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The following topics are dealt with: analog modeling; biomedical circuits; biomedical systems; RF LNA; analog filters; DSP; data converters; digital architectures; FPGA; RF oscillators; voltage reference; signal processing; sensors; test IC; RF power amplifiers; image processing; RF passive components; high level circuits; multipliers; adders; dividers; decoding algorithm; image coding; analog telecom;...
As the chip dimensions increase with chip complexity, interconnects tend to get longer. With the longer on-chip interconnects coupled with a decrease in wire width and wire separation, inductive coupling effects have become non-negligible. Analytical modelling expressions for the estimation of the noise peak voltage of the victim line under worst-case crosstalk noise effect are presented.
This work reports a new implementation of a transistor model aiming to facilitate a closer understanding of nonlinear elements in silicon CMOS transistors operating at high frequencies. Using this model, the contribution of each non linear element to the total distortion of the transistor can be individually quantified using a superposition method. The new model is implemented entirely using symbolically...
A new cyclostationarity-based analytical model for noise analysis of a charge amplifier followed by a correlated double sampling (CDS) circuit is proposed. It determines output noise (power spectral density and squared voltage) resulting from input noise voltages and currents. Model validation is performed by comparing the obtained results with those of temporal noise simulations. This model allows...
This paper presents a general model for the analysis of time-delay contributions due to right half plane (RHP) zeros in circuit's transfer functions. The presence of these RHP zeros is in general associated to Miller capacitances. These can be explored as a means of implementation of delay elements. A general discussion on the usage of these RHP zeros as means of designing usable delay cells is addressed,...
The paper deals with a non-traditional method for determination of sensitivities of voltage and/or current waves propagating down multiconductor transmission lines (MTLs). The main idea is to use a two-dimensional Laplace transform (2D-LT) to replace the originally partial differential equations describing the uniform MTLs in the (x, t)-domain with those of algebraic type in the (q, s)-domain. The...
This article introduces a frequency-controlled transcutaneous energy transfer system as well as a particular circuit structure for it. The analysis method, design and realization of this system are studied and its performance evaluation based on the simulations and experimental results of a prototype circuit is carried out. The simplicity of the required hardware as well as the high performance and...
This paper concerns the design of an integrated circuit (IC) dedicated to monitor electrode-tissues contact (ETC). It is the main module of an implantable telemetry device. This device allows one to apply various principles of electrochemical system's studies, such as cyclic voltammetry, electrochemical impedance spectroscopy, galvanostatic double pulse method, and thus, to measure the evolution of...
This paper presents novel approaches for higher-resolution, higher output gain, better-linearity, and less-power-consumption micro-stimulator array. To achieve higher output gain for more ideal stimulus current without extra cascode stage, a gain-boosting design is adopted. To achieve higher-resolution and better linearity, a continuous pulse-width modulation-based conversion architecture has been...
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