EMC Question of the Week: December 2, 2024

100 MHz clock signal distributed to four components on a circuit board

A 2-Ω, 100-MHz clock source drives 4 CMOS inputs on a circuit board over a distance of about 5 cm. The trace impedance is about 75 Ω. Which terminating resistor(s) configuration shown in the figure is appropriate? 

  1. parallel 75-Ω resistor at far end
  2. parallel 75-Ω resistor at source end
  3. parallel 75-Ω resistor at both ends
  4. series 10-Ω resistor at source end

Reveal Question of the Week - Answer 241202