...t Name: | Alfredo C. Del Junco | Date: | 01/31/2014 | ET 1410 Exam 2 1. In a zero-level detector, the output changes state when the input __________. a. is positive b. is negative c. crosses zero d. has a zero rate of change 2. The zero-level detector is one application of a_________. a. comparator b. differentiator c. summing amplifier d. diode 3. Noise on the input of a comparator can cause the output to_________. a. hang up in one state b. go to zero c. change back and forth erratically between two states d. produce the amplified noise signal 4. The effects of noise in a comparator circuit can be reduced by_________. a. using negative feedback b. using positive feedback c. using hysteresis d. answers (b) and (c) 5. A comparator with hysteresis_________. a. has one trigger point b. has two trigger points c. has a variable trigger point d. is like a magnetic circuit 6. A window comparator detects when_________. a. the input is between two specified limits b. the input is not changing c. the input is changing too fast d. the amount of light exceeds a certain value 7. If the voltage gain for each input of a summing amplifier with a 4.7 kΩ feedback resistor is unity, the input resistors must have a value of_________. a. 4.7 kΩ b. 4.7 kΩ divided by the number of inputs c. 4.7 kΩ times the number of inputs d. Unity gain cannot be achieved...
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...Instructions: * Complete Part 1 of Lab 3. Once you have completed Lab 3-Part 1, complete the Lab Report. * Answer the questions and transcribe/transfer test results recorded in the lab’s tables to the tables provided. * Complete Part 2 of Lab 3. Once you have completed Lab 3-Part 2, complete the Lab Report. * Answer the questions and transcribe/transfer test results recorded in the lab’s tables to the tables provided. * Complete Part 3 of Lab 3. Once you have completed Lab 3-Part 3, complete the Lab Report. * Answer the questions and transcribe/transfer test results recorded in the lab’s tables to the tables provided. ------------------------------------------------- Part 1- Comparators and the Schmitt Trigger Theory: 1. What is the purpose of a comparator? A comparator is a switching device that provides a high or low output depending on which of the inputs is bigger. 2. What type of circuit uses hysteresis to avoid rapid switching due to noise? Schmitt Trigger Preparation: 3. Describe the transfer curve of a basic comparator circuit. The horizontal axis represents the input and the vertical axis represents the output Test Procedure: 4. Transcribe the comparator waveforms from Plot 22-1 to the Plot below. Plot 22-1: Comparator waveform 5. Describe how the threshold voltage changes the comparator output. As V+ increases, the output pulse width decreases. When V- decreases, the output pulse width increases...
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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...
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