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solutions sample test 2

# solutions sample test 2 - ECEZOO — 051 Test#2 Print Name...

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Unformatted text preview: ECEZOO — 051 Test #2 Print Name K e By signing I am stating that I have taken this quiz in accordance with the NCSU honor code. Signature ‘ 1. (10 points) For the voltage signal shown above, a. What voltage would be recorded on a voltmeter in the DC mode? IOQLB + (“33(2) to as VClC : I (p v? b. What voltage would be recorded on a voltmeter in the AC mode? 5 ‘00 ‘L Coca + 15kt) _ 250 t- 1943’ m L___._—-——-——-Q——"_"' — /(0 ‘ A?) I VKmsZ i jay/5 c. Calculate the power this signal would deliver to a ZKQ res1stor. i 135‘ P : VK‘“ /_5 MUG z KR, 2, 2. (10 points) Given the voltage and current signals above, a. Determine the RMS voltage. V P 5" /(; z "/6 \/ b.Determine the RMS current. I 7, P/JZ 7‘ /t b A c.Determine the power factor. P4 : (1)5117? d.Ca1culate the apparent power. 3 : yams—Jams : ’0/2" 3 EVA e. Calculate the real power. .__.. I 3 Wtwwgmmmwww r ‘° u} f i t r % ., ,. 3 ,5 ‘ . .. , ¢ , i ( t«%«VM.th§mwyw§«m§m§w . ”\ ié 3. (15 points) From the oscilloscope display (top signal) and power spectrum (bottom signal) of the signal above, a. Determine the fundamental frequency of the signal. 3 Vic/ﬁelds In JAWS 590 IT: n \ ~ 10 ~ /T- :. 1SKH% b. Find the frequency span used to display this spectrum. » S: _ x |/ é 'ldomoun % l P66” K. @ IDKH ’° Span/Q; JOKﬁé 0’0 £ ‘mQ ClOmCL\(\ c. Find the power in the 3rd harmonic in Watts (center screen is the offset). 3Pd hOWmomL <9 3* l'SK: \$3le _. h a, " P390 00 P5; W1. 4. (25 points) Given the signal: v(t) = —8 +10 cos(27z500t) — 6 cos(27r2000t — 7r / 4) A69 a. Plot the power spectrum in dBW. b. Calculate the power in the ﬁmdamental frequency in Watts. ”‘ C) — w gum“, €ng : Om Pr " c. Find the power in the 3rd harmonic in Watts. gé harm @ 3* 5730 l I (1. Find the total signal power (you may choose: Watts or dBW). 6. Calculate the signal to noise ratio (SNR) in dB if lmW noise is added to the signal. 510K: M3103 = S‘LZolﬁ 5. (20 points) /_/ N 63 5 \096/ a. Draw the transfer characteristics curve of an inverting ampliﬁer with a power gain of Gd}; = 40 dB powered by a single +8V power supply. ow/ L/Ociéiélo ’03 9" 8 8 VPPW) z. hog {IO / 0.7, .0”! b. Determine the output for an input signal vin(t) = 0.02cos100t V. Q99) 00 :— &C/ +-R\/ ( l 14 + '1 OOCCDZ) C05 100% ‘00 v0 14 + 2 (L03 Ltoot 1:?ij c. Calculate the maximum power this ampliﬁer can deliver to an 89 speaker assuming the DC term is eliminated. VPPCNT’ : % VPWT 1‘7, 0g , MGR/7Q {V\ )4 Li WM :- /«‘2: WW PMCJ» - : L) :— 1 UK) ’ x ' 8L 100 200 300 400 f(Hz) 6. (20 points) The frequency response of a low pass ﬁlter is shown above. a. Calculate the output voltage magnitude for at 2V DC input. 0-“ “ac 09 N 00 ;@v)L\o) -— ézov 6a?) b. Calculate the output voltage magnitude for an input Vin(t) = lOcos(27t3 000 V. 300“ *9/60; \04 03‘ a £05?) \0 ”’ , z 1 UT 50% /DO / a. ‘ 0. Determine the output for an input Vin(t) = [2 + lOcos(27t300t)] V. ’00 00 :):&o + co SQiTY 30%)] V d. Calculate the total signal power of the input Vin(t) = [2 + lOcos(27t300t)] V. PM: @ﬁ— Q‘OGJL: Ll gt‘ 50‘: 3mg ...
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