An apparatus includes analog or mixed-signal circuitry that operates in response to a first signal, and digital circuitry that operates in response to a second signal. The apparatus further includes a signal retiming circuit. The signal retiming circuit retimes an output signal of a digital signal source to reduce interference between the digital circuitry and the analog or mixed-signal circuitry by retiming edges of the output signal of the digital signal source to fall on cycle boundaries of the first signal.