When the field strength of electromagnetic field exceeds a certain limit and the operation time is long enough, it may endanger human health. It can also interfere with other electronic devices and communications. All of these need to be protected.
PCB circuit board fault detection methods: 1, determine the fault location, 2, detection equipment, 3, visual and physical detection, 4, special detection components, 5, on the circuit board for detection, 6, low voltage measurement
Impedance is usually denoted by z, z is a complex number, the real part is called resistance, the imaginary part is called reactance, and the unit of impedance is ohm.
New design PCB board to find the fault method: 1. Voltage measurement method, 2. Signal injection method, 3. See, hear, smell, touch
As the carrier of various components and the hub of circuit signal transmission, PCB has become the most important and key part of electronic information products. Its quality and reliability determine the quality and reliability of the whole equipment.
Factors related to EMC issues in PCB design: 1. System design: 2. Structural impact: 3. Cable influence: 4. Component selection: 5. Related to SI/PI simulation: 6. Grounding, 7.PCB design relationship, 8. Software anti-jamming technology: 9. Shielding: 10
Environmental protection products in addition to not toxic, but also require the product can be recycled after waste.
The simplest multilayer soft PCB is a three-layer soft PCB formed by two layers of copper shielding on both sides of a single-sided PCB. This three-layer soft PCB is electrically equivalent to a coaxial wire or a shielded wire.
A perfect PCB board not only needs to do the component selection and setting is reasonable, but also needs to have good signal conduction performance.
What samples should be provided for PCB circuit board proofing? The quotation information needs to be provided to the manufacturer, and the GEBER file is generally provided for the drawings. There are clear process requirements and quantity. The pcb manuf
PCBA processing needs to do three requirements: first, the solder paste, must be stored in 5-10 degrees of environment. In order not to affect the use of solder paste, shall not be placed in the environment below zero, second, in the process of SMT proces
Optical Inspection and Electrical Inspection include PCB manual Inspection, PCB online inspection, PCB functional inspection, PCB active optical inspection, PCB Automatic X-ray inspection and PCB laser inspection. A total of 6 detection techniques.