Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Rectangular or pulse waveform width control
Reexamination Certificate
2011-03-29
2011-03-29
Luu, An T (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Rectangular or pulse waveform width control
C327S158000, C327S172000
Reexamination Certificate
active
07915939
ABSTRACT:
A duty cycle correction apparatus includes a fixed delay unit configured to set a fixed delay time to a DLL clock signal and generate a delay rising clock signal; a variable delay unit configured to delay the DLL clock signal in response to a control signal and generate a delay falling clock signal; a duty cycle correction unit configured to generate a correction rising clock signal and a correction falling clock signal that are toggled in conformity with edge timing of the delay rising clock signal and the delay falling clock signal; and a delay control unit configured to detect duty cycles of the correction rising clock signal and the correction falling clock signal and generate the control signal.
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Choi Hae Rang
Han Sung Woo
Hwang Tae Jin
Jang Jae Min
Kim Hyung Soo
Hynix / Semiconductor Inc.
IP & T Group LLP
Luu An T
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