23-11-2020, 07:19 AM
Someone had the privilege of meeting Eric Bogatin at a IEEE EMC Society Symposium many years ago.
Attached is a great video from him that discusses signal integrity and his philosophies and approaches to PCB design.
Eric says "Just because it worked in the last few designs does not mean it was BECAUSE of what you did. .. It could be in-spite of what you did."
As for poorly laid out PCBs include all 2 layer Microbees and the S100 bus.
The Microbee has no signal return pins (aka GND) on the left coreboard connector and the S100 Bus originally had 2 but then upgraded to only 5 signal return pins.
Bear in mind that PCB technology in the mid 1970's to early 1980's limited PCB traces to be about 12mil (thousandths of an inch) min to be economically viable.
Enjoy!
Attached is a great video from him that discusses signal integrity and his philosophies and approaches to PCB design.
Eric says "Just because it worked in the last few designs does not mean it was BECAUSE of what you did. .. It could be in-spite of what you did."
As for poorly laid out PCBs include all 2 layer Microbees and the S100 bus.
The Microbee has no signal return pins (aka GND) on the left coreboard connector and the S100 Bus originally had 2 but then upgraded to only 5 signal return pins.
Bear in mind that PCB technology in the mid 1970's to early 1980's limited PCB traces to be about 12mil (thousandths of an inch) min to be economically viable.
Enjoy!