Calendar

Switched Capacitor Based Micro-Stimulator
Hossein Aghababa

In this presentation a circuit for neural stimulation is described. This circuit works on the basis of charging and discharging a series of capacitors. All the capacitors in this circuit are charged up with a definite logic meaning that the maximum voltage is adjustable by the physician. This way, the amount of charge injected to the tissue is controlled.

All the capacitors are charged after each other. This circuit is implemented in AMI05-μm process using two layers of metals and occupies 0.5 mm2. The simulation results are given in this paper.

Low Power Analog Bidirectional Spike Detector
Jingzhen Hu and Vinayak Devasthali

Extracellular neural recording has become increasingly important in neuroprosthetic applications. In this project, we have designed a low power spike detector circuit that detects both positive and negative spikes. The detector includes amplification, filtering and measurement of spike amplitude and pulse width to facilitate spike-sorting and data reduction.

Design Of Intraocular Pressure Sensor Interface Circuitry
Ajit Gopalakrishnan, Srinivas Jasti, and Pradeep Silva

Glaucoma is the second leading causes of blindness without precursory warnings and the leading cause of preventable blindness. Variation in Intraocular Pressure (IOP) is one of the key indicators in the development of Glaucoma. There is a need for a need for the design of integrated implantable sensors that can be used for long-term monitoring of IOP.

Low-power CMOS circuits powered by wireless RF telemetry are required for interfacing with these sensors. We have designed a CMOS signal conditioning circuit for an intraocular pressure sensor that allows wireless communication with an external data-logging system.