Apparatuses and Methods for Compensating for Power Supply Sensitivities of a Circuit in a Clock Path

摘要

Apparatuses and methods for compensating for differing power supply sensitivities of a circuit in a clock path. One such method includes altering signal timing of at least one of reference and feedback clock signals differently according to variations in power supply voltage to compensate for differences in delay power supply sensitivities of delays of a forward clock path and of a feedback clock path. Another example method includes providing an output clock signal in phase with an input clock signal and compensating for delay error between delays used in providing at least some of the delay of the output clock signal relative to the input clock signal by providing delays having power supply sensitivities resulting in a combined power supply sensitivity that is inverse to the delay error.

主权项

1. A method, comprising:
altering signal timing of at least one of reference and feedback clock signals differently according to variations in power supply voltage to compensate for differences in delay power supply sensitivities of static delays of a forward clock path and of a feedback clock path; and adjusting an adjustable delay of the forward clock path based at least in part on a phase difference between altered reference and feedback signals.