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| The ten essentials of hardware circuit design must remember
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| Published：2013.08.01 Views： |
The ten essentials of hardware circuit design must remember
A power supply system, is the blood, to cost, which is very beneficial to the stability of the product and through various authentication is the.
1 as a PI type filter, increased 10uH inductance, each chip power supply pins to ground 104 bypass capacitor;
2 the varistor or transient diode, surge suppression;
3 and several electric power module to separate, separate high current and small current loop, using magnetic beads or zero ohm resistor separated;
4 designed to leave a margin, avoid power chip overheating, attack consumption reached 50% of the rated value to fin.
Two, the input IO remember to pull;
Three, the output IO remember accounting driving ability;
Four, high speed IO, wiring is too long by 33 European resistance inhibitory reflex;
The match between the five, each chip level;
Six, whether the switching devices need to avoid overshoot characteristics of the transistor switch;
Seven, the single board testing circuit, can independently accomplish the function test;
Eight, to have the important signal and ground test point;
Nine, version identification;
Ten, a state indicating lamp.
If the design schematic of each, to carefully check the above ten points, will improve the success rate of product design, reduce the number of changes, shorten the design cycle.
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