Staas & Halsey LLP
Clock regeneration circuit and optical signal receiver using the same
A clock regeneration circuit having a PLL circuit which includes a voltage control oscillator; a clock extraction circuit which includes a band passing filter and a harmonic component of a dividing signal of the oscillation frequency signal; a frequency detector; a filter; a bit rate detection circuit; and a frequency selection circuit outputting an oscillation frequency of the voltage control oscillator of the PLL circuit or a frequency signal obtained by dividing the oscillation frequency in response to the bit rate detected by the bit rate detection circuit, as a regeneration clock circuit.
Fujitsu Limited
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H04L H04B H03L H04L
inventional inventional inventional additional
Hiroshi Atsushi Kazuhisa
Yamada Suda Kogure