A 15.2-enob continuous-time ΔΣ adc for a 7.3 µW 200mvpp-linear-input-range neural recording front-end
- Resource Type
- Conference
- Authors
- Chandrakumar, Hariprasad; Markovic, Dejan
- Source
- 2018 IEEE International Solid-State Circuits Conference - (ISSCC) Solid-State Circuits Conference - (ISSCC), 2018 IEEE International. :232-234 Feb, 2018
- Subject
- Components, Circuits, Devices and Systems
Power demand
Linearity
Distortion
Impedance
Gain
Distortion measurement
Neuromodulation
- Language
- ISSN
- 2376-8606
Closed-loop neuromodulation with simultaneous stimulation and sensing is desired to advance deep brain stimulation (DBS) therapies. However, stimulation generates large artifacts (∼100mV) at the recording sites that saturate traditional front-ends. We present a 15.2b-ENOB CT ΔΣΜ with 187dB FOM, which along with an 8x-gain capacitively coupled chopper instrumentation amplifier (CCIA), realizes a front-end that can digitize neural signals (1GΩ and high-pass (HP) cutoff