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A mixed-mode analog-digital transposed 64-tap finite impulse response filter for multi-channel biomedical monitoring systems is presented. The presented architecture conducts multiplication in analog domain by taking advantage of a compact preceding multiplying-ΔΣ ADC, which is implemented by reusing the in-channel current-mode stimulating DAC. The analog domain multiplication results in a ×16.4 saving...
This paper proposes implementing an antenna operating in the millimeter wave band of 56–64 GHz on the backside of an Integrated Circuit (IC) that uses Through Silicon Via (TSV) technology for a System in Package (SiP) approach to mixed signal design. A folded monopole antenna that utilizes a coaxial TSV feed line is selected to implement the design on the backside of the silicon die. Furthermore,...
Ferroelectric RAM (FRAM) is a non-volatile memory with fast, low power, high endurance, read and write operations. Hence, this technology remains an attractive choice for embedded system solutions. In this paper, we analyze Si data that initiated the effort to design a compensated Sense Amplifier (SA) with improved input offset-sigma. We evaluate the cost vs benefit tradeoffs associated with this...
We present a comprehensive photonic approach for passive cooling of solar cells by simultaneously performing radiative cooling while also selectively utilizing the sunlight. We design a photonic cooler made of multilayer dielectric stack that can strongly radiate heat through its thermal radiation while also significantly reflecting the solar spectrum in sub-band gap and ultraviolet regime. We show...
Photovoltaic (PV) technology development is dominated by the largest application, utility-scale energy generation. Although military PV applications share some of the same attributes as those for utility-scale PV, the Navy PV technology development is focused on filling the gaps between what exists for utility energy generation and specific military applications. In this paper, we discuss the unique...
Compact behavioral models for silicon photonic Mach-Zehnder modulators (MZM) are developed for SPICE compatible electro-optical co-simulation. The model captures electro-optical interactions and dynamics, optical insertion loss and thermo-optical effect. Behavioral model simulation results and measurement results are shown to be a highly match. The model will be an indispensable part of the optical...
Electronic interfaces to the nervous system are increasingly important for experimental neuroscience as well as medical diagnostics and therapies. Existing neural interfaces are limited, however, by the use of passive recording and stimulation devices that are connected to active electronics on separate physical platforms through large amounts of passive wiring. This manuscript proposes a new approach...
PAM4 modulation is currently being implemented in high-speed wireline communication standards in order to increase bandwidth density. This paper presents a transmitter which utilizes a low-area silicon microring resonator modulator with two separate phase shifter segments to realize high-speed PAM4 modulation with an optical DAC approach. The optical DAC is designed with an optimized MSB/LSB segment...
This paper describes two approaches to increase the energy efficiency of on-chip terahertz (THz) integrated circuits and systems. First, we present designs of multi-functional electromagnetic structures that utilize mode orthogonality and near-field interference to achieve simultaneous oscillation, harmonic generation, signal filtering and radiation. This leads to ultracompact THz circuits with low...
This paper makes a comparison between various quasi-delay-insensitive (QDI) asynchronous ripple carry adders (RCAs) realized using a delay-insensitive dual-rail code which correspond to 4-phase return-to-zero (RTZ) and 4-phase return-to-one (RTO) handshaking. The QDI RCAs considered are 32-bits in size and correspond to a variety of timing regimes viz. strong-indication, weak-indication, early output,...
Almost all electronic circuits require a reference, be it voltage, current, or time. A well-designed reference is expected to provide a “stable” point that will be independent of the potential variations in its operating conditions. While there has been decades of extensive amount of creative work in the world of reference design, with the emergence of new applications, reference designers are now...
When supplied well and with little power losses, multifunctional microsystems can add life- and cost-saving intelligence to hospitals, factories, and cars. Unfortunately, fitting the multiple power supplies that diverse subsystems require into millimeters is challenging. One reason for this is, although efficient and therefore necessary, inductors are bulky. And supplying several outputs with one...
In this paper, we explain the THz detection mechanism in sub-threshold Si MOSFETs by exploiting the exponential dependence of channel electron density to the gate-source voltage. According to our theory, this high frequency non-linear dependence is the underlying mechanism for rectification of THz radiation. The maximum detection frequency is limited by dielectric relaxation time of the electrons...
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