Lily's Column
DDR 3 PCB
The DDR 3 PCB is a third generation memory chip of the synchronous dynamic RAM PCB.
The DDR 3 PCB offers you superior performance advantages over i...
DFM and DFA
DFM and DFA
The two concepts that summarize the above requirements are DFM and DFA.
DFM, acronym for Design for Manufacturing, ensures that the PCB...
How to Use the Multimeter
A multimeter is a portable instrument that measures electrical quantities like voltage, current, and resistance. It is also known as a multitester,...
6 Layers impedance design
The impedance design of the outer trace is the same as that of the 4 layers board.
The inner trace is generally more plane layer than the surface t...
4 Layers impedance design
100 ohm differential impedance recommended design
line width, spacing 5/7/5mil differential pair and the distance between the pair ≥ 14mil (3W crit...
2 Layers Impedance Design
100 ohm differential impedance recommended design
Ground package design: line width/spacing 7/5/7mil ground wire width ≥20mil signal and ground wi...
What affect PCB impedance and how to calculate impedance
The impedance of the circuit board is determined by the physical dimensions (line wide/space) and materials of the circuit and is measured in Ohms ...
Impedance Matching in PCB Design
Impedance Matching in PCB Design
It is fair to consider a PCB itself as a component in which multiple traces are connected. Each trace is different...
What is Reflow Soldering?
Scheme of a reflow soldering process:
Step 1 Solder paste printing:After mixing and acclimating the solder paste, it is manually/automatically app...
What is Wave Soldering?
Wave soldering machines are mainly used for THT (Through-Hole Technology), components that (manually or fully automatically) are inserted through t...
What is a HDI PCB ?
HDI stands for High-Density Interconnector. Thus, HDI PCB is a special type of PCB that has the capability of high-density interconnections. In sim...
How to Reverse Engineer a Schematic From a Circuit Board
This project is a result of needing to service a domestic electronic item without being able to obtain a circuit diagram.The process proved to be v...
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