Printed PCB Card Duplication Line Effects

1, strictly control the track length in the key network:

if there is existence of boundary in the high speed jumping, it must consider the issue of transmission line on the printed pcb card duplication. And nowadays the most popularly used high speed integrated circuits with extremely high clock frequency, and there is a basic principle to solve this issue, if use the CMOS or TTL circuit to design the patterns, and the working frequency is less than 10MHZ, the longest track shouldn’t extend to more than 7 inch, if the working frequency is 50Mhz, then the longest track shouldn’t greater than 1.5inch after printed pcb card duplication.

If the working frequency is achieved or higher than 75Mhz, then the track layout shouldn’t greater than 1inch. as the GAAS chip, the longest layout tracks it can accept is 0.3inch. if exceed this standard then it must use the software simulation to locate the tracks, and the precise length of the track must be controlled and organized by the physical software after printed pcb card duplication.

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