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A linear-in-dB CMOS variable gain amplifier (VGA) targeting a low power read channel front-end is presented. Biased with a less than 2 mA current, this VGA provides 6-18 dB amplification and more than 700 MHz 3-dB bandwidth with less than -45 dB THD in 0.18-mum CMOS. In addition, the 6-18 dB gain is continuously tunable by adjusting the bias current. With such a performance trade-off, it is well suited...
This paper proposed a multi-scale prediction model for short-term electric load, which makes merit of wavelet decomposition and different local approximation algorithm in reconstructed phase space. The load series are non-stationary, observed from a chaotic dynamical system. With the view of wavelet multi-resolution analysis, the original load series are decomposed with A Trous algorithm into a relatively...
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