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For the circuit in Figure 7.72, the transistor parameters are:
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Microelectronics: Circuit Analysis and Design
- What is the maximum average output power of a single-sideband signal (SSB) transmitter rated at 250 W peak envelope power (PEP)? Warrow_forwardHow many channels are available in the 2.4 GHz band? List all the channels. What is the channelbandwidth?arrow_forwardGiven the following CA configurations:A) CA_42AB) CA_4A_6BQuestions:1) Identify the CA type, duplex type, theoretical maximum bandwidth, and maximum numberof CCs for each CA configuration.2) If the CA_4A_6B has maximum bandwidth of 30 MHz, what are possible frequencyassignments for this CA configuration?arrow_forward
- 2. A system is being designed to use a 30 GHZ link with a 300HZ bandwidth to receive signals from a navigation spacecraft at an altitude of 20,200km, with a maximum slant range of 24,700km. The satellite transmitter-antenna gain is 25db and the handheld unit receiver gain is 5db. The transmitter power will be 18W. If the handheld receiver temperature is 500K, will this be an effective link (S/N at least 10 or 10db)? If not, what could you change to improve the link?arrow_forwardq/A given AM (DSB – LC) transmitter develops an unmodulated power outputof 1 kW. Across 50Ω resistive load. When a sinusoidal test tone with a peakamplitude of 5? is applied to the input of the modulator, it is found that thespectral line for each sideband in the magnitude spectrum for the output is 40%of the carrier line. Determine the following quantities in the output signal:a-The modulation index.b-The peak amplitude of the lower sideband.c-The ratio of total sideband power to carrier power.d-The total output power.e-The total average power in thr output if the peak amplitude of the modulationsinusoid is reduced to 4 volt.arrow_forward4. short answers a. What is the effective antenna area of an antenna at 2500 MHz, if the gain is 13 dBi. b. For a WCDMA handset with 7 dB noise figure and 5 MHz effective noise bandwidth, calculate the noise floor in dBm. c. An NBA basketball player is close to 2 meters tall, and an “Umpa-Lumpa” from the movie “Willie Wonka” is 0.5 meters tall. Assuming 2-ray propagation model, what is the ratio of the signal strength received by the two people? d. Consider a 12-km microwave link with 15 meter towers at both ends, calculate the minimum frequency in GHz, such the first Fresnel zone does not intersect the ground? Assume that the ground is flat between the towers.arrow_forward
- 5. The following data is available: fc= carrier frequency = 750kHz, Ac= maximum amplitude of the unmodulated carrier = 10V fm= modulator frequency = 300Hz-8kHz modulation index m=0.5 a) What is the frequency of the upper sideband? b) What is the frequency of the lower sideband? c) What is the amplitude of the modulating signal? d) What is the maximum amplitude of the envelope of the modulated signal? e) What is the minimum amplitude of the envelope of the modulated signal? f) What is the bandwidth of the modulated wave? g) Write an expression for the modulated wavearrow_forwardAn FM transmitter is determined to have a transmitter sensitivity of 498.716Hz/V. If the modulating signal is designed to be 15.998V, and the modulation index is kept to be at 1.5, solve for the highest upper sideband frequency in MHz considering that the carrier signal has a frequency equal to 172.255MHz.arrow_forward1. Which system has the best projected BER? 2. An earth station satellite transmitter has an HPA with a rated saturated output power of 10,000 W. The back-off ratio is 6 dB, the branching loss is 2 dB, the feeder loss is 4 dB, and the antenna gain is 40 dB. Determine the actual radiated power and the EIRP.arrow_forward
- 1.Select the correct statement(s) regarding frequency modulation (FM) bandwidth. a. the more the carrier frequency is allowed to change frequencies (Δf), the smaller the modulated signal bandwidth b. the larger the FM index, β, the larger the modulated signal bandwidth c. as you increase kvco, you decrease modulated signal bandwidth d. all statements are correct 2. Select the correct statement(s) regarding baseband signal modulation. a. with modulation, a baseband signal can be moved to a higher frequency thus preventing baseband signal interference b. modulation techniques are only required for analog information signals, since digital signals are represented by discrete logical values of “1” and “0” c. modulation eliminates the baseband signal’s frequency bandwidth, thus enabling greater efficiencies when transmitting a modulated carrier signal d. all statements are correct 3. A…arrow_forwardamplitude value of output voltage (Vout) = ?? Note1 : E-MOSFET output empedance rd= 70kΩ Note2: capacitors are of negligible size at midband frequency Note3 : 5kHz in midband frequencyarrow_forward1. A 1500-kHz carrier and kHz intelligence signal are combined in a nonlin-ear device. List all the frequency components produced. *2. If a 1500-kHz radio wave is modulated by a 2-kHz sine-wave tone, what frequencies are contained in the modulated wave (the actual AM signal)? *3. If a carrier is amplitude-modulated, what causes the sideband frequencies? *4. What determines the bandwidth of emission for an AM transmission? *10. What are some of the possible results of overmodulation? *11. An unmodulated carrier is 300 V p-p. Calculate %m when its maximum p-p value reaches 400, 500, and 600 V. (33.3%, 66.7%, 100%) 12. If V and V as shown in Figure 8, determine %m. (53.85%) 13. Determine and from Problem 12. ( Vpk, Vpk)arrow_forward
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