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The audio frequency range of the bottlenose dolphin extends from approximately 250 Hz to 150 kHz. Frequencies between 250 Hz and ~ 50 kHz are thought to be used primarily in social communications, and "clicks" with frequencies above ~ 40 kHz are believed to be primarily used in echolocation.
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. The voltage delivered to the 1 kilo ohm resistor earphone should peak at approximately 1 V.
if the equation for a mesh current is done and the current comes out negative, with the assumed clockwise direction. does that mean that the current is actually going in the opposite direction
If you were the operator for an squirrel cage induction machine, what options could you consider to control speed Describe and mention pluses and minuses of each.
An FM transmitter delivers to a 75 ohm antenna a signal voltage of \(V(t)=1000 sin(10^9t+4sin10^4t)\) Determine: (a)Carrier frequency (b) Intelligence frequency (c) Modulation index
A selective-repeat (SR) data link layer protocol uses 4 sequence bits to number it's frames. The source, C starts from frame 0 and proceeds following the Sr protocol. Let us start analyzing the frame/ACK transmissions when the first outstanding fr..
A voltage source with voltage Vs = V0 sin(pi*t) is driving a load of RL = 100 Ohms. The load is connected to the source by a transmission line with characteristic impedance Z0 = 50 Ohms. The velocity of propagation on the line is 2 108 m/s.
Design a circuit to provided a positive voltage whose magnitude is equal to the acceleration (revolutions pre minute) of the wheel. Assume the velocity sensor's output 1 mV/rpm, and the wheel rotates at less than 3500rpm.
A single-phase overhead transmission line consists of two solid aluminum conductors having a radius of 2.5 cm, with a spacing 3.6m between centers. a)Determine the total line inductance in mH/m.
Calculate the de Broglie wavelength of the following: A proton with kinetic energy of 1 M eV.
A shunt-connected a DC motor has zero rotational losses and R A = 0. Assume that R A and R adj is constant [except in part (d)] and that is directly proportion to feild current. For VT= 200 V and P out = 2 hp.
Two generators are connected in parallel to the same bus bar and each has an inductive reactance of 10% on rating. Generator 1 is rated 2,500 kVA and 2.4 kV, and generator 2 is rated 5,000 kVA and 2.4 kV.
A car battery has an open-terminal voltage of 12 V and an internal resistance of 0.02 . If the car starter has a resistance of 0.10 in series with the batter, what is the resulting terminal voltage on the starter
A radio link receiver has a signal sensitivity of 100 milliwatt. The SNR required is at least 14 dB. Which is the maximum noise allowed in the receiver.
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