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1. 发明授权

US5481389A Postdistortion circuit for reducing distortion in an optical communications system 失效
标题翻译：用于减少光通信系统中的失真的后失真电路
公开(公告)号：US5481389A
公开(公告)日：1996-01-02
申请号：US958976
申请日：1992-10-09
申请人： Rezin E. Pidgeon , Heather H. Rand
发明人： Rezin E. Pidgeon , Heather H. Rand
IPC分类号： H03F1/32 , H04B10/158 , H04B10/17 , H04B10/18 , H04B10/08
CPC分类号： H04B10/2933 , H03F1/32 , H04B10/25133 , H04B10/6973 , H04B2210/252
摘要： A postdistortion network for a receiver at a receiver location in an optical transmission system is disclosed. The receiver converts an optical signal carried over an optical transmission link to an RF signal. The postdistortion network includes an input terminal for receiving the RF signal and a distortion generator for generating a distortion signal from the RF signal. An adjusting circuit for adjusts the phase and amplitude of the distortion signal based on distortion at said receiver location. The adjusted distortion signal is combined with the RF signal in order to cancel or substantially suppress distortion in the RF input signal. The present invention permits individual receivers in an optical transmission system to be compensated for distortion which may be unique to that receiver location. A communications system including a predistortion network and a postdistortion network is also disclosed.
摘要翻译：公开了一种用于在光传输系统中的接收机位置处的接收机的后失真网络。接收机将通过光传输链路承载的光信号转换为RF信号。后失真网络包括用于接收RF信号的输入端子和用于从RF信号产生失真信号的失真发生器。一种用于基于所述接收器位置处的失真来调整失真信号的相位和幅度的调整电路。调整的失真信号与RF信号组合以消除或基本上抑制RF输入信号中的失真。本发明允许对光传输系统中的各个接收机进行补偿，这对于该接收机位置可能是唯一的。还公开了一种包括预失真网络和后失真网络的通信系统。

2. 发明授权

US5347388A Push-pull optical receiver having gain control 失效
标题翻译：具有增益控制的推挽式光接收机
公开(公告)号：US5347388A
公开(公告)日：1994-09-13
申请号：US753951
申请日：1991-09-03
申请人： Frank R. Little , Herman A. Kruse , John G. Megna , Rezin E. Pidgeon
发明人： Frank R. Little , Herman A. Kruse , John G. Megna , Rezin E. Pidgeon
IPC分类号： H03F3/08 , H03F3/26 , H03G3/20 , H03G3/30 , H04B10/04 , H04B10/06 , H04B10/14 , H04B10/158
CPC分类号： H03G3/3084 , H03F3/082 , H03F3/265 , H04B10/6931 , H04B10/6972 , H04B10/6973
摘要： A receiver is described for optical signals which are amplitude modulated with broadband radio frequency signals. The receiver includes an optical detector which receives the incoming optical signal and generates a radio frequency electrical signal which varies with the power level of the incoming optical signal. This electrical signal is applied to a pair of amplifiers which are connected in a push-pull relationship. A gain control circuit controls the gain of the amplifier pair.
摘要翻译：描述了用宽带射频信号进行幅度调制的光信号的接收机。接收机包括光检测器，其接收输入光信号并产生随输入光信号的功率电平而变化的射频电信号。该电信号被施加到以推挽关系连接的一对放大器。增益控制电路控制放大器对的增益。

