Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Clock or pulse waveform generating
Reexamination Certificate
2006-08-01
2006-08-01
Callahan, Timothy P. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Clock or pulse waveform generating
C340S146200
Reexamination Certificate
active
07084687
ABSTRACT:
A signal generator for generating a clock with lower jitter. The signal generator includes a multi-phase clock generator for generating a plurality of multi-phase reference clocks with same frequency, a multiplexer for selecting one reference clock as an output clock according to a phase selecting signal, a phase-swallow control unit having a comparator for comparing a swallow value with a reference value out of order and outputting the comparing result as a swallow control signal, and a clock selector for receiving the swallow control signal and generating the phase selecting signal. Because the reference value is provided by a counter in bit-reversed, the swallow control signal is dispersed smoothly and the jitter of the output clock is reduced.
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Chang Ming-Chun
Chang Yi-Shu
Kuan Chi-Kung
Tai Kuo-Lin
Weng Wen-Shiung
Birch & Stewart Kolasch & Birch, LLP
Callahan Timothy P.
Cox Cassandra
Realtek Semiconductor Corp.
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