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A fabric produces two kind of products, the product one of red color and product two of green color. Before the quality control they arrive through a conveyor belt in a random way. Through a system of image recognition a piston drives a separator that passes from position one to position two depending on the product. The conveyor belt moves relatively slow therefore several seconds pass before the separator switches position. The piston moves two switches (N/A) when it is on position one or on position two. The control system requires a variable exit voltage between 25 and 10 volts. Design a circuit that performs this function.
Power Dissipation Problems, A signal generator outputs a sine wave signal with a frequency of 1000 Hz and an rms voltage of 20.0 V. The output of the spectrum analyzer is connected to a 200 ohm resistor.
Lets assume that one electron is removed from each atom and these electrons are all removed from the penny to a distance such that the force of attraction between the positively charged penny and the removed group of electrons is 2.3 N.
write a program that calculates the quadratic equation. the program should be able to compute imaginary numbers (i.e. sqrt(-1)). finally, output the tow result. hint: the computer cannot directly compute imaginary numbers
A uniformly doped abrupt pn junction (step junction) diode is fabricated. At room temperature 25% of the total space charge region (depletion region) is in the p-region. The built in potential is also measured to be 0.710V.
Using a 3-V power supply, design a version of the circuit of fig 6.62 from the book. to provide a dc emitter current of 0.5 mA and to allow a +-1-V signal swing at the collector. The BJT has a nominal B=100. Use standard 5 % resistor values
Find the propagation delay for a minimum-size inverter for which Kn' = 3 Kp' = 180 uA/V^2 , and (W/L)n = (W/L)p = 0.75 um/0.5 um , VDD = 3.3 V , Vtn = -Vtp = 0.7 V, and the capacitance is roughly 2
Draw the circuit daigram for the twisted - tail ( Jonhson) counter consisting of 4 Flip flops (A,B,C,D) with the following excitations: Da='Qe, Db=Qa,Dc=Qb,De=Qc.Assume the flip flop are cleared intially .
In a feedback system, the forward path has a transfer function of the form G(s)=k/(1+s/Omega_p) and the feedback path has a gain of k_fb which is less than unity. Calculate the bandwidth of the closed-loop transfer function
Write down the principle of energy conversion and give an example for single and double excited system.
Determine the minimum signal to noise ratio (s/n) in dB required in each communication channel to achieve a data rate of 270 kbps?
CdS photodetector is irradiated by light with wave-length of 450nm and intensity of 30Wm^-2. If the band gap of CdS is 2.4 eV and all electron-hole pairs are extracted without recombination. What is current density of this photodetector
a) At what time t1/2 have half the atoms decayed b) How many atoms have decayed at t = 40 ns c) Draw a graph of Nexc as a function of time. Show in the graph the lifetime, 1t1/2, 2t1/2, 3t1/2 and 4t1/2.
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