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—Subthreshold filters offer the low power and wide tunable range required for use in fully implantable bionic ears. The major design challenge that must be met is increasing the linear range. A capacitive-attenuation technique is presented and refined to allow the construction of wide-linear-range bandpass filters with greater than 1 pp swings. For a(More)
We report a programmable analog bionic ear (cochlear implant) processor in a 1.5-microm BiCMOS technology with a power consumption of 211 microW and 77-dB dynamic range of operation. The 9.58 mm x 9.23 mm processor chip runs on a 2.8 V supply and has a power consumption that is lower than state-of-the-art analog-to-digital (A/D)-then-DSP designs by a factor(More)
Continuous, real-time tracking of eye gaze is valuable in a variety of scenarios including hands-free interaction with the physical world, detection of unsafe behaviors, leveraging visual context for advertising, life logging, and others. While eye tracking is commonly used in clinical trials and user studies, it has not bridged the gap to everyday consumer(More)
Zebrafish are a useful vertebrate model for the study of development, behavior, disease and cancer. A major advantage of zebrafish is that large numbers of animals can be economically used for experimentation; however, high-throughput methods for imaging live adult zebrafish had not been developed. Here, we describe protocols for building a light-emitting(More)
We describe a 470pW 16-channel analog VLSI processor for bionic ears (cochlear implants) and portable speech-recognition front ends. The power consumption of the processor is kept at low levels through the use of subthreshold CMOS technology. Each channel is composed of a programmable bandpass filter, an envelope detector, and a logarithmic dual-slope(More)
A B S T R A C T Next-generation bionic ears or cochlear implants will be fully implanted inside the body of the patient and consequently have very stringent requirements on the power consumption used for signal processing. We describe a low-power programmable analog VLSI processing channel that implements bandpass filtering, envelope detection, logarithmic(More)
Fluorescence lifetime measurements are becoming increasingly important in chemical and biological research. Time-domain lifetime measurements offer fluorescence multiplexing and improved handling of interferers compared with the frequency-domain technique. In this paper, an all solid-state, filterless, and highly portable light-emitting-diode based(More)
This paper demonstrates the use of software radio techniques in the context of sensing, rather than communications. It describes code division multiplexing (CDMA) and time division multiplexing (TDMA) of a receiver channel in an Electric Field Sensing system. The only hardware used is a front end gain stage consisting of two opamps and a microcontroller.(More)
The human eye offers a fascinating window into an individual's health, cognitive attention, and decision making, but we lack the ability to continually measure these parameters in the natural environment. The challenges lie in: a) handling the complexity of continuous high-rate sensing from a camera and processing the image stream to estimate eye(More)