solutions sample test 3

solutions sample test 3 - ECE2OO Test #3 Summer 2005 Print...

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Unformatted text preview: ECE2OO Test #3 Summer 2005 Print Name K6 E By signing I am stating that I have taken this quiz in accordance With the NCSU honor code. Signature \} 1K9 1. For the circuit above, use the properties of an ideal op amp to find Vout. SMH d, \KJLT Vout NW 7/ 7/ \l O / / w r 30 1. 5K9 4K9 ./ 0 v <— Vout ZJmP‘ z, 2K9 3M9 4K9 + 0 ¢ 0 a 6K9 gm " 2K!) (9 pr IKQT 3 V _ Z 3 a“? 3 ‘l” 2V 3V _ O 2. Use the properties of an ideal op amp to find all the node voltages. “Vow = ZN + NEW : \ZV 0.5003(1000t) V 0_8V 3. Given the screen shot and the amplitude modulation process shown above: a. Determine the modulation index. l~5“‘3 __l__ l b m'l\_3+‘3 ’ I.(O" b. Determine the center frequency of the spectrum analyzer. c. Determine the frequency span of the spectrum analyzer. ‘SPC’Y‘ 9314* \K D QbK (1. Determine the power in the upper sideband. IQ Ktl-i 590k -4 x 1!] 4. Given the above amplitude modulated signal answer the questions below. a. Determine the frequency of the original modulating signal. ’F/wx; VT = léJm: b. Determine the carrier frequency. ¥c1l~§¥v¥m = “75' K‘HiL 0. Calculate the modulation index. L‘i’TL ItZ ll mg: C. [kl-«7; MO (1. Calculate the antenna length required to efficiently transmit this signal. Z 2 , .7 z I , 7 5. 000 e. Calculate the inductor value required to tune to this signal with a lnF capacitor. vm (t) = [l cos(27r1000t) + 2 cos(27r3000t) + 3 cos(27r5000t)] Volts 5. Given the amplitude modulation process is shown above. Vam (t) COS(27‘C 600,000t) a. Plot the magnitude spectrum of the am signal. A 1 2“ boo“; $3 «+- Qoskzrr Hog) + zQ—OECZW3KQ flown CbSQ )1: + 3 (OJKIWstB do“? % 5%" m (M S3 Qua) b. Determine the power in the carrier, upper sideband, and lower sideband. PC: 3 Z: P035:— Ptse; : L+ L+ l l q 1 /§ 4- /Z 4 /§> ‘ ADM bk) ...
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solutions sample test 3 - ECE2OO Test #3 Summer 2005 Print...

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