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Let TSSB be the equivalent noise temperature of a mixer receiving a SSB signal, and TDSB be the temperature when it receives a DSB signal. Compute the output noise powers in each case, and show that TSSB = 2TDSB, and that therefore FSSB = 2FDSB. Assume that the conversion gains for the signal and its image are identical.
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Assume that the I bit for external hardware interrupt IRQ is enabled and is low-level triggered. Explain how this interrupt works when it is activated. How can we make sure that a single interrupt is not interpreted as multiple interrupts
An isolated 75MVA synchronous generator feeds its own load and operates initially at no-load at 3000 r.p.m., 50 Hz. A 20MW load is suddenly applied and the steam valves to the turbine start to open after 0.5 s due to the time-lag in the governor syst..
Rectifying a sinusoidal provides a way to create a dc source. In this problem we consider the Fourier series of the full wave and half wave rectified signals. The half wave rectified signal xf(t) has a period T0 = 1 and its period from 0 to 1is: x..
where Jn(β ) is the nth order Bessel function of the rst kind with argument β. Using Matlab, plot the magnitude spectrum of a single-tone FM signal |S(f)|.
A hollow sphere with inner and outer radii of R1 and R2, respectively, is covered with a layer of insulation having an outer radius of R3. Derive an expression for the rate of heat transfer through the insulated sphere in terms of the radii, the t..
The electric field in a certain region of space is given by the vector field E(r ) = E(x, y, z) = (x ? z)xˆ + (z ? y) yˆ V/m Find any two points P( x1 , y 1, z 1) and Q( x2 , y2 , z2 ) such that the electric field at P is perpendicular to the elec..
Lead resistance 3 ohms, load resistance varies from 0.3 up to 4 ohms. Calculate maximum power if voltage in is 9 volts
An n-channel JFET needs a NEGATIVE voltage applied to its GATE, relative to its SOURCE. If you have a single POSITIVE supply applied to the MASTER loop of a JFET, the mid point of the voltage divider will also be a positive voltage
A cylindrical specimen of cold-worked steel has a Brinell hardness of 250.
Show how a switch and resistor can be used to create a logic level 1 or 0 for a digital input circuit. Obtain a data sheet for a Passive Infra Red Detector and show how it can be configured to provide a logic level 1 when it detects the presence of a..
A line charge of infinite lenght lies along the z axis and carries a uniform linear charge density of ρl C/m. A perfectly conducting cylindrical shell, whose axis is the z axis, surrounds the line charge.
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