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Consider a power-output stage with voltage gain A1=1, an input signal Vs=1V, and a hum Vn of 1V. Assume that this power stage is preceded by a small-signal stage with gain A2 =100V/V and that overall feedback with β=1 is applied. If Vs and Vn remain unchanged, find the signal and noise voltages at the output and hence the improvement in S/N.
What device can be used to connect to data bus with enable/disable capability. When all these kind of devices tied to the bus are disabled, what logic level is on the bus line.
Male frogs give calls that attract female frogs to approach and mate. Researchers examined mating calls of closely related tree frogs in South America. If reinforcement of postzygotic isolation is occurring
A plane wave is obliquelyincident on a perfectly conducting half-space. The magnetic field is perpendicular to the plane ofincidence. The incident E has an amplitude of1V/m,and the incident angle is θi. a. Write the fields in each region.
a certain shunt motor armature has a resistance of 0.07 and a current of 50 amperes at 120 volts. determine the counter emf
For a coaxial line with inner conductor radius a and outerconductor radius b, V = V0 at ρ = a and V = 0 atρ = b. Find the potential distribution by solving Laplace'sequation. Also find capacitance per unit length.
An iron core of cross-sectional area 200 square mm and length 320mm is evenly wound with a coil of 100 turns. When a current of 0.35A flows in the coil, a magnetic flux density of 0.12T is set up in the iron core.
Consider the circuit as shown below. If Vin peak voltage = 12V, Calculate the output voltage Vo. Open loop voltage gain of the Operational Amplifier A=10,000. The voltage drop across the diode is 0.7 V.
What is the cross price elasticity of demand between XYZ's and AB C's widgets?
An angle-modulated signal with carrier frequency ωc=2πx106 is described by the equation φEM(t)=10cos(ωct + 0.1sin2000πt). a) Find the power of the modulated signal. b) Find the frequency deviation Δf. c) Find the phase deviation Δφ.
The forward-bias current in a GaAs pn-junction at T = 300 K is ID = 15 mA. The reverse-saturation current is IS = 10^-19 A. Determine the required forward-bias diode voltage.
a. What are the cyclic frequency (in Hz) and period of this signal b. Express this signal in the Quadrature and Sine/Angle forms. c. Express this signal in terms of complex exponentials (hint - use Euler's identity equation).
Why then do we even use JFETs as amplifiers What is it that make them attractive even though they are non-linear? How do we minimize the effect of their non-linearity
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