Nathan M. Neihart

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State-of-the art neural recording systems require electronics allowing for transcutaneous, bidirectional data transfer. As these circuits will be implanted near the brain, they must be small and low power. We have developed micropower integrated circuits for recovering clock and data signals over a transcutaneous power link. The data recovery circuit(More)
— Dynamic spectrum access (DSA) is a promising approach for the more effective use of existing spectrum. Of fundamental importance to DSA is the need for fast and reliable spectrum sensing over a wide bandwidth. A model for two-stage sensing is described based on an analysis of the mean time to detect an idle channel. Simulation results show that it(More)
—A parallel, multi-resolution spectrum sensing technique that is amenable to multiple-antenna cognitive radios is introduced. We show that for energy-detector-type spectrum sensors, the total sensing time due to FFT latency is reduced by 100 times using the proposed method versus the fixed-resolution, serial detection method employed in single-antenna(More)
We present a low power FM transmitter for use in neural recording telemetry. The transmitter consists of a low noise biopotential amplifier and a voltage controlled oscillator used to transmit the amplified neural signals at a frequency of 433 MHz. The circuit is powered through a transcutaneous, inductive link. The power consumption of the transmitter is(More)
—A common material in creating memristors is titanium dioxide (TiO 2), grown by atomic layer deposition, sputtering , or sol-gel process. In this letter, we study the memristive behavior in thin TiO 2 films fabricated by brief electrochemical anodization of titanium. The effects of different anodization times and annealing are explored. We discover that(More)
Dual-frequency single-inductor multiple-output (DF-SIMO) power converter topology for SoC applications" Page Figure 1.1 A block diagram showing the typical powering scheme of low-power microcontrollers with a single-output buck converter for the digital core and linear regulators for all other modules .. Figure 3.2 The inductor current distribution process(More)