Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Rectangular or pulse waveform width control
Reexamination Certificate
2008-01-08
2008-01-08
Lam, Tuan T. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Rectangular or pulse waveform width control
C327S172000, C327S173000, C327S174000, C327S176000
Reexamination Certificate
active
07317341
ABSTRACT:
A duty correction device includes: a duty correction unit having a plurality of duty correction cells for selectively activating the duty correction cells according to a count signal to adjust a pulse width of an input clock and output the adjusted clock as an output clock; a phase splitter for generating a rising and a falling clocks by phase-splitting the output clock; a DCC pumping unit for generating a rising and a falling duty ratio correction signals according to a reset signal; a voltage comparing unit for generating counting increase and decrease signals according to a result of comparing the rising and the falling duty ratio correction signals in response to a comparison control signal; a comparison control unit for generating the comparison control signal and the reset signal; and a counter for increasing/decreasing a value of the count signal according to the counting increase and decrease signals.
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Blakely & Sokoloff, Taylor & Zafman
Hynix / Semiconductor Inc.
Lam Tuan T.
O'Neill Patrick
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