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1.电路微调现状从1983年起电子部件制造商已将电压调节器应用于表面配备部件技术中。在已知种类的环氧印刷板上用凿和位置配备自动装置将表面配备部件放到事先在过滤印刷中处理的焊膏里。然后在回流连续加热炉里焊接。由于部件漏泄,电压调节器成品中输出电压处在一定的公差范围内。通过选择组件可获得较小的公差。实际上这并不现实,因为这种组件很贵,且其输出电压通常还有±0.5V的公差范围。这个问题起初是通过在电路里预先并联,在生产过程中不与
1. Circuit fine-tuning status Since 1983, electronic components manufacturers have voltage regulators used in surface-equipped components technology. On known types of epoxy printing plates, chisel and position automatic devices are used to place the surface-equipped components in a solder paste previously processed in a filter press. Then in the continuous heating furnace reflow soldering. Due to component leakage, the voltage regulator output voltage in the finished product within a certain tolerance. Small tolerances can be obtained by selecting components. In practice this is not practical because the components are expensive and usually have a tolerance of ± 0.5V on their output voltage. This problem was initially through the parallel in the circuit, not in the production process