PCB Controlled Impedance

PCB Controlled Impedance

3 year ago

137 0

HAODA ELECTRONIC CO.,LIMITED

 1 min year

Product details

What is the purpose of impedance matching?

In a PCBA with resistance, inductance and capacitance, the hindrance to the current in the circuit is called impedance. Impedance is a physical quantity that represents the performance of Electronic Components or the electrical performance of a section of circuit.
The specific coordination relationship between the load impedance and the internal impedance of the signal source during signal transmission. A certain relationship between the output impedance of a piece of equipment and the impedance of the connected load, so as not to have a significant impact on the working state of the equipment itself after the load is connected. For the interconnection of electronic equipment, for example, the signal source is connected to the amplifier, and the front stage is connected to the rear stage. As long as the input impedance of the latter stage is more than 5-10 times greater than the output impedance of the previous stage, the impedance matching can be considered as good; for amplifier connection For speakers, the tube machine should be a speaker that is equal to or close to the nominal impedance of its output terminal, while a transistor amplifier has no such limitation and can be connected to speakers of any impedance.
Impedance matching has two main functions: adjusting load power and suppressing signal reflection.
Impedance matching method
There are two main methods of impedance matching, one is to change the impedance, and the other is to adjust the transmission line.
To change the impedance is to adjust the load impedance value through the series and parallel connection of the capacitor, the inductance and the load to achieve the source and load impedance matching.
Adjusting the transmission line is to lengthen the distance between the source and the load, and adjust the impedance to zero with the capacitance and inductance. At this time, the signal will not be emitted, and the energy can be absorbed by the load. In HDI High Quality PCB Products wiring, the PCB trace impedance of the digital signal is generally designed to be 50 ohms. It is generally stipulated that the coaxial cable baseband is 50 ohms, the frequency band is 75 ohms, and the paired wire (differential) is 85-100 ohms.

You May Also Like

Contact Now

If you are interested in the product, contact 2bvideo.com for more information for more information

To:: HAODA ELECTRONIC CO.,LIMITED

Message:

Submit

Disclaimer：

The information of 2bvideo.com limited shown above is provided by the user or collected on the network. Video 2B does not guarantee the authenticity,accuracy and legitimacy of 2bvideo.com limited information. Video 2B does not involve legal relationships and disputes between users arising from transactions other than secured transactions on this website. Disputes shall be settled by you through negotiation. If you are the person in charge or relevant employee of this enterprise, if you find that the enterprise information is incorrect or want to manage thiscompany, please contact us jacklee1558@gmail.com, after you claim the enterprise, you can obtain management permission, publish supplyand demand information, bring consulting orders, and remove page advertisements.

HAODA ELECTRONIC CO.,LIMITED

 Audited supplier

1 min

Address: Shenzhen, China

 Contact now