperature solder paste and low temperature solder paste
Introduction to manual welding processing
Manual visual inspection in PCBA processing
Characteristics of the conformal coating process
Difference between hardware engineers and software engineers
PCBA processing operation rules
China PCB upstream materials has continued to soar
Difference between serial buses and parallel buses
The key points of quality control in PCBA processing
Common causes of solder beading during SMT process
Analysis of the advantages and disadvantages of HASL PCB surface
Requirements for layout of components during SMT assembly
Selection of electronic components and CCL for PCBA
Performance and appearance quality inspection of components.
Quality and Reliability of SMT Chip Processing and Production
Coupling and decoupling function of capacitor
Two methods to connect digital ground and analog ground
Common sense in SMT process

Function of three-terminal capacitor

Capacitors are indispensable components in circuits, especially filter capacitors, which are used everywhere. Generally, the capacitance has two electrodes. However, there is a type of capacitor with three terminals called a three-terminal capacitor. It has better characteristics than general two-terminal capacitors at high frequencies. Then let's take a look at this three-terminal capacitor, take a look at its structure, performance, and installation method.


For chip capacitors, three-terminal capacitors are actually four-terminal. Everyone knows that capacitors have ESL and ESR, that is, parasitic inductance and parasitic resistance. The high frequency characteristic of the capacitor is an inverted V type.


At the beginning, it has a capacitive characteristic, the higher the frequency, the smaller the impedance. When the resonant frequency point of the capacitor is reached, the higher the frequency, the parasitic inductance will play a leading role. Then it presents inductive characteristics, the higher the frequency, the greater the impedance. The latter part is what we don't want, we hope that the higher the frequency, the lower the impedance.

The three-terminal capacitor is to reduce this parasitic inductance, so this resonant frequency can go a little higher. For a chip three-terminal capacitor, actually it has four terminals, it divides the two-terminal capacitor into four terminals.


It divides the parasitic inductance of a capacitor into four parasitic inductances, and the two inductances are connected in parallel, and the parasitic inductance is reduced by half. As shown in Figure 3, the purple inductor. In this way, its capacitance has not changed, and its parasitic inductance has been reduced by half, which greatly improves the characteristics of high-frequency capacitors and makes the performance of the capacitor better.

How is it installed? As shown in Figure 3 above, the red power or signal line in the middle is disconnected, connect the through two ends of the three-terminal capacitor, and the other two ends of capacitor are connected to the ground.

However, three-terminal capacitors are a bit more expensive than ordinary capacitors. This should be a consideration of cost and performance!