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

US06456665B1 Partial modification of a nominal impedance using digital impedance synthesis 失效
标题翻译：使用数字阻抗合成部分修改标称阻抗
公开(公告)号：US06456665B1
公开(公告)日：2002-09-24
申请号：US09321957
申请日：1999-05-28
申请人： Sprio Poulis , Shayne Messerly , John Evans
发明人： Sprio Poulis , Shayne Messerly , John Evans
IPC分类号： H04B308
CPC分类号： H04L27/0002
摘要： A circuit is provided for creating a termination impedance which matches a characteristic impedance. The characteristic impedance of a system or network is matched by placing a nominal impedance across the transmission line. The difference between the nominal impedance and the characteristic impedance is synthesized such that the synthesized or generated impedance is in parallel with the nominal impedance. The parallel combination of the nominal impedance and the generated impedance produces a termination impedance which substantially matches the characteristic impedance. The generated impedance is created by sensing a voltage and scaling that voltage by a factor related to the nominal and characteristic impedances. The scaled voltage controls a current source which produces a current having a value related to the inverse of the impedance. The ration of the sensed voltage and the generated current is the impedance which, when combined with the nominal impedance, produces the desired termination impedance. In this manner, the characteristic impedance of the source is matched by the altered nominal impedance.
摘要翻译：提供一个电路用于产生匹配特性阻抗的终端阻抗。通过在传输线路上放置标称阻抗来匹配系统或网络的特性阻抗。合成标称阻抗和特性阻抗之间的差异，使得合成或产生的阻抗与标称阻抗并联。标称阻抗和产生的阻抗的并联组合产生基本匹配特性阻抗的终端阻抗。产生的阻抗是通过感测电压和将该电压缩放与标称和特性阻抗相关的因子来产生的。缩放电压控制电流源，其产生具有与阻抗的反相关的值的电流。感测电压和产生的电流的比例是当与标称阻抗组合时产生期望的终端阻抗的阻抗。以这种方式，源的特性阻抗通过改变的标称阻抗匹配。

IPRDB

热门服务

关于我们

友情链接

联系方式