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Defaults:Ambient temperature TA = 25oC. 40Wpower transistor with TJMAX = 225oC, cooled by‘tophat' heat sink with θCA = 5oC/W.
An ideal class-B amplifier is required for a RL = 5Ω load.
(a) Using the default power transistors, determine the minimum supply rail voltage required if TJ < 105oC is required.
(b) If the supply rail voltage VS = (+-) 12V what is the minimum allowed load resistance RL and maximum power that these transistors (asconstrained) can deliver to the load?
Three amplifiers with power gains of 15, 22 and 7 ate cascaded. The input power is 120 micro-W. What is the output power of the final amplifier stage
Calculate the probability of drawing 3 10 k resistors from a box of 500 resistors, where 495 are 100 k resistors and 5 are 10 k . Use your results from part (a) and (e) to find this probability. How many ways are there to draw 3 resistors from a bo..
A sinusoidal voltage has a maximum value of 100V, and the value is 10V at t=0. The period is T=1ms. Determine v(t)
Calculate Is and the current I for V = 700 mV for a pn junction for which Na = 1017 / cm³, Nd = 1016 / cm³, A = 200 µm², ni = 1.5 x 10^10 / cm³, Lp = 5 µm, Ln = 10 µm, Dp = 10 cm² / s, and Dn = 18 cm² / s
Write the VHDL code implementing a 6-bit synchronous counter with enable. The design should include the output to be connected to the next stage Then update the code to include an asynchronous reset.
A MOSFET is used in a boost-buck converter. The on-state loss is 4.2 W, and the switching loss is 2.8 W. The device is in TO-220 heat-sink package. it is desired to avoid a heat sink, and a parallel connection has been suggested.
if a 2.000Å (.2nm) photon interacts with the bound electron in an hydrogen atom (binding energy 13.6 eV) with a Compton collision. The electron moves forward in the same direction as the incident photon. It may be convenient to use hc 12408eV
2 coils are 80% magnetically coupled for a magnetic system. Suppose that coil 1 is excited by AC voltage V1=200 v with current I1=1 A, all in rms values at 60Hz, while coil 2 is open and receives an induced voltage V2 = 50 v in rms.
Charges +Q and +3Q are seperated by a distance 2m. A third charge is located such that the electrostatic system is in equilibrium. Find the location and the value of the third charger in terms of Q.
Two slits produce fringes on a screen that is at a distance of 2.05 m from the slits. When the wavelength is 608 nm, the fringTwo slits produce fringes on a screen that is at a distance of 2.05 m from the slits. When the wavelength is 608 nm, the f..
How many turns are required for a circular loop of 100-mm radius to develop a peak emf of 10mV if the loop rotates 30r/s in the earth's magnetic field Take B = 60E-6T.
A 3-phase transmission line series load of 2000MVA, .8 p.f. lag at 735 kv. The ABCD parameters of the line are : A = .8746 =D, B = j128.33Ω, C = j.0018315 (s). Calculate Vs, Is, voltage regulation and efficiency of the line.
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