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This paper describes development and testing of the measurement system designed for a purpose of monitoring the heat flow, as well as humidity penetration in structures based on innovative building materials. At the beginning, the novel building materials and techniques, including nanotechnology-based ones are briefly presented, then vision of the structure monitoring system is described. Next, details...
The fractional Fourier transform (FRFT) is a generalization of the well-known Fourier transform. The FRFT depends on an order parameter a and can be interpreted as an a-th power of the ordinary Fourier transform operator. This tool has found widespread applications in areas such as optics, wave propagation analysis, signal and image processing, solving of differential equations, mechanical vibrations...
This paper describes design and construction of a laser projector. Laser projectors are perfect for displaying graphics that need to catch our attention. In this paper we present the novel approach to animation which can later displayed by the self-made laser projector. The laser projector presented in paper is composed of galvanometer mirrors, green laser, microcontroller and a dedicated software...
The authors present an implementation technique of a novel system which can be used to perform 3-D filtering for separable kernels. The structure, consisting of Givens rotations and delay elements, is implemented in FPGA chip. Givens rotations are based on a pipeline CORDIC algorithm. Presented approach is tested against finite precision noise and sensitivity to structure parameters. It is shown that...
The first galvanometer motors were developed at the beginning of 20th century. However, due to various design limitations, initially they were mainly used as indicating or recording devices. Later, after new construction concepts were introduced, it become possible to use them for other more advanced purposes. They have become a very important element of various precise positioning systems, where...
A practical way for the realisation of LC VCOs is presented. The design plan takes frequency and power constraints as input parameters, uses available inductor, varactor and transistor models for basic simulations and delivers a dimensioned circuit. Both, low phase noise and low power design fundamentals are respected, as well as NMOS-, PMOS- and CMOS transistor cores can be used. The design plan...
The objective of this paper it to present a work concerning a proposed design and development of an analog Pulse Width Modulation (PWM) Application Specific Integrated Circuit (ASIC) with built-in analogue control loop and PWM for DC/DC power converters used in space applications. The described circuit can be used in avionics, aerospace devices and vehicles. The paper presents the general requirements...
Reversible logic circuits are one of the solutions to the problem of conventional microelectronic technology reaching its limits. Unfortunately, efficient reversible system design requires different approaches than conventional solutions; the current methods of reversible function synthesis have certain limitations, including their complexity and scalability. This paper presents the application of...
Lab-on-chips (LOCs) are small systems, which integrate, in the same device, several functions involving chemical analysis with bio-processing functionalities typically performed in a laboratory. As a consequence, it is a multi-domain system that can be described and designed with VHDL-AMS, a hardware description language that natively supports electronics, thermics and fluidics. On the other hand,...
In this paper, it is shown that a description of mildly nonlinear circuits with an operator o introduced in a paper entitled “Distortion in variable-capacitance diodes” by R. G. Meyer and M. L. Stephens is not correct. The error occurring in this article was then replicated in publications of Palumbo and Pennisi on harmonic distortion calculation in integrated CMOS amplifiers, and recently in a paper...
This paper presents the Finite Difference Method solution of Dual-Phase-Lag heat transfer model appropriate for a thin one-dimensional problems with a heat flux heating on the one side and a fixed reference temperature on the other side. The simulation results are shortly compared with Fourier-Kirchhoff heat equation model.
Research and development in life sciences domain brings every day many innovations. Some of them have been enabled (or improved) by the micro-electronics. Several examples are described in this paper. A big challenge in the design of such systems is that the biological part cannot be uncoupled from the rest of the system during the design process. The integration of biological parts in system's design...
In this paper design of critical building blocks of a 10 GHz silicon integrated circuit of an FMCW radar transceiver is reported. Specifically, design of VCO and LNA is discussed. The targeted transceiver structure will be world's first, commercially available silicon integrated circuit built in SiGe BiCMOS technology and dedicated for low-power radar applications.
A stable reference voltage (or current) source is a standard component of today's microelectronics systems. In particle physics experiments such reference is needed in spite of harsh ionizing radiation conditions, i.e. doses exceeding 100 Mrads and fluences above 1e15 n/cm2. After such radiation load a bandgap reference using standard p-n junction of bipolar transistor does not work properly. Instead...
The design of a 450nW bandgap temperature sensor in the 0 to 175°C range is presented. The design demonstrates a leakage current compensation technique that is useful for low-power designs where transistor performance is limited. The technique mitigates the effects of leakage in Brokaw bandgap references by limiting the amount of excess current that is entering the bases of the main bipolar pair due...
This paper presents a sixth-order IF polyphase band-pass filter design in 28 nm FD-SOI technology. This filter has been synthesized from a low-pass Butterworth filter prototype. The filter's bandwidth is 1.2 MHz and its center frequency is 2 MHz. A calibration technique using back-gate biasing that is available in fully depleted SOI to minimize the mismatch impact, has been also described. The two...
This paper introduces a design independent extension to RTL-to-GDS design-flows for seamless insertion of timing-detection flip-flops at critical paths of a digital CMOS standard-cell circuit. It is possible to detect timing-errors for general purposes at any critical path including enable-inputs of clock-gating cells with typically 15% area overhead for 20% endpoint coverage while maintaining DFT...
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