Why right angle bends on a PCB are not so bad
We’ve heard it numerous times: avoid using right angle bends in PCB routing. Here’s an article from EDN magazine explaining why it’s not as bad as most people think. The article explains that the “bad” effects like increased capacitance and circuit noise only start to be a pain for designers where signal speeds are above 1 GHz.
Right-angle bends in PC-board traces perform perfectly well in digital designs in speeds as fast as 2 Gbps. In most digital designs, the right-angle bend is electrically smaller than a rising edge. For example, the delay through a right-angle bend in an 8-mil-wide, 50Ω microstrip trace in FR-4 is on the order of 1 psec. That’s less than 1 percent of a 100-psec rise time.
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