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Clearcly, any noise will pass straight through to the ADC subsystem, introducing measurement error. You have two choices to mitigate this: SW filtering and HW filtering. Either way around, you need a HW anti-aliasing (low pass) filter following the output.Assume the uC sample rate, Fs, is 100 Hz with 8 bit resolution.
1.what is the value of 1 LSB referred to 3 V ?
2.what is the maximum allowable (Nyquist) frequency FN your system can sample without aliasing ?
3.How much attenuation must your filter have in order to reject frequencies above Fs ? This annenuation is Amin (Hint: it is related to the value of 1 LSB)
4.what order must your filter be to achieve these goals if we pick Fo = Fs/4 (25 Hz) ? (-3db is Fo and your attenuation Amin occurs at Fs)
Assume that a transmitter on Earth must communicate with a spacecraft on the Moon. Parameters are: Earth-based atenna gain=40dB Lunar receiving atenna gain=20dB Distance=386,000 Km Frequency= 3GHz Minimum lunar signal level = 100fW
Use Laplace transform techniques to find the solution to the following differential equation given that x = 1/3 at t = 0.
Suppose we want to construct an amplifier with a closed-loop gain of 50. We want the gain to vary by no more than +/- 5% while the open-loop gain varies by +/- 50%. Determine the values for a and b that will satisfy these constraints.
1. Given R = 50Kohm and C = 100nF what is the frequency of oscillation 2. Given a required frequency of oscillation of f = 10kHz and R = 8kohm, what should the value of C be Calculate the signal to noise ratio given RMS Noise Voltage = 20mV and RMS S..
Consider a series RL circuit with a voltage source. Take the output as the voltage across the resistor with L = 2 henrys and R = 4 ohms. (a) Find the zero input response as a function of time. The initial current is 2 A.
Three two-input "AND" gates have their outputs connected to an "OR" gate. The first "AND" gate has each of its inputs at logic HIGH level. The second "AND" gate has each of it's inputs at logic LOW level.
The counter must stop at a value which is defined by using the 8 slide switches. Use the discrete LEDs as the output to validate the counter. The counter should run when a push button ‘run' is being pressed.
A receiver has a sensitivity of 0.3 µV. The same receiver can handle a signal level of 75 mV without overloading. The receiver has a blocking dynamic range of 80 dB. If the desired signal has a level of 10 µV
Transfer function in s t = [0-2*Ts : Ts : Tmax] ; Find the actual solution using the inverse laplace transform syms ycont ycont = ilaplace(Gs,t) Sampling times of 0.01, and simulation runs for 10 seconds
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
In transformer designs, often you can find an air gap in the core. In all the electric machines, there is an air gap between the stator and rotor. In both cases, flux will go through both core material and the air gap.
1.A liquid has an enthalpy of vaporization of 30.8 kJ/mol. At 275 K it has a vapor pressure of 117 mmHg. What is the normal boiling point of this liquid 2. In a certain mountain range, water boils at 94°C. What is the atmospheric pressure under the..
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