Duty cycle correction device

Details Duty cycle correction device Duty cycle correction device

2007-10-16

2007-10-16

Nguyen, Linh My (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Rectangular or pulse waveform width control

C327S172000

Reexamination Certificate

active

11477884

ABSTRACT:
Enclosed is a duty cycle correction device for correcting a duty cycle of a clock signal output from a delay locked loop (DLL) device by using a phase mixer. The duty cycle correction device comprises: a mixer for receiving a first clock signal and a second clock signal and outputting a first signal; a phase splitter for receiving the first signal and outputting a third clock signal by delaying the first signal and a fourth clock signal by delaying and inverting the first signal; a duty detection unit for receiving the third and fourth clock signals and detecting a difference between their duty cycles; a combination unit for outputting a second signal; and a shift register for outputting a control signal to adjust a mixing ratio of the first and second clock signals in response to the second signal.

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