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A GSM cellular telephone system operates at a downlink frequency of 935-960 MHz, with a channel bandwidth of 200 kHz, and a base station that transmits with an EIRP of 20 W. The mobile receiver has an antenna with a gain of 0 dBi and a noise temperature of 450 K, and the receiver has a noise figure of 8 dB. Find the maximum operating range if the required minimum SNR at the output of the receiver is 10 dB, and a link margin of 30 dB is required to account for propagation into vehicles, buildings, and urban areas
An acb sequence balance three -phase Y-connected sourcefeeds a delta-connected load through a distribution line having animpedance of 1+j3 Ω. the load impedance of 117-j99 Ω. Thesource voltage in b -phase is 20
A square cross section, air filled toroid has Inner radius 12 cm. outer radius 14 cm. and thickness 2 cm. How many turns are required to produce an inductance of 1 mH
Design an amplifier circuit that will selectively amplify dolphin social conversations. The microphone can be modeled as a sinusoidal voltage source with peak amplitude less than 15 mV in series with a 1 ohm resistor.
Two very thin concentric rings lies in the xy-plane with their centers at the origin. The outer ring has a current of 1.5 A in the +uφ direction and has a radius of 50 cms. The inner ring has a radius of 30 cms. The magnetic field at the point (0,..
A sensorless brushless DC motor control with back emf (zero crossing point ) technique, using Arduino Microcontroller board control and describe
A circuit consists of two impedances, Z1=20/_30 ,Z2=14.14/_-45 , in parallel, supplied by a sourcevoltage V=100/_60. Determine the power triangle for each of the impedances and for the source.
A Y-connected three phase supply has a balanced voltages of 110e^j0, 110e^(j2/3) and , 110e^(j4/3). The corresponding impedances on the Y-connected load are 30, 30+j40 and 40+j30 ohm.
For the closed-loop system with plant model and controller given by G(s) = (s2+81)/(s2(s2 + 100)) D(s) = (K (S+1))/(S+13) (a) Find the locus of the closed-loop roots (poles) with respect to K;
The number of turns in the primary and secondary windings of a transformer are 80 and 20 respectively. The reluctance of the core is 64x10^3 A/Wb . The primary is connected to a voltage source, Vpri(t) = 170 sin (377t) V
The concentration of B at the surface of the Si is maintained at a constant level of 1.0 x 1025 m-3; furthermore, it is assumed that the concentration of B in the original Si material is negligible, and that at room temperature the boron atoms are..
Imagine we discharge this capacitor by connecting its plates with a wire of resistance R.
Design I/O wiring to control forward and reverse 12Vdc motor using PLC OMRON CJ1M. Consider that the forward movement of the motor will be controlled by a forward button and the reverse movement of the motor will be controlled by a reverse button
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