It is strongly required in various PCB design guidelines that high frequency and high speed signal transmission lines need to maintain consistent characteristic impedance, and that 90° Angle routing at the corner of the transmission line will change the l
The circuit board software designed by many circuit board designers is designed according to the components of the circuit board software itself.
The calibration shall be carried out by an approved standard measuring institution. The quality assurance department shall register the calibrated equipment, instruments and tools and keep a calibration record book.
Whether in the manufacturing and assembly process or in actual use, PCB to have reliable performance, this is very important.
The method of high-speed PCB design and wiring to solve signal crosstalk: First, in possible cases to reduce the signal along the conversion rate usually in the device, while meeting the design specifications as far as possible to choose slow devices, and
For you to analyze the common rules of thumb in PCB design wiring: first, vertical wiring, second, heat dissipation hole, third, right Angle wiring
SMT manufacturing units are fully automatic, high precision and high speed. As the degree of automation increases, PCB design must meet the SMT equipment requirements.
Common ways to prevent PCB copying board: 1, grinding, 2, sealing glue, 3, use special encryption chip, 4, the use of uncracking chip, 5, use MASK IC, 6, the use of nude, 7, in the current of the signal line series more than 60 ohms of resistance, 8, use
The design defects of PCBA are difficult or even impossible to solve in the production process. The negligence of PCB design quality control will lead to the waste of components, materials and working hours, and even cause heavy losses.
Only under certain conditions can the 20H principle have obvious effects. 1. The power plane shall be located inside the PCB, and the upper and lower layers adjacent to it shall be 0V planes, and the distance between the two 0V planes shall be at least 20
The characteristics of the gold process: the copper on the circuit board is mainly copper, copper solder in the air is easy to be oxidized, which will cause the electrical conductivity is to eat tin bad or bad contact, reduce the performance of the circui
Soft and hard combined board PCB design points: 1, flexible area line design requirements, 2, dimensional stability, 3, covering film window design, 4, rigid flexible transition zone design, 5, flexible zone design with air-gap requirements
