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公开(公告)号:US20140016949A1
公开(公告)日:2014-01-16
申请号:US13981313
申请日:2012-01-25
申请人: Hiroshi Koizumi , Masafumi Nogawa , Yusuke Ohtomo
发明人: Hiroshi Koizumi , Masafumi Nogawa , Yusuke Ohtomo
IPC分类号: H04B10/60
CPC分类号: H04B10/60 , H04B10/69 , H04B10/697
摘要: An optical signal detection circuit (10) includes an amplification circuit (11) that differentially amplifies an electrical signal (Tout) corresponding to the pulse train of an optical signal (Pin) and outputs a differential output signal (Aout), and a comparator (12) that compares the voltage value of the positive-phase signal of the differential output signal (Aout) with the voltage value of the negative-phase signal and outputs a pulsed comparison output signal (Cout) corresponding to the comparison result. The amplification circuit (11) includes a current addition circuit (11E) that adjusts a DC load current to generate a positive-phase signal (Aout+) and a negative-phase signal (Aout−) of the differential output signal (Aout) in accordance with an adjusted voltage value from an external adjusted voltage source (Vadj) and adjusts the DC bias of the positive-phase signal (Aout+) and the DC bias of the negative-phase signal (Aout−).
摘要翻译: 光信号检测电路(10)包括对与光信号(Pin)的脉冲序列相对应的电信号(Tout)进行差分放大并输出差分输出信号(Aout)的放大电路(11)和比较器 12),其将差分输出信号(Aout)的正相信号的电压值与负相位信号的电压值进行比较,并输出与比较结果对应的脉冲比较输出信号(Cout)。 放大电路(11)包括电流相加电路(11E),该电流相加电路(11E)调节直流负载电流,以产生差分输出信号(Aout)的正相信号(Aout +)和负相位信号(Aout-) 具有来自外部调整电压源(Vadj)的调整电压值,并调节正相信号(Aout +)的直流偏置和负相位信号(Aout-)的直流偏置。
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公开(公告)号:US20060050828A1
公开(公告)日:2006-03-09
申请号:US10535273
申请日:2004-03-04
申请人: Yusuke Otomo , Masafumi Nogawa
发明人: Yusuke Otomo , Masafumi Nogawa
CPC分类号: H03L7/0893 , H03L7/0895 , H03L7/091 , H04L7/033
摘要: Providing a CDR circuit having a stable clock extracting function and a data regenerating function with a high-speed data input process by reducing the operation speed of the phase comparator circuit. With a phase comparator circuit capable of operating with a clock signal whose period is 2 times the unit time width of the inputted data signal, the pulse width of the phase error signal, representing the difference in phase between the transition point of the data signal and the transition point of the clock signal, is extended as much as the unit time width of the data signal.
摘要翻译: 通过降低相位比较器电路的运行速度,提供具有稳定时钟提取功能的CDR电路和具有高速数据输入处理的数据再生功能。 利用相位比较器电路,其能够以周期为输入数据信号的单位时间宽度的2倍的时钟信号进行操作,相位误差信号的脉冲宽度表示数据信号的转变点与 时钟信号的转换点与数据信号的单位时间宽度一样扩展。
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公开(公告)号:US09025970B2
公开(公告)日:2015-05-05
申请号:US13578811
申请日:2011-02-14
CPC分类号: H04B10/69 , H04B10/697
摘要: A comparator (11) outputs, out of an electrical signal input from a trans impedance amplifier (TIA) via a coupling capacitor, pulses having amplitudes equal to or larger than a reference value as a comparison output signal (Cout). An analog holding circuit (12) charges a holding capacitor with each pulse contained in the comparison output signal (Cout) and also removes a DC voltage obtained by the charging via a discharging resistor, thereby generating a holding output signal (Hout) that changes in accordance with the presence/absence of input of an optical signal. This allows to perform an autonomous operation without any necessity of an external control signal and properly detect the presence/absence of input of an optical signal.
摘要翻译: 比较器(11)通过耦合电容从反向阻抗放大器(TIA)输入的电信号中输出具有等于或大于参考值的幅度的脉冲作为比较输出信号(Cout)。 模拟保持电路(12)对包含在比较输出信号(Cout)中的每个脉冲对保持电容器充电,并且还通过放电电阻去除通过充电获得的DC电压,从而产生保持输出信号(Hout) 根据光信号的输入的存在/不存在。 这允许执行自主操作而不需要外部控制信号并且适当地检测光信号的输入的存在/不存在。
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公开(公告)号:US20130039649A1
公开(公告)日:2013-02-14
申请号:US13578811
申请日:2011-02-14
IPC分类号: H04B10/08
CPC分类号: H04B10/69 , H04B10/697
摘要: A comparator (11) outputs, out of an electrical signal input from a trans impedance amplifier (TIA) via a coupling capacitor, pulses having amplitudes equal to or larger than a reference value as a comparison output signal (Cout). An analog holding circuit (12) charges a holding capacitor with each pulse contained in the comparison output signal (Cout) and also removes a DC voltage obtained by the charging via a discharging resistor, thereby generating a holding output signal (Hout) that changes in accordance with the presence/absence of input of an optical signal. This allows to perform an autonomous operation without any necessity of an external control signal and properly detect the presence/absence of input of an optical signal.
摘要翻译: 比较器(11)通过耦合电容从反向阻抗放大器(TIA)输入的电信号中输出具有等于或大于参考值的幅度的脉冲作为比较输出信号(Cout)。 模拟保持电路(12)对包含在比较输出信号(Cout)中的每个脉冲对保持电容器充电,并且还通过放电电阻去除通过充电获得的DC电压,从而产生保持输出信号(Hout) 根据光信号的输入的存在/不存在。 这允许执行自主操作而不需要外部控制信号并且适当地检测光信号的输入的存在/不存在。
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