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# Lab3

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ET1410 - Module 2 - Homework Wk3
Due: Beginning of Class Week 4 Student Name: _________________________
Instructions: This is a homework assignment that covers Week 3 of our ET1410 class. You should neatly show your steps in the middle column, and provide your final answer in the right hand column. NEATNESS COUNTS. You must work in pencil, not pen.

Must include units of measure in your answer!!! If no units, or incorrect units, points will be deducted.

ProblemNo. | Your Solution | Final Answer (Restate Your Final Answer Here) | 1 | The upper critical frequency of an op-amp’s open-loop response is 200 Hz. If the midrange gain is 175,000 what is: (a) ideal gain at 200 Hz? (b) the actual gain? (c) The op-amps open loop bandwidth? | (a)____________(b)____________(c)____________ | 2 | Determine the attenuation of an RC lag network with fc = 12 kHz for each of the following frequencies. (a) 1 kHz (b) 5 kHz (c) 12 kHz (d) 20 kHz (e) 100 kHz | (a)____________(b)____________(c)____________(d)____________(e)____________ | 3 | Determine the phase shift through the network at a frequency of 2 kHz: | | 4 | Determine the phase shift through the network at a frequency of 2 kHz: | | 5 | Determine the phase shift through the network at a frequency of 2 kHz: | | 6 | A certain op-amp has three internal amplifier stages with midrange gains of 30dB, 40dB, and 20dB. Each stage also has a critical frequency associated with it as follows: fc1= 600Hz, fc2 =50kHz, and fc3 = 200kHz. (a) What is the midrange open-loop gain of the op-amp, expressed in dB? (b) What is the total phase shift through the amplifier, including inversion, when the signal is 10 kHz? | | 7 | A certain amplifier has an open-loop gain in midrange of 180,000 and an open-loop critical frequency of 1500 Hz. If the attenuation of the feedback path is 0.015, what is the closed-loop bandwidth? | | 8 | Find the value of Rf that will produce a closed loop gain of 8. | | 9 | Find the value of Rf that will produce a closed loop gain of -75. | | 10 | If a signal voltage of 10 mVrms is applied to the ampliﬁer, what is the output voltage and what is the phase relationship to the input? | | 11 | For the ampliﬁer determine the closed-loop gain and bandwidth. Open-loop gain is 125 dB and unity-gain bandwidth is 2.8 MHz. | | 12 | For the ampliﬁer determine the closed-loop gain and bandwidth. Open-loop gain is 125 dB and unity-gain bandwidth is 2.8 MHz. | | 13 | For the ampliﬁer determine the closed-loop gain and bandwidth. Open-loop gain is 125 dB and unity-gain bandwidth is 2.8 MHz. | | 14 | For the ampliﬁer determine the closed-loop gain and bandwidth. Open-loop gain is 125 dB and unity-gain bandwidth is 2.8 MHz. | |

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