It works well! Great rainbow ribbon cable!

To Peter Alfke, Symon and John Larkin: Today (April, 24th), we get back the PCB board to implement the transmission of signal using ribbon cable. We use a 47Ω serial-termination resistor and a 1.5 meter long rainbow ribbon cable. It works well. However, one of the waveforms is a little bit strange. It is actually not as good as the waveform we get using a normal single cable in the simple experiment previously. The follow figure is the strange waveform which is on the resistor, can you tell me why?

The simple experiment for prolonging the cable of our CMOS image sensor

To Peter Alfke, Symon and John Larkin: Thank you for your help. We had design a PCB board to test the method you told us and we could get it next Tuesday (April, 24th). What' more, we do a simple experiment to have a simple qualitative analysis. The conclusion is fairly positive. Thank you! If we have further information, we will also tell you.

1, The original waveform of PCLK (3.3v/24MHz) output pin:







2, A resistance of approximately 56Ω(three resistors in serial) is used as source terminator and a 1 meter long normal cable is used as transmission line. The following figure is the waveform on the far end of the cable.





3, Ditto. Waveform on the series-termination resistor. The magnitude really drops because of the reflection.