What is Spread-spectrum clocking (SSC)?

Slowly varying a clock's frequency slightly to spread electromagnetic emission energy across a wider band and lower its peaks.

Field: I/O Interfaces & Buses

Spread-spectrum clocking (SSC) in the explanations

Questions that mention Spread-spectrum clocking (SSC) (1)

  1. What is the purpose of spread-spectrum clocking (SSC), used in PCI Express and elsewhere?

Related terms

PCI Express Clock and data recovery (CDR) 128b/130b encoding 8b/10b encoding AXI Bit error rate (BER) Characteristic impedance Compute Express Link (CXL) Credit-based flow control Differential signaling

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