In this article, we study feedback linearization problems for nonlinear differential-algebraic control systems (DACSs). We consider two kinds of equivalences, namely, external equivalence, which is defined (locally) on the whole generalized state space, and internal locally maximal controlled invariant submanifold (i.e., set where solutions exist). define a notion called explicitation with driv...

A new power-efficient, reconfigurable, 6-order continuous-time bandpass delta-sigma modulator architecture is presented. A new duty-cycle-controlled DAC halves the number of DACs in the modulator, and also enables the center frequency to be reconfigurable. A prototype 800MS/s modulator achieves 69dB SNDR with a 25MHz bandwidth at a 200MHz IF. The center frequency can be varied from 180MHz to 22...

Stability analysis of high-order delta-sigma loops is a challenge. In this work, a novel design criterion is presented for error-feedback DACs which are especially suitable for high-speed operation. This criterion allows the design of unconditionally stable, robust, high-order delta-sigma DACs. Both analytical and numerical analysis are performed for verification. Total Pages (including 2 docum...

A common architecture here unifies ordinary scalar deltasigma modulators, vector I/O delta-sigma modulators (including parallel banks of scalar ones), mismatch-shaping DACs, delta-sigma modulators incorporating mismatchshaping DACs in the conventional way, and something new: scalar or vector delta-sigma modulators incorporating spectral shaping of hardware mismatches as a natural and integral p...

This paper presents a six-bit current-steering digital-to-analogue converter (DAC), which optimises the spurious free dynamic range (SFDR) performance of high-speed binary weighted architectures by lowering current switch distortion and reducing the clock feedthrough effect. A novel current source cell is implemented that comprises heterojunction bipolar transistor current switches, negative-ch...

The dielectrophoresis (DEP) phenomenon is used to separate platelets directly from diluted whole blood in microfluidic channels. By exploiting the fact that platelets are the smallest cell type in blood, we utilize the DEP-activated cell sorter (DACS) device to perform size-based fractionation of blood samples and continuously enrich the platelets in a label-free manner. Cytometry analysis reve...

Publish/subscribe is considered one of the most important interaction styles for the explosive market of enterprise application integration. Producers publish information on a software bus and consumers subscribe to the information they want to receive from that bus. The decoupling nature of the interaction between the publishers and the subscribers is not only important for enterprise computin...

We study the problem of downlink beamforming for the Weighted Sum Rate maximization (WSR) of MultiUser Multiple-Input-Single-Output systems with low-resolution Digital-to-Analog Converters (DACs) in a single-cell setup. The DACs, modeled as quantizers, are performing a nonlinear operation on the signals and are linearized using Bussgang decomposition and a linear approximation of the covariance...

1. ABSTRACT New waveform requirements are pushing the limits of traditional modem design techniques. Fortunately, modern Digital-to-Analog Converter (DAC) and Analog-to-Digital Converter (ADC) can achieve sampling rates in the GHz range. These new DACs and ADCs allow designers to directly synthesize channels that have bandwidths of more than 500 MHz+; allowing either wideband or multi-channel m...