Questions on Electrical Engineering Lab II - Exam 1 | EE 4113, Exams of Electrical and Electronics Engineering

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4. Recall that the Project 1 specifications call for: (A) Less than 24B ripple between 200 and 6000Hz relative to the passband maximum, (B) At least 30dB of attenuation at 25Hz relative to the passband maximum. (C) At least 304B of attenuation at 50kHz relative to the passband maximum The circuit was tested and the following measurements were made: « The maximum output voltage between 200 and 6000Hz is 2Vpp. © The minimum output voltage between 200 and 6000Hz is 1.5Vpp. © The output voltage at 25Hz is 50mVpp. The output voltage at 50kHz is 80mVpp Answer the following questions. Show calculations that justify your answe (a) (2 points) Has specification A been met? (c) (2 points) Has specification C been met? 7. (2 points) Consider the Class-A amplifier sketched below. A PSpice simulation was run in order to estimate the efficiency of the amplifier. Use the two PSpice plots below to estimate the percentage efficiency of the amp. VDD ro} RD 18 R2 c2 1.8k 4 Vout 100uF C1 M1 RL WH Vin 5 20 ve 470F InFS10" | VOFF =0 = VAMPL. q 0 FREQ = 1k Ri 1k c3 s RS 470uF 68 7 Re =1 6 1S tt ~1aw. SELD> foreebeowrefonent ~20wL— 8 AVG (W(VI)) soomw. ; 250mW. ow. os sms 10ms 15m 20m 25me 30m 8 AVG (WIRL))