Dual-edge shaping latch/synchronizer for re-aligning edges
AssigneeInternational Business Machines Corporation
InventorChristopher W. Scoville
Life of this patent
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Abstract
Integrated circuit and process for aligning a first signal with a second signal. The integrated circuit includes a single latch, a switch control circuit coupled to an input of the single latch to align an edge of the first signal with an edge of the second signal, and a second switch control circuit coupled to the output of the single latch to produce a 50% duty cycle output.
Claims27
An integrated circuit capable of aligning a first signal with a second signal that is a divide ratio of the first signal, the integrated circuit comprising:
- a single latch;
- a switch control circuit coupled to an input of the single latch to align an edge of the first signal with an edge of the second signal and to produce, for both an odd and an even divide ratio, a 50% duty cycle output.
A process for aligning a first signal with a second signal that is a divide ratio of the first signal, comprising:
- applying the second signal to an input of a single switch shaping latch;
- and
- aligning an edge of the second signal with an edge of the first signal,
- wherein, for both an odd and an even divide ratio, an output of the single switch shaping latch has a 50% duty cycle output.
A clock signal synchronization device comprising:
- a shaping latch composed of a single switch structured and arranged to align a clock signal and a divided clock signal, which is a divide ratio of the clock signal, and to output a 50% duty cycle.
A process for synchronizing a first clock signal with a second clock signal composed of a divide ratio of the first clock signal, in which edges of the second clock signal are not aligned with edges of the first clock signal, the process comprising:
- aligning the edges of the second clock signal with the edges of the first clock signal through a shaping latch composed of a single switch,
- wherein, for both an odd and an even divide ratio, a 50% duty cycle is output from the shaping latch.
Dependencies are inferred from the claim text.