Description

<style>.e_editor{font:14px/24px Roboto,Helvetica,Tahoma,Arial,'Microsoft YaHei','b8bf53';}.e_editor div,e_editor p,e_editor td,e_editor th,e_editor li{font-weight:inherit;font-size:inherit;font-style:inherit;font-family:inherit;}.e_editor ul{margin:-10px 0 20px;}.e_editor li{padding:5px 0;}.e_table{width:96%;border-collapse:collapse;empty-cells:show;}.e_table th,.e_table td{padding:5px;border:2px solid #eee;}.e_img{padding:10px 0;text-align:center;}.e_p{line-height:20px;padding:0 0 20px;text-indent:0em;}</style> <p> <div class="e_p"> <b><span style="font-size:14px;">There are many things need to pay attention.For example:</span></b> </div> <p> <b><span style="font-size:14px;">Is the resistance of very short copper wire in small signal circuit</span></b> <b><span style="font-size:14px;">important?</span></b> </p> <p> <span style="line-height:1.5;font-size:14px;">The conduction band of printed circuit board is manufactured wide for reducing the gain error. That is why relatively wide conductive bands will be frequently applied in analog circuits. Nevertheless, many PCB designers prefer the minimum width ones to facilitate the placement of the signal lines. In all, it is very vital to calculate the resistance of the conductive band and analyze its effect for all possible problems.</span> </p> <p style="text-align:center;"> <span style="font-size:14px;"></span><img src="https://file.allpcb.com/bbs/17/05/15/154001217.jpg" alt="" /> </p> <p> <b><span style="font-size:14px;">Are there any </span><b><span style="font-size:14px;">problems among</span></b><span style="font-size:14px;"> the capacitance composed by conductive band in </span><b><b><span style="font-size:14px;">too large</span></b> </b><span style="font-size:14px;">width and the metal layer on the back of PCB?</span></b> </p> <p> <span style="text-indent:0em;font-size:14px;">The problem is very small. The capacitance formed by the conductive band of PCB is important and should always be estimated first. If this is not the case, it will not cause problems even if the wider conductive band forms a large capacitor. If problems appear, you can reduce the capacitance of the ground by removing a small piece of ground plane area. many PCB designers prefer the minimum width ones to facilitate the placement of the signal lines. In all, it is very vital to calculate the resistance of the conductive band and analyze its effect for all possible problems.</span> </p> </p>