Patent ID: 7982549

Claim:
A system comprising: a first circuit configured to generate a first clock having a first period of oscillation; a second circuit configured to generate a second clock having a second period of oscillation, wherein a difference (ΔT) between the first period of oscillation and the second period of oscillation remains within a specified limit even during variations in temperature and/or during variations in the supply voltage of the system; and a control circuit configured to receive the first clock and the second clock, and further configured to: adjust, according to ΔT, a first target parameter corresponding to a first number of cycles of the first clock, when a current cycle count of the second clock reaches a second target parameter corresponding to a second number of cycles of the second clock; adjust, according to ΔT, the second target parameter, when the current cycle count of the second clock reaches the second target parameter; and generate an output clock having an output period higher than the first period and the second period, based on the second target parameter and counted cycles of one of: the second clock; and the first clock.