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Download Homework set no 3 - Department of Applied Engineering
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California University of Pennsylvania Department of Applied Engineering & Technology Electrical/ Computer Engineering Technology EET 215: Intro. To Instrumentation Homework Set No. 3 Due date: 10/05/2011 Individual work Name: Signature and date: / Learning Outcomes: A- To demonstrate the ability to solve and design OP-AMP comparator circuits B- To demonstrate the ability to solve and design inverting and noninverting amplifier circuits. Questions: For all circuits, assume the following: a±Vsupply = ±15𝑉 b741 op-amp is used cAOL = 200,000 dVd = V+ - VA123- Comparators Name the five basic terminals of an op-amp Draw the op-amp electronic symbol and label its five basic terminals What do the following symbols stand for? SMT, DIP, PIN 4- The part no. LM741C, what does LM stand for? 5- What does the C stand for in No. 4? 6- Write the equation describing the output when an op-amp is used as a comparator. ( in terms of AOL, and Vd 7- Determine Vo for: a) b) c) 8- V+ = 2.00V, V- = 1.998V V+ = 1.996V, V- = 2.000V V+ = 2.00V, V- = 1.999998V In the circuit shown, sketch Vin and Vