An n−channel MOSFET has parameters
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Microelectronics: Circuit Analysis and Design
- For an N = 12 mobile system, a 75 MHz bandwidth is available for forward channels, each of which is 200 MHz. (i) Calculate the value of k for this system (ii) How many simultaneous forward calls are possible. (iii) Determine what values of "i" and "j" would satisfy the N = 12 condition, and redraw in your answer scripts in a diagram with co-channels inserted/filled out (iv) If the radius of each cell is 15 km, what would be the co-channel reuse distance, D.arrow_forwardAn optical fiber link with a distance of 30km long has a loss of 0.3dB/km. a) Calculate the minimum optical power level that must be launched into the fiber to maintain an optical power level of 3.0W at the receiving end.b) Estimate the required input power if the fiber has a loss of 0.6dB/km.c) Differentiate, with the aid of diagrams, the types of these dispersions and its effect on the transmission distance. (i) Modal Dispersion(ii) Chromatic Dispersion(iii) Polarization Mode Dispersionarrow_forwardThe numerical input/output mean optical power ratio in a 1 km, length of optical fiber is found to be 2.5. Calculate the received mean optical power when a mean optical power of 1 mW is launched into a 5 km length of the fiber (assurning no joints or connectors).arrow_forward
- i) A communication system employs a continuous source. The channel noise is white and Gaussian. The bandwidth of the source output is 10 MHz and signal to noise power ratio at the receiver is 100. (a) Determine the channel capacity. (b) If the signal to noise ratio drops to 10, how much bandwidth is needed to achieve the same channel capacity as in (a). (c) If the bandwidth is decreased to 1 MHz, what S/N ratio is required to maintain the same channel capacity as in (a).arrow_forwardThe Governate of Dhofar is densely populated that are evenly distributed over an area of 1200 km2. It is given that a percent of the populace is subscribed to a cellular system. Assuming that the cellular system is an Erlang B system with a traffic Intensity per cell of 37 Erlangs, a total band of 40 MHz and full duplex channel bandwidth of 60 kHz. The system covers the city using hexagonal cells with a diameter of 8 km and a cluster size of 7 cells. Determine the total number of cells in the system, the number of channels per cell, the total number of channels in the system and the total clusters.arrow_forward3) The fidelity of a receiver is better if its RF and IF stages have more bandwidth. Select one: True Falsearrow_forward
- Design a rectangular microstrip patch antenna, based on the dominant mode, that can be mounted on the roof of a car to be used for satellite cellular telephone. The designed center frequency is 1.6 GHz, the dielectric constant of the substrate is 10.2 (i.e., RT/duroid), and the thickness of the substrate is 0.127 cm. Determine the (a) dimensions of the rectangular patch (in cm) (b) resonant input impedance, assuming no coupling between the two radiating slots (c) mutual conductance between the two radiating slots of the patch (d) resonant input impedance, taking into account coupling (e) position of the feed to match the patch antenna to a 75-ohm linearrow_forwardProblem 1 The transistor parameters for the given circuit are β = 100, VBE (on) = 0.7 V, and VA = ∞. Determine the midband gain AvM, corner frequencies fL and fH, and bandwidth BW of the given amplifier. Problem 2 Determine the corner frequencies and limiting horizontal asymptotes of a commonemitter amplifier with an emitter bypass capacitor. For the given circuit, RE = 4 kΩ, RC = 2 kΩ, RS = 0.5 kΩ, CE = 1 μF, V + = 5 V, and V − = −5 V. The transistor parameters are: β = 100, VBE(on) = 0.7 V, and ro = ∞.arrow_forwardAn extremely fast photodiode can be designed to achieve bandwidth of 158 GHz. Assuming that the bandwidth is limited by carrier transit time, calculate the required depletion region if the electron and hole saturation velocities = 0.85 x10^5ms-1. Express your answer in the unit of μm.arrow_forward
- a system whose closed-loop transfer function is given by G(s)=K/s(s^2+s+1)(s+2)+K derive a Routh-Hurwitz array to determine the stability of the system.arrow_forwardQ4 - Calculate the dissipation in power across 20Ω resistor for the FM signal, V(t)= 20 cos(6600 t+ 10 sin 2100 t), if a transmitter radiates a signal of 9.8KW after modulation and 8KW without modulation , Calculate the depth of modulation?arrow_forward1. Discuss in detail the construction of a Directional Coupler. 2. Discuss in detail whether the incident energy can be sampled or not with pick up probe at port ‘4’.arrow_forward
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