Doubling the speed, to 128Msps

A project log for un0rick - an ice40 ultrasound board

A hx4k lattice fpga based pulse echo board, yosys compatible

kelu124kelu124 08/14/2018 at 21:540 Comments

Breaking the wall of sound! un0rick can sample at 64Msps but ... one can offset the start of an acquisition by half a cycle. In practice, it means one can do two acquisitions, with one delayed by half a cycle, and interleave the two series. In practice: getting 128Msps acquisition speed!
In picture, it seems quite nice. The signal is loud and clear!

And notebook at . Some improvement on the lib too, not perfect yet but someday better!