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The input to the oscilloscope can be modeled as a 1 [M Ohm] resistor in parallel with a capacitor in the range of about 20[pF]. When the scope probe is properly calibrated, it can be modeled as a 9[M Ohm] resistor in parallel with a capacitor having a capacitance l/9th that of the oscilloscope input capacitance. When you calibrate the probe, you are in fact adjusting the probe capacitance so that it has the correct value. If the scope probe is not properly calibrated, is an error introduced into your measurement? What is the nature of the error? Is there also an error in dc measurements made using the scope probe? Repeat the calculation of the output voltage of the circuit in Figure 1 assuming that the oscilloscope is connected to the circuit output. Repeat this calculation again assuming that the oscilloscope and the scope probe are connected to the circuit output. In which case is the circuit loading more of a problem? Why? Assume that the scope probe is connected to the oscilloscope. Calculate the impedance of the scope probe and oscilloscope combination at the terminals of the scope probe. Do this calculation for a signal frequency of 3 [kHz] and 10[kHz]. If the probe and oscilloscope were connected to a circuit output, for which frequency would the circuit loading be more of a problem? Why? Devise an experiment for determining the capacitance of an unmarked capacitor. Do not use time constant methods.
a carrier wave is frequency-modulated using a sinusoidal signal of frequency fm and amplitude Am. (a) determine the values of the modulation index beta for which the carrier component of the fm signal is reduced to zero. see the appendix for calcu..
Telephone channels and PCM analysis, The analog to digital converter (ADC) used in a telephone system outputs 8 bit words. The digital words are transmitted as a serial stream to form a PCM voice signal
Develop a voltage-to-current converter that satisfies the requirement I = 0.0021Vin. If the op amp saturation voltage is ±12 V and the maximum current delivery is 5 mA, find the maximum load resistance.
For a photovoltaic installation at latitude 30°N, you have the option to position the panels facing south at slope angles of 0°, 10°, 30°, or 90° to the horizontal plane. Determine the panel orientation you would choose to obtain maximum energy
(a) What is the tension in the coupling between the first car and the locomotive? (b) If this tension is equal to the maximum force the locomotive can exert on the train, what is the steepest grade up which the locomotive can pull the train at 25 ..
What value of emitter resistor would you choose, if: a) You have to amplify the signal of a microphone that has an internal resistance of 100K using a Common Emitter bias configuration b) you have to drive a load of 50 with an Emitter Follower cir..
Determine the battery voltage required to obtain a flux density of 1.2 T in the air gap. Use the magnetization curve.
Design a 4-bit circuit for 2s-complement, base on the formula below, using only inverters, 2 input AND gates and 2 input OR gates. Design your circuit to be as fast as possible. What is the worst-case propagation delay for this circuit
A PN junction has Na=10^19 cm^-3 and Nd= 10^16 cm^-3. a) with V=0 what are the minority carrier densities at the depletion region edges Assume V= 0.6 V for (b)-(d). b) What are the minority carrier densities at the depletion region edges
2) A device that responds to a small current or voltage change by activating a mechanical switch allowing a larger amount of current flow is 3) Where does a program transfer to when an interrupt occurs Interrupt vector table Interrupt service ro..
A DTMF signal with duration T seconds can be modeled as a sum of two cosine signals with frequencies frand fc, multiplied by a rectangle function. For example, the DTMF signal for "1" is g1(t) = rect (t/T) * [cos(2pi*687t)+cos(2pi*1209t)]
Explain the structure and nature of the ionosphere with reference to daily, seasonal and long-term changes and explain the modes of propagation of radio waves of different frequencies
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