公开(公告)号：US06850584B2

公开(公告)日：2005-02-01

申请号：US09729949

申请日：2000-12-06

申请人： Kazuhisa Kogure ,  Hiroshi Yamada ,  Atsushi Suda

发明人： Kazuhisa Kogure ,  Hiroshi Yamada ,  Atsushi Suda

IPC分类号： H03L7/113 ,  H03L7/087 ,  H04B10/07 ,  H04B10/40 ,  H04B10/50 ,  H04B10/524 ,  H04B10/556 ,  H04B10/60 ,  H04B10/69 ,  H04J14/00 ,  H04J14/02 ,  H04L7/027 ,  H04L7/033 ,  H03D3/24

CPC分类号： H03L7/087 ,  H04B10/6932 ,  H04L7/027 ,  H04L7/033

摘要： 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.

摘要翻译： 一种具有PLL电路的时钟再生电路，包括电压控制振荡器; 时钟提取电路，其包括带通滤波器和所述振荡频率信号的分频信号的谐波分量; 频率检测器; 过滤器 比特率检测电路; 以及频率选择电路，其输出PLL电路的压控振荡器的振荡频率或者通过将比特率检测电路检测到的比特率除以振荡频率而获得的频率信号作为再生时钟电路。

公开(公告)号：US5636048A

公开(公告)日：1997-06-03

申请号：US406200

申请日：1995-03-16

申请人： Kazuhisa Kogure ,  Hirokazu Osada ,  Yasuhiro Tanaka ,  Hiroo Kitasagami ,  Makoto Miyoshi ,  Kakuji Inoue ,  Takayoshi Ikegami ,  Kenichi Kobayashi ,  Shinichiro Sano ,  Setsuo Misaizu ,  Masahiko Yamashita ,  Tatsuya Nishimura

发明人： Kazuhisa Kogure ,  Hirokazu Osada ,  Yasuhiro Tanaka ,  Hiroo Kitasagami ,  Makoto Miyoshi ,  Kakuji Inoue ,  Takayoshi Ikegami ,  Kenichi Kobayashi ,  Shinichiro Sano ,  Setsuo Misaizu ,  Masahiko Yamashita ,  Tatsuya Nishimura

IPC分类号： H03G3/20 ,  H03F3/08 ,  H03F3/34 ,  H03F3/45 ,  H03G3/30 ,  H04B3/04 ,  H04B10/07 ,  H04B10/2507 ,  H04B10/293 ,  H04B10/294 ,  H04B10/299 ,  H04B10/564 ,  H04B10/572 ,  H04L25/03 ,  H04B10/06

CPC分类号： H04B10/6933 ,  H03F3/08 ,  H03G3/3084 ,  H04B10/6931 ,  H04L25/063

摘要： In an equalizing amplifier that equalizes an electric signal obtained from a light signal received via an optical transmission path, an AGC circuit generates first and second signals from the electric signal by referring to a threshold voltage. The first and second signals are complementary signals. An offset compensation circuit generates a first difference signal based on a difference between the first and second signals, compares the first difference signal with a first reference signal, and outputs, as the threshold voltage, a resultant error signal to the AGC circuit. The threshold voltage is varied so that it is located in the center of an amplitude of the electric signal whereby an offset of the AGC circuit can be compensated for.

摘要翻译： 在均衡放大器中，均衡从经由光传输路径接收的光信号获得的电信号，AGC电路通过参考阈值电压从电信号产生第一和第二信号。 第一和第二信号是互补信号。 偏移补偿电路基于第一和第二信号之间的差产生第一差分信号，将第一差分信号与第一参考信号进行比较，并将所得到的误差信号作为阈值电压输出到AGC电路。 阈值电压变化，使其位于电信号幅度的中心，从而可以补偿AGC电路的偏移。