3. 发明授权

US5850305A Adaptive predistortion control for optical external modulation 失效
标题翻译：光学外部调制的自适应预失真控制
公开(公告)号：US5850305A
公开(公告)日：1998-12-15
申请号：US769692
申请日：1996-12-18
申请人： Rezin E. Pidgeon
发明人： Rezin E. Pidgeon
IPC分类号： H04B10/155 , H04B10/04
CPC分类号： H04B10/5051 , H04B10/50572 , H04B10/50575 , H04B10/50593 , H04B10/50595 , H04B10/58 , H04B2210/254
摘要： A communication system, such as a cable television system, includes an optical transmitter (FIG. 2) that includes adaptive predistortion control circuitry (104). The adaptive predistortion control circuitry (104) measures the distortion produced by television band signals processed in the communication system. In the optical transmitter (FIG. 2), the distortion signal produced by the television signals is a relatively high-level signal from which necessary predistortion control signals may be more easily processed. Additionally, the adaptive predistortion control circuitry (104) detects both the amplitude and the polarity of distortion within the optical output (FIG. 2) of the optical transmitter, which enables the control circuit (104) to determine the correct polarity and level adjustments that should be made to the predistorter (102) included in the optical transmitter.
摘要翻译：诸如有线电视系统的通信系统包括包括自适应预失真控制电路（104）的光发射器（图2）。自适应预失真控制电路（104）测量在通信系统中处理的电视频带信号产生的失真。在光发射机（图2）中，由电视信号产生的失真信号是相对高电平的信号，从而可以更容易地处理必要的预失真控制信号。另外，自适应预失真控制电路（104）检测光发射机的光输出（图2）内的失真的幅度和极性，这使得控制电路（104）能够确定正确的极性和电平调整，应该对包括在光发射机中的预失真器（102）进行。

4. 发明授权

US5477370A Push-pull optical receiver having gain control 失效
标题翻译：具有增益控制的推挽式光接收机
公开(公告)号：US5477370A
公开(公告)日：1995-12-19
申请号：US293311
申请日：1994-08-22
申请人： Frank R. Little , Herman A. Kruse , John G. Megna , Rezin E. Pidgeon
发明人： Frank R. Little , Herman A. Kruse , John G. Megna , Rezin E. Pidgeon
IPC分类号： H03F3/08 , H03F3/26 , H03G3/20 , H03G3/30 , H04B10/04 , H04B10/06 , H04B10/14 , H04B10/158
CPC分类号： H03G3/3084 , H03F3/082 , H03F3/265 , H04B10/6931 , H04B10/6972 , H04B10/6973
摘要： A receiver is described for optical signals which are amplitude modulated with broadband radio frequency signals. The receiver includes an optical detector which receives the incoming optical signal and generates a radio frequency electrical signal which varies with the power level of the incoming optical signal. This electrical signal is applied to a pair of amplifiers which are connected in a push-pull relationship. A gain control circuit controls the gain of the amplifier pair.
摘要翻译：描述了用宽带射频信号进行幅度调制的光信号的接收机。接收机包括光检测器，其接收输入光信号并产生随输入光信号的功率电平而变化的射频电信号。该电信号被施加到以推挽关系连接的一对放大器。增益控制电路控制放大器对的增益。

5. 发明授权

US5361156A Method and apparatus for predistortion 失效
标题翻译：预失真的方法和装置
公开(公告)号：US5361156A
公开(公告)日：1994-11-01
申请号：US805259
申请日：1991-12-09
申请人： Rezin E. Pidgeon
发明人： Rezin E. Pidgeon
IPC分类号： H04B10/18
CPC分类号： H04B10/2507
摘要： A predistortion circuit for an optical communications system includes a main path and a predistortion path for an RF modulating signal which are independently level adjusted and impedance matched to a laser diode. The distortion path includes a distortion generator which generates a distortion signal which is substantially the same as the distortion generated by the modulation of the transmission system. The distortion path further includes an in phase adjustment leg for overall amplitude adjustment and amplitude adjustment as a function of frequency and a quadrature adjustment leg for phase adjustment as a function of frequency. Temperature compensation is provided to the adjustment networks to stabilize the gain elements of each for ambient temperature changes.
摘要翻译：用于光通信系统的预失真电路包括用于RF调制信号的主路径和预失真路径，其独立地对激光二极管进行电平调整和阻抗匹配。失真路径包括失真发生器，其产生与由传输系统的调制产生的失真基本相同的失真信号。失真路径还包括作为频率的函数的用于总体幅度调整和幅度调整的同相调整支路，以及用于作为频率的函数的相位调整的正交调整支路。温度补偿提供给调整网络，以稳定每个增益元件以实现环境温度变化。

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