R. Sarpeshkar

Publications195
h-index47
Citations9,389
Highly Influential Citations419
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An Energy-Efficient Micropower Neural Recording Amplifier
TLDR
The amplifier appears to be the lowest power and most energy-efficient neural recording amplifier reported to date and the low-noise design techniques that help the neural amplifier achieve input-referred noise that is near the theoretical limit of any amplifier using a differential pair as an input stage.
View on IEEE
Digital selection and analogue amplification coexist in a cortex-inspired silicon circuit
TLDR
The model of cortical processing is presented as an electronic circuit that emulates this hybrid operation, and so is able to perform computations that are similar to stimulus selection, gain modulation and spatiotemporal pattern generation in the neocortex.
View on Nature
Analog Versus Digital: Extrapolating from Electronics to Neurobiology
TLDR
The results suggest that it is likely that the brain computes in a hybrid fashion and that an underappreciated and important reason for the efficiency of the human brain, which consumes only 12 W, is the hybrid and distributed nature of its architecture.
View on MIT Press
Feedback Analysis and Design of RF Power Links for Low-Power Bionic Systems
TLDR
This paper presents a feedback-loop technique for analyzing and designing RF power links for transcutaneous bionic systems, i.e., between an external RF coil and an internal RF coil implanted inside the body, and proposes an optimal loading condition that maximizes the energy efficiency of the link.
View on IEEE
Low-Power CMOS Rectifier Design for RFID Applications
TLDR
The measured RF power-up threshold (in 0.18-mum, at 1 muW load) was 6 muWplusmn10%, closely matching the predicted value of 5.2 muW.
View on IEEE
Ultra Low Power Bioelectronics: Fundamentals, Biomedical Applications, and Bio-Inspired Systems
Part I. Foundations: Ten chapters lay a foundation in device physics, noise, and feedback systems including nano scales in a highly original fashion, emphasizing intuitive thinking. This foundation…
Synthetic analog computation in living cells
TLDR
It is demonstrated that synthetic analog gene circuits can be engineered to execute sophisticated computational functions in living cells using just three transcription factors, and can be composed to implement higher-order functions that are well described by both intricate biochemical models and simple mathematical functions.
View on Nature
A Low-Power Wide-Linear-Range Transconductance Amplifier
The linear range of approximately ±75mV of traditional subthreshold transconductance amplifiers istoo small for certain applications—for example, for filtersin electronic cochleas, where it is…
View on Springer
A Low-Power Wide-Dynamic-Range Analog VLSI Cochlea
Low-power wide-dynamic-range systems are extremely hard to build. The biological cochlea is one of the most awesome examples of such a system: It can sense sounds over 12 orders of magnitude in…
View on Springer
An Energy-Efficient, Adiabatic Electrode Stimulator With Inductive Energy Recycling and Feedback Current Regulation
TLDR
A novel energy-efficient electrode stimulator that combines the efficiency of voltage control and the safety and accuracy of current control in a single low-power integrated-circuit built in a standard .35 μm CMOS process is presented.
View on IEEE
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