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A method that replaces the temporal partial differential operators ∂n/∂tn of a partial differential equation (PDE) with Laplace domain impedances sn is proposed for realizing analog circuits that solve the wave equation. A systolic array of analog circuit modules is employed to simulate electromagnetic wave propagation. Mathematical models and corresponding analog circuits are described for internal...
Impedance spectroscopy is a powerful technique that can be employed to determine the physical properties of different materials. In principle the technique can be implemented in the time domain using pulsed signal excitation rather than sweeping across frequencies. The advantage is particularly apparent when the measuring instrument is either traveling through the material medium rapidly, as in the...
The advancing trend to autonomous driving tightens the requirements for automotive microcontrollers with embedded flash memories. High reliability and low latency demands however have prevented the broad usage of multilevel-cell flash in this sector so far. This paper describes a robust time-domain voltage sensing scheme tackling the challenges arising from these tight conditions. A dynamic voltage...
Pulse-width modulation (PWM) has been extensively used in switched converter systems, and recently in RF applications, due to an increased interest in all-digital transmitters. These architectures employ high efficiency switched-mode power amplifiers (SMPA), where PWM is commonly used to generate the PA driving signal. However, digitally implemented PWM introduces large amount of in-band distortion,...
A new Time Domain Impedance Probe (TDIP) is presented in this paper. The new instrument is able to make measurements of absolute electron density and electron neutral collision frequency in the ionosphere at temporal and spatial resolutions not previously attained. A single measurement is made in 100 microseconds, which yields an instantaneous spatial resolution of 0.1 meters for sounding rocket experiments...
This paper presents a new switched capacitor based ring quantizer circuit. The circuit is inspired from a ring amplifier with some important modifications to enable time based quantization instead of amplification. The proposed quantizer which is a natural extension of the ring amplifier can be employed as a multi bit quantizer in pipelined analogue-to-digital converter and delta-sigma-modulators...
Data-state decision feedback equalizers (DFEs) suffer from a fundamental drawback of deteriorating vertical eye-opening when consecutive 1s or 0s are present in data. To combat this, a new data-transition adaptive DFE termed data-transition DFE is proposed. We show that data-transition DFE does not reduce vertical eye-opening whereas data-state DFE shrinks vertical eye-opening when consecutive 1s...
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