Printing plates power bus wiring structure to select ---- System structure: analog and digital circuits on the component layout design and layout methods have many similarities and differences. Analog circuit due to the presence of the amplifier, the minimum noise voltage generated by the wiring will cause severe distortion of the output signal in digital circuits, TTL noise tolerance of 0.4V ~ 0.6V, CMOS Vcc noise tolerance of 0.3 ~ 0.45 times, so digital circuits with strong anti-jamming capability. Good power and ground bus reasonable choice is an important way to ensure reliable operation of the instrument, a considerable number of sources of interference generated by the power bus and ground, wherein the ground noise caused max.
