Apparatus and method for trimming static delay of a...

Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing

Reexamination Certificate

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C327S161000, C327S175000

Reexamination Certificate

active

07898308

ABSTRACT:
A system and method for trimming an unadjusted forward delay of a delay-locked loop (DLL) and trimming a duty cycle of first and second output clock signals provided by a DLL. For trimming an unadjusted forward delay, delay is added to one of a feedback clock signal path and an input clock signal path and a feedback clock signal is provided from the feedback clock signal path and an input clock signal is provided from the input clock signal path for phase comparison. For trimming a duty cycle of first and second output clock signals, one of a first delayed input clock signal and a second delayed input clock signal is delayed. The first and second delayed input clock signals are complementary. The delayed clock signal and the other clock signal are provided as the first and second output clock signals.

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