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In this paper a new approach is proposed for approximating Parks-McClellan low pass differentiators using low order IIR filters; indeed, proposed approach is a complement for Al-Alaoui's low pass differentiator design method; A suitable low-pass filter is cascaded with a wideband differentiator so that the overall transfer function yields digital IIR filter whose numerators represent linear phase...
In this paper a novel approach is proposed for approximating Parks-McClellan low-pass differentiators using optimized low-order IIR filters. Indeed, a suitable IIR filter is designed for approximating Parks- McClellan Low pass differentiator using modified Al-Alaoui's method, and then denominator polynomial coefficients of resulting transfer function optimized by Genetic algorithm. A suitable fitness...
In this paper a low power divide-by-two static frequency divider using GDI D flip-flop is proposed which uses only single clock phase. So, the timing problem of complementary clock signals is relaxed. This divider is simulated in a standard 0.18 mum CMOS process. Simulation results indicate that the proposed divider consumes, in the worst case, 3.74 mW power at 3.3 V supply voltage and maximum operating...
This paper presents an ultra high speed low current comparator with low input impedance using a simple biasing method. It is optimized for low power consumption whilst maintaining high speed. This novel comparator design offers a reduction in power consumption compared with other high speed designs. Simulation results demonstrate the propagation delay is about 0.7 nsec and the average power consumption...
We present a fast and high quality scanning system based on structured light. The technique is based on spatial neighborhood coding which has only a single pattern and can be applied on moving surfaces. A color grid pattern based upon De Bruijn sequences has been generated and applied. This system also uses a back propagation neural network for color correction. Experimental results using a prototype...
Unsupervised clustering is a powerful technique that can be used for distinguishing the real target from the false targets such as flares in the images formed by infrared sensors in missiles. The ISODATA is such an algorithm that could be used in infrared guided missiles detectors, since the algorithm itself computes the number of clusters or in other words the number of flares. Although the only...
In this paper, an imaging chip for acquiring range information with 0.35 mum CMOS technology and 5 V power supply has been described. The system can extract range information without any mechanical movement and all the signal processing is done on the chip. All of the image sensors and mixed-signal processors are integrated in the chip. The design range is 1.5 m-10 m with 18 scales.
The ever-growing demand to high-speed transmission of data has forced the designers to make faster and much more reliable circuits and systems for users. Among many of methodologies for data formats to be transmitted, the binary data is of great interest. There are various pulse code modulations (PCM) for transmission of binary data among which, non return to zero (NRZ) and return to zero (RZ) are...
Structured light is one of the most appropriate methods for 3D measurement and reconstruction. In this research, a new technique based on the spatial neighborhood coding has been used due to its single pattern feature and the possibility of applying to dynamic surfaces. A color grid pattern coded with De Bruijn sequences has been designed and applied. The implemented correspondence algorithm shows...
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