专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US06229855B1 Adaptive transmitter for digital transmission 失效
标题翻译：用于数字传输的自适应发射机
公开(公告)号：US06229855B1
公开(公告)日：2001-05-08
申请号：US08917632
申请日：1997-08-22
申请人： Hiroshi Takatori , Ahmed F. Shalash
发明人： Hiroshi Takatori , Ahmed F. Shalash
IPC分类号： H04K102
CPC分类号： H04B3/08 , H04L1/0001
摘要： A method for controlling the power and/or frequency output of a digital data network's transmitters is described. The method controls the transmitter power and/or frequency output by using line loss information as well as the noise margin at both the central office and remote site sides of the transmission link. The transmitters are controlled to minimize the crosstalk between the interconnections on the network. Measurements are taken of the cable losses and signal-to-noise ratios present on the system and the transmitter power and/or frequency are adjusted to minimize unwanted interactions between transceiver pairs on the network.
摘要翻译：描述了一种用于控制数字数据网络发射机的功率和/或频率输出的方法。该方法通过使用线路损耗信息以及传输链路的中心局和远程站点侧的噪声容限来控制发射机功率和/或频率输出。发射机被控制以最小化网络上互连之间的串扰。测量系统上存在的电缆损耗和信噪比，并调整发射机功率和/或频率以最大限度地减少网络上收发器对之间的不必要的相互作用。

2. 发明授权

US07570934B2 Automatic gain control circuit 有权
标题翻译：自动增益控制电路
公开(公告)号：US07570934B2
公开(公告)日：2009-08-04
申请号：US11406505
申请日：2006-04-18
申请人： Ahmed F. Shalash
发明人： Ahmed F. Shalash
IPC分类号： H04B1/06
CPC分类号： H03G3/3068
摘要： An automatic gain control circuit is disclosed. The automatic gain control circuit receives a radio frequency signal at an input. The input passes the radio frequency signal to a first gain loop having a changeable gain. A low pass filter filters the radio frequency signal. In a second gain loop, the gain of the filtered signal is adjusted. The automatic gain control circuit includes at least one signal detector for detecting a signal level in the first gain loop and a signal level in the second gain loop. The automatic gain control circuit also includes an adjustment module for adjusting the gain of the first and second gain loops based upon the detected signal levels wherein overall gain of the first and the second gain loops is increased no greater than a predetermined value.
摘要翻译：公开了一种自动增益控制电路。自动增益控制电路在输入端接收射频信号。输入将射频信号传递到具有可变增益的第一增益环路。低通滤波器对射频信号进行滤波。在第二增益环路中，调整滤波后的信号的增益。自动增益控制电路包括用于检测第一增益环路中的信号电平和第二增益环路中的信号电平的至少一个信号检测器。自动增益控制电路还包括调整模块，用于根据检测到的信号电平来调整第一和第二增益环路的增益，其中第一和第二增益环路的总增益不大于预定值。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式