Based on the wavelet transform principle of nonlinear signal denoising , a design of fault signal denoising of permanent magnet linear synchronous motor vertical elevating system is presented using Digital Signal Processor(DSP) chip as its detecting and processing core . The experimental results show that the wavelet transform fault signal denoising applied to this system can not only preserve ...

A 0.5 V CMOS light-to-digital converter (LDC) based on a nonuniform quantizer and off-chip photodiode enables a photodiode bias current range spanning 4 nA to 3.5 A while consuming less than 4 W of power. Using an off-chip LED as a modulated light source, measurements with a photodiode current signal having modulation frequency of 1.2 Hz (72 beats per minute) and 0.5% peak-to-peak amplitude rel...

the mixed-signal circuits with both analog and digital blocks on a single chip have wide applications in communication and rf circuits. integrating these two blocks can cause serious problems especially in applications requiring fast digital circuits and high performance analog blocks. fast switching in digital blocks generates a noise which can be introduced to analog circuits by the common su...

A sine waveform signal generator for the on chip testing of mixed-signal circuits for speech processing is present. The idea behind is to attenuate the higher frequencies in a periodic triangular waveform. The hardware implementation is discussed. And the simulation results validate our proposal. This generator can be employed for both the digital BIST and the analog/mixed-signal BIST applicati...

For digital devices integrating an image-processing LSI, performance improvement, cost cutting and reduction of the time to market are essential conditions for surviving in the increasingly competitive global market. At the same time, more and more image-processing LSIs are taking the form of large-scale system-on-a-chip (SoC). It is becoming harder to design them as the degree of integration i...

Artificial neural network (ANN) has application in communication engineering in diverse areas such as channel equalization, channel modeling, error control code because of its capability of nonlinear processing, adaptability, and parallel processing. On the other hand, wavelet transform (WT) with both the time and the frequency resolution provides the exact representation of signal in both doma...

Systems on chip, by definition, unite a number of functions and occasionally, sensors or actuators, into a unified, compact, lower-power solution to a signal processing problem. Recent efforts have seen the research, development, and commercialization of systems on chip that are sufficiently programmable and flexible to address a wider variety of applications and signal processing problems than...

A mixed-signal image filtering VLSI has been developed aiming at real-time generation of edge-based image vectors for robust image recognition. A four-stage asynchronous median detection architecture based on analog digital mixed-signal circuits has been introduced to determine the threshold value of edge detection, the key processing parameter in vector generation. As a result, a fully seamles...

We describe a CMOS neural net chip with a reconfigurable network architecture. It contains 32,768 binary, programmable connections arranged in 256 'building block' neurons. Several 'building blocks' can be connected to form long neurons with up to 1024 binary connections or to form neurons with analog connections. Singleor multi-layer networks can be implemented with this chip. We have integrat...