early draft for group discussion.
reference carrier card: shuttle lx1, usb vita57 carrier
mezzanine contains: 4x intan tech rha2132, 4x analog devices ad7892,
power regulation, 128-chan omnetics to electrophys, vita57 expansion
connector to carrier.
Variable resistors to define lower and upper frequencies of the INTAN
band pass filter.
The headstage in this eval board is a reference design for how to
connect the Intan series multiplexing preamps to an analog devices adc