In the circuit, capacitors is to cut off the DC through alternating current, and it is commonly used in inter-stage coupling, filtering, decoupling, bypass and signal tuning.
A. Filter capacitor is... (See More)
Our contract manufacturing agency have procured pcbs from approved vendor. After assembly we found solder mask separated from the PCB on the epoxy area as patches. The top side is intact.
also o... (See More)
Hi, I have been assigned to purchase a SMT assembly line for electronic ballasts used in compact energy saving lamps. I have the circuit and list of components, but know nothing about SMT. Could anybo... (See More)
1.Before wiring, the first thing is to classify the lines. The main classification method is based on the power level and each group is divided by every 30dB power level.
2.Different classificat... (See More)
I am looking for some design guidelines (length, width, spacing) for solder thieves which are placed behind trailing pins of wave soldered SOICs. I'd appreciate it if some one could direct me to the a... (See More)
1.The clock circuit and the high frequency circuit are the main sources of interference and radiation, and must be arranged separately from the sensitive circuit.
2.Note the waveform distortion du... (See More)
1.When designing the multilayer printed circuit board, the power plane should be close to the ground plane and placed under the ground plane.
2.When designing multilayer PCBs, the wiring layer s... (See More)