six big skills to Chooses the PCB components

1. to consider the part package choice. 
In the entire schematic diagram plan stage, we should consider the confirmation of the part package which makes in the domain stage and welds the plate design decision.Below has given when according to the part seal choice part needs to consider some suggestions
2 use good earth method.
Guarantees that there is enough shunt capacitance and horizon.When use integrated circuit, guarantees arrives in the nearness power source end (should better be horizon) position use appropriate decoupling electric capacity.The electric capacity appropriate capacity is decided by the concrete application, the electric capacity technology and the operating frequency.When the bypass electric capacity lays aside between the power source and the earth pin, approaches the correct IC pin place, may optimize the electric circuit the electromagnetic compatibility and the susceptivity.
3. assignment hypothesized part package.
Prints bill of materials (BOM) to use in inspecting the hypothesized part.If the hypothesized part correlation package,it can not be able to transmit to the domain stage.Founds a bill of materials, then in examination design all hypothesized parts.The only clause should be the power source and the place signal, because they were considered is the hypothesized part.If only carries on special processing in the schematic diagram environment, cannot be transmitted to the domain design.Only if uses in the simulation goal, demonstrates the part in the hypothesized part all to be supposed to use to have the seal part substitution.
4. guarantees you to have the integrity bill of materials data.
whether The inspection bill of materials reported has the enough integrity data or not ?After founds the bill of materials report, must carry on the careful inspection, to all part clause in incomplete component, supplier or manufacturer information supplement integrity.
5. To sort according to the components marking .
In order to be helpful to bill of materials sorting and the examination, guarantees the part marking is the continual serial number.
6.to inspect unnecessary gates.
Generally speaking, all unnecessary gate input all should have the signal connection, avoids the input end being hanging.Guaranteed you to inspect all unnecessary or the omission gate, and all did not have the segment input end all completely to be connected including the above.In some situations, if the input end is at the suspended state, the overall system all cannot work correctly.Take the double transports puts for example,to which is used frequently in the design .If the double land transport put in the IC part only to use one to transport puts,The suggestion either transports another puts also uses, either will not use the input end earth which will transport puts.And the cloth puts an appropriate unit gain (or other gains) feeds back the network, thus guarantees the entire part to be able the normal work.