Answer 4—Limited-weight codes are useful in communications interfaces of all types. For example, in a parallel bus used for chip-to-chip or board-to-board communications, a limited-weight code can help reduce noise and power consumption created by simultaneously switching outputs without resorting to full differential signaling.

In serial interfaces and digital recording, limited-weight codes have better inherent DC balance, making timing recovery easier and improving the noise performance.

Contributor: David Tweed