A Wireless Headstage Based on a 32-Channel Neuromodulator Integrated Circuit

This article presents a wireless neuromodulation headstage prototype intended for in-vitro recording and stimulation in freely behaving mice. The prototype allows independent stimulation on 32 channels and can record up to 32channels in the local field potential (LFP) band, while the simultaneous recording in the action potential (AP) band is limited to 3 channels when data is not compressed. All recorded data is directly streamed via Bluetooth Low Energy (BLE), enabling immediate analysis during the experiment. The small size of 20x24 x8 mm and a low total weight of 3.9g makes this neurologger suitable to be used on small rodents such as mice. A moderate power consumption of 29.3mW for 32channel recording and transmission of LFP band data ensures a long uninterrupted operation of almost 5hours.