The measurement method is to dissolve the sample in hot alcohol with titanium phenol as an indicator, titration required potassium hydroxide milligram number, namely its acid value.
Mainly undertake multi-layer, high density PCB design drawing board and circuit board design proofing business. Next, I will share with you the golden rules of PCB wiring.
Design the chip and integrate its digital and analog IP, and then optimize the placement of the chip in the package chosen and, in turn, the placement of the device on a multilayer PCB that is no longer sufficient.
The high-speed system Design and simulation product line provides a simulation platform for rapid modeling and passive parameter extraction of PCB board, component and system interconnection structure.
The main reason of electromagnetic interference caused by ground wire in PCB is the impedance of ground wire. When an electric current flows through a ground wire, a voltage is generated on the ground wire. This is ground noise. Driven by this voltage, a
Copper clad plate is the basic material of electronic industry, mainly used in the processing and manufacturing of printed circuit board (PCB), widely used in TV, radio, computer, computer, mobile phone, communication and other electronic products.
PCB copy board and chip, the two are more like the relationship between the lips and teeth, think about it carefully, PCB copy board is like the shelter of the chip, without the shelter, the chip can only wander around, and can not play their role.
Copy board is also called cloning or imitation, is a product design of PCB board reverse technology research, copy board is equal to copy board, copy the circuit board on the hand, and then mass production.
For PCBS that have been identified as keyboards in the device, these key characteristic parameters and indicators must be centralised and checked from the head in addition to regular inspection. To the toes.
the data is also used to check the component function. The data provided by the development department should be as easy as possible to apply directly to the test system or through simple transformations.
Copper coating can not only reduce the ground impedance, but also reduce the cross-sectional area of the loop and enhance the mirror loop of the signal. Therefore, copper coating process plays a very key role in PCB process, incomplete, truncated mirror l
After a lot of practice, the traditional aluminum plug process is changed, and white mesh is used to complete the circuit board surface welding and plug holes. Stable production and reliable quality.
