Ultra-low-power high-accuracy neural recording ASIC

Ultra-low-power high-accuracy neural recording ASIC

This ASIC can measure the response of the brain after a neural stimulation. Since the neural stimulation requires signals in a higher voltage range, this architecture has an artefact reduction on-chip to cancel out the primary pulse. Focus of the design is on ultra-low-power and high-accuracy neural recording. The design is compliant to ISO13485.

Features

  • Application: Spinal cord stimulation, deep brain stimulation, …
  • Neural recording during stimulation with artefact cancellation
    • Ultra-low-power AFE of <40uA per channel
    • Wide input range, low-noise (uVRMS) recording channels
    • LNA with uVRMS noise-level and uA current consumption
    • 15-bit low-power ADC (dual-cyclic pipelined architecture)
  • Simultaneous signal processing of multiple recording channels:
    • Digital artefact cancellation (based on LMS filter)
    • Programmable band pass filters (incl. down-sampling)
    • Hilbert Transformation incl. up-sampling, delay correction for signal correlation and dedicated CORDIC
    • Oscilloscope mode (with parallel interface to stream data)
  • Digital test features: JTAG, boundary scan, MBIST for memories
  • 0.18u technology
pdf

Want to develop your own ASIC ?