POWER SUPPLY INDUCED SIGNAL JITTER COMPENSATION

摘要

Examples of circuits and methods for compensating for power supply induced signal jitter in path elements sensitive to power supply variation. An example includes a signal path coupling an input to an output, the signal path including a delay element having a first delay and a bias-controlled delay element having a second delay. The first delay of the delay element exhibits a first response to changes in power applied thereto and the second delay of the bias-controlled delay element exhibits a second response to changes in the power applied such that the second response compensates at least in part for the first response.

主权项

1. An apparatus, comprising:
a first delay element configured to provide a first signal to an output node, wherein the first delay element is configured to adjust a drive strength of the first delay element in a first direction to change a delay of a first input signal through the first delay element, wherein the drive strength of the first delay element is adjusted based on the power supply fluctuations; and a second delay element configured to provide a second signal to the output node, wherein the second delay element is configured to adjust a drive strength of the second delay element in a second direction to change a delay of a second input signal through the second delay element, wherein the drive strength of the second delay element is adjusted based on power supply fluctuations and wherein the first signal and the second signal are mixed at the output node.