Concept explainers
A lossless LC circuit can be used to provide controlled oscillations to generate a controlled frequency for wireless communications. (a) Design an LC circuit with amplitude of 5 V and frequency of 400 kHz, where the largest possible inductor available is 400 nH. Now suppose that you have an undesired resistance of 0.2 mΩ in series with the LC oscillator. (b) Determine if, and how much, the frequency changes as a result of the resistance. (c) Determine the maximum time that the oscillator can run before the voltage amplitude decays to 4.8 V, and (d) determine the energy dissipation during this time period (it will be very useful to use software such as MATLAB for calculating the energy dissipation!).
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Chapter 9 Solutions
Loose Leaf for Engineering Circuit Analysis Format: Loose-leaf
- Assume that the voltage drop across the resistor, ER, is 78 V; the voltage drop across the capacitor, EC, is 104 V; and the circuit has a total impedance, Z, of 20 . The frequency of the AC voltage is 60 Hz. Find the missing values. ET ER78V EC104V IT IR IC Z20 R XC VA P VARSC PF Carrow_forwardAn AC circuit contains a 24 resistor, a 15.9-mH inductor, and a 13.3F capacitor connected in parallel. The circuit is connected to a 240-V, 400-Hz power supply. Find the following values. XL=XC=IR=AIL=AIC=AP=WVARsL=VARsC=IT=AVA=PF=%=arrow_forwardExample 4: Determine the Q waveform and compare it with the input waveform. Assume Q = 0 initially. Cik Cik Data Input Solution) Data Inpur Darrow_forward
- Problem 6: w- Calculate the voltage across the capacitor every 15 0.1 ms for one complete period of the input waveform. Then, use Multisim to sketch the 25 V (n capacitor waveform. Repeat the calculation and the simulation for a frequency of 2 kHzarrow_forwardPlease do asaparrow_forward10 V sine 90 kHz 1 kQ C1 1 nF 2. Using a Square function with 90,000 Hz in your function-generator, a 1000-ohm resistor, and a 1 nano-Farad capacitor, determine the charging time for the capacitor. Show your calculations and show the charging-discharge curve with an oscilloscope in TINKERCAD.arrow_forward
- Q6. Figure Q6 shows a modulated waveform v(t) in microvolts as a function of time t in nanoseconds. 25 50 75 100 125 150 175 200 225 250 50 40 40 30 30 20 20 10 10 -10 -10 -20 -20 -30 -30 -40 -40 -50 -50 250 25 50 75 100 125 150 175 200 225 time/ns Figure Q6: Modulated waveform (a) Describe the modulation scheme. (b) What are the values of the carrier frequency and the modulation frequency? (c) What is the value of the modulation index? (d) What is the transmission efficiency (ratio of modulated to total power) in this example? (e) Sketch the spectrum of this modulated waveform indicating the relative magnitudes of the various spectral components. (f) The modulating wave in this example is substituted with a square wave of 50% duty cycle and of fundamental frequency 1.0 MHz. Sketch the absolute value of the spec- trum of the modulated waveform indicating the frequencies and relative magnitudes of the sideband components. (g) Demodulation of this type of signal is usually accomplished…arrow_forward2. For the given circuit, sketch the waveforms for W, X and Y. EN CIk A A Q Y CIkarrow_forward1. is the decrease of voltage gain with frequency 2. the capacitance which effectively appears from input to output as the signal is applied is known asarrow_forward
- Since C = 47μF, RL = 1kW and Vs = 90 cos2000t in the given circuit, find the diode current in the one-time filling time range of the capacitancarrow_forwardsolve this pleasearrow_forwardFind the voltage across and the current through the capacitor both at =20μSec Please try some part in typing format...arrow_forward
- Delmar's Standard Textbook Of ElectricityElectrical EngineeringISBN:9781337900348Author:Stephen L. HermanPublisher:Cengage Learning