Details

Autor(en) / Beteiligte

• Seong-Jin Kim
• Lei Liu
• Lei Yao
• Wang Ling Goh
• Yuan Gao
• Minkyu Je

Titel

A 0.5-V sub-μW/channel neural recording IC with delta-modulation-based spike detection

Ist Teil von

• 2014 IEEE Asian Solid-State Circuits Conference (A-SSCC), 2014, p.189-192

Ort / Verlag

IEEE

Erscheinungsjahr

2014

Quelle

IEEE Electronic Library Online

Beschreibungen/Notizen

• A neural recording IC with a new spike detection scheme is proposed to minimize power dissipation while preserving the waveform information of the detected spikes. A delta modulator is employed in the recording IC to reduce signal dynamic range and enable low-voltage operation. A series of output values from the delta modulator are stored in a small amount of analog memory to extract two key features of the neural signal - amplitude and frequency, which are used for accurate spike detection. Using the stored delta values, the precise spike waveform information can be conserved. A prototype recording IC with 16 channels has been fabricated using 0.18-μm CMOS technology. Measurement results demonstrate the spike detection capability successfully. The fabricated IC consumes only 0.88 μW/channel at 0.5-V supply.