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Suppose that the input voltage to an amplifier has a peak amplitude of 100mVand contains components with frequencies ranging from 1 to 10 kHz. We want the output voltage waveform to be nearly identical to that of the input except with larger amplitude (by a factor of 100) and possibly delayed in time. Based on this information, what specifications can you make for the amplifier?
Developing secret codes has interested people for centuries. A simple coding scheme can be developed by replacing each character in a text file by another character that is a fixed number of positions away in the collating sequence.
Consider the two-pole two-phase induction motor having two windings displaced 90° in space shown in Figure.The fields produced by the windings are given by Ba = Kia(t) cos(θ ) and Bb = Kib(t) cos( θ-90°). The two-phase source produces currents giv..
A circuit has a Thevenin equivalent circuit consisting of a voltage source of 10 V and an output resistance of 20 O. A non-ideal voltmeter is used to measure the source voltage. What will be the measured voltage if the voltmeter has an input resis..
Collecting and focusing sunlight and using the focused beam to heat a fluid is an old idea, and as the environmental costs of fossil fuel combustion mount, solar heating becomes an increasingly attractive alternative.
What is the expected return for a that has $200 in stock A with an expected return of 15%, $300 in stock B with an expected return of 10%, and $500 in stock C with an expected return of 25%?
A source connected to the primary winding supplies an impedance load connected to the secondary winding. The load absorbs 15 kVA at 0.8 p.f. lagging when the load voltage is 118 V. Assume that the transformer is ideal and calculate the following
One side of the transformer bank is connected to a 120-kV transmission line, and the other side is connected to a three-phase load of 10 MVA at 13.2kV and 0.8 lagging power factor. Using the base in the tranmission line of 120-kV and 20 MVA.
In a digital audio system, a digital to analog converter reproduces the analog voltage levels represented by the digital samples. This signal is inherently jagged with sharp transitions between each sample.
two identical CE amplifiers are connected in cascade. The first stage is fed with a source eVsig having a resistance Rsig= 10k ohms. A load resistance Rl=10K ohms and is connected to the collector of the 2nd stage.
For a resistor, what resistance corresponds to a short circuit? For an uncharged capacitor, what value of capacitance corresponds to a short circuit? Explain your answers. Repeat for an open circuit.
A small buck converter has 24 V input and 12 V output. The transistot has Rds(on) = 0.1 Ohms. The diode is modelled as a 1 V drop. Each device has Rtheta(ja) = 40 K/W and Tjucntion
A phase modulation (PM) signal s(t) has a modulating wave m(t) = Amcos(2ðfmt) and phase sensitivity kp = 10 radians/V. What would be the modulating signal if the same signal s(t) is generated by frequency modulation (FM) with frequency sensitivity..
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