Vahideh Sadat Sadeghi

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Frequency synthesizer is one of the most challenging blocks in wireless transceivers which works as a local oscillator in both receiver and transmitter blocks. It is generally based on charge pump based phase-locked loops structure. This paper describes the new application of fast charge pump based PLL architecture. The PLL uses a bang-bang frequency(More)
Speeding up a synthesizer's locking process can be considered as speeding up the charge pump PLL. Several methods have been introduced to increase the speed of the locking process. One way to achieve fast locking is to use a bang-bang frequency comparator (BBFC) in the feed-trough path to achieve a faster locking process. In this paper, we present a(More)
Speech recognition techniques have been developed dramatically in recent years. Nevertheless, errors caused by environmental noise are still a serious problem in recognition. Employing algorithms to detect and follow the motion of lips have been widely used to improve the performance of speech recognition algorithms. This paper presents a novel technique to(More)
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