g:vhdl source code
https://onlinelibrary.wiley.com/doi/pdf/10.1002/9780470041956.app3
http://www.bogdanst.com/
http://www.bogdanst.com/grad-phd-student.html

p147 Sense Amplifier
https://repository.tudelft.nl/islandora/object/uuid:c434368a-9a67-45de-a66f-f5dc30430e03/datastream/OBJ/download