Branch Snyder Department of International Ltd. Shenzhen-Electronic Technology Co., Ltd. - The Department of Electronic Technology Company is a professional custom single-sided, double-sided, 2-40 storey density multilayer professional supplier, to provide customers with high-precision high-quality circuit boards Shenzhen, the Shenzhen circuit board materials, quality assurance, reasonable prices. Low frequencies have little impact, but it is recommended that the analog and digital ground. At high frequencies, by beads analog and digital ground a little common ground. If directly connected analog and digital large area, can cause interference. Not less then and wrong reasons as there are four ways to resolve this problem :1 with beads connected; 2, with the capacitor connected; 3, inductively connected; 4, with 0 ohm resistor. Beads equivalent circuit corresponds to band-stop filter limit, only the noise of a frequency significantly inhibited, when the need to pre-estimate the noise frequency of use, printed circuit board material, in order to choose the appropriate model. In the case of frequency uncertain or unpredictable, beads discord. Branch Snyder Department of International Ltd. Shenzhen-Electronic Technology Co., Ltd. - The Department of Electronic Technology Company is a professional custom single-sided, double-sided, 2-40 layer multilayer professional providers, to provide customers with high-precision, high Shenzhen circuit board quality, quality assurance, reasonable prices. General FR-4 and high Tg difference of FR-4: Yes in the hot state, the flexible circuit board material, especially in the heat after moisture absorption, the mechanical strength of the material, dimensional stability, adhesion, water absorption , differences in the thermal decomposition of a variety of conditions, thermal expansion, etc., high Tg significantly better than conventional products PCB substrate material. Country of circuit board materials | Shenzhen circuit board materials | Newell hit by Shenzhen-Electronic Technology Co., Ltd. Department. Newell Shenzhen Electronic Technology Co., Ltd. (www.yipcb.com) (www.yipcb.com) strong, credible, a printed wiring board in Shenzhen, Guangdong and other industries has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Newell invasive and you hand into the brilliant, for a better future!