Frequency-based multiplexing technique for high density recording of electrodes

Stanford researchers have designed a frequency-multiplexed neural probe architecture that enables massive scaling of electrophysiological recording from neurons.

Multiplexing of many electrodes for brain neuron sensing is extremely difficult due to the requirement of using very little physical space. An array of "oscillatrodes" (oscillator-under-electrodes) are distributed along a probe and the outputs are coupled and transmitted using a single wire to overcome the space limitation. One application is for brain machine interface (BMI) to help paralysis patients regain functionality for improved quality of life.

A 65-nm CMOS prototype including eight ring oscillators has been implemented for study and characterization.

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Figure Description: Frequency-multiplexed neural probe using oscillatrodes.

Stage of Development: