A design approach is described to achieve spectral blocking filters of any spectral width and optical density for narrow blocking bands. The ratio of the thickness of the high-index material to the low-index material in the layer pairs is adjusted to obtain the desired bandwidth in the first-harmonic reflection band. The number of layer pairs is adjusted to provide the required optical density....

potential fields are due to complex distribution of sources related to susceptibility and mass density variations for magnetic and gravity field respectively. in researching the lateral heterogeneous of different geological bodies, in particular their edge location potential field has some advantages. we mainly refer to linear features such as fault, folding axis, dyke, trend and border of the ...

This paper analyses two schemes of single-stage diode-switched active filters used in new switching power supplies designs to improve the power factor. From the point of view of the power flow, the distortion reduction is based on the improvement of the power conversion processes. Most of the ca/cc switching power supplies consists of two separated parts: a rectifier – in most cases a diode bri...

this paper presents an innovative active power filter design method to simultaneously compensate the current harmonics and reactive power of a nonlinear load. the power filter integrates a passive power filter which is a rl low-pass filter placed in series with the load, and an active power filter which comprises an rl in series with an igbt based voltage source converter. the filter is assumed...

Enhancing single-channel speech corrupted by wind noise has proven to be a difficult topic due to the complex characteristics of wind noise. Methods that assume a stationary or quasistationary noise source are ineffective against wind noise due to its nonstationarity and unpredictability. In contrast, the new method proposed works by finding the elements of the signal that are speech-like and s...

The 7th-order Bessel filter presented in this paper has an edge frequency that is continuously tunable from 4.5 MHz up to 10 MHz. It was fabricated with the 0.6-micron CMOS process by AMS, covers a chip area of 0.24 mm2, and consumes 49 mW from a 3.3-V supply. The SNR at −40 dB of harmonic distortion is between 48 dB and 50 dB over the whole tuning range. The comparatively low power consumption...