Input Filter Design for Switching Power Supplies: Written by Michele Sclocchi Michele.Sclocchi@nsc.com Application Engineer‚ National Semiconductor The design of a switching power supply has always been considered a kind of magic and art‚ for all the engineers that design one for the first time. Fortunately‚ today the market offers different tools that help the designers. National Semiconductor was the first company to offer the “Simple Switcher” software‚ and an on-line simulation tool
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Web Filters are too Restrictive at School Students everywhere are concerned that the web filters are too restrictive at their school. Every school has them‚ they’re the things that won’t let you access a website that you wish to visit. Web filters should not be allowed at school. When the students try to visit a website that is blocked or restricted‚ the restriction page comes up and does not allow access to that website. Except‚ there needs to be websites that students should be allowed to visit
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their behavior when excited by sinusoidal sources. First‚ the behavior of both RC and RLC circuits will be examined when driven by a sinusoidal source at a 3-1 given frequency. Subsequently‚ the frequency response of both a low-pass filter and a high-pass filter will be considered. 3.2 Objectives At the end of this experiment‚ the student will be able to: (1) Determine the steady-state behavior of linear circuits driven by sinusoidal sources‚ (2) Use the oscilloscope to measure the phase difference
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Chapter I Introduction: Nowadays‚ water filters are important because of our environment. Many kinds of pollution affects our environment of water‚ that’s why those who drink water were caught having diarrhea or are even malnutrition. Water filters are very expensive that’s why those who are unfortunate causes themselves a long time to use water filters they just use temporary water that came from the ground. Charcoal is a dark grey residue consisting of impure carbon obtained by removing
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1 A Voltage-Controlled Oscillator (VCO) is a circuit that provides a varying output signal (typically of square-wave or triangular-wave form) whose frequency can be adjusted over a range controlled by a dc voltage. An example of a VCO is the 566 IC unit‚ which contains circuitry to generate both squarewave and triangular-wave signals whose frequency is set by an external resistor and capacitor and then varied by an applied dc voltage. Figure (1) shows that the 566 contains current sources to charge
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BSNL TTA Question Paper: Network Filters and Transmission Lines Exam Name: TTA (Telecom Technical Assistant) Specialization: Section C - Network Filters and Transmission Lines Conducted By: BSNL (Bharat Sanchar Nigam Limited) Conducted In: December 2007 Number of Questions: 50 Maximum Marks: 250 Time Allowed: 90 Minutes Negative Marking: Yes Type of Questions: Objective Type (Multiple Choice) Section (Network Filters and Transmission Lines) 1. Pick up wrong statement (a) A group of interconnected
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circuit is the signal at the ANALOG INPUT socket is sampled at a rate‚ and for duration‚ which depends on the applied sampling control signal. Then fourth is the second order low pass filter this is a filter having a 3.4 kHz bandwidth. Then lastly is the fourth order low pass filter is similar to the Second Order Low Pass Filter but has a steeper cut off gradient (represented by the graph on the board). CONCLUSION MODICOM 1 incorporates and on-board waveform generator that can be selected to provide
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formaldehyde. Gerbera Daisies and Chrysanthemums were found to be effective in the removal of benzene‚ a known carcinogen. As a rule of thumb‚ allow one houseplant per 100 square feet of living area. The more vigorous the plant‚ the more air it can filter. Keep in mind that plants will not do much to alleviate tobacco smoke or dust in the air. Aglaonema sp. Chinese Evergreen Aloe barbabensis Aloe Vera‚ Burn plant Chlorophytum comosum Spider Plants Chrysanthemum sp. Mums Dieffenbachia sp
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Arbitrary waveform generator using FPGA supervised by Prof.Dr.Mohy El Din Abo Elsoud ‚ Dr.mohamed Saber 1 Acknowledgments Thanks to Allah first and foremost : We would like to extend a special thanks to Prof . Mohy Eldin Abo Elsoud and Dr.Mohamed saber our supervisors ‚ For their continuous Support ‚ They guided us through all of our work ‚ Also were very patient in hearing our problems ‚ They always provided us with easy ‚ yet creative solutions for any road blocks . we ran into We have learnt
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figure below demonstrates this step: Mathematically‚ this is expressed as the following: The resultant waveform can be demodulated by multiplying the modulated signal by the carrier signal of the same frequency and then using the low pass filter to filter out the remaining frequencies to get the frequency required. In terms of the frequency domain‚ the following figure shows the effect of DSB-SC modulation The effect of the demodulation process in frequency domain: b) AsAccos2πfstcos2πfct=AsAc2(cosfs+fc2πt+cos(fs-fc2πt))
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