| 摘要 |
A method and circuit for distributing high speed signals, such as clock signals, along a transmission line with minimal skew at points along the signal line regardless of the distance of the points relative to the source of the signal. The signal line is left unterminated at the end of the signal line opposite the end coupled to the source. This forces the reflectance of the signal back towards the source and the constructive interference of the incident and reflected signal. In addition, the time of flight delay is set to equal the rise time of the signal. The resultant effect causes a proportional increase in edge speed to eliminate or greatly reduce skew. Furthermore, in a preferred embodiment the signal source is coupled to the signal line with an impedance substantially equal to the characteristic impedance of the signal line to minimize sensitivity of the skew reduction to parameter variations. Additionally, line Q may be boosted by increasing the inductance of the line to improve the quality of the skew reduction. |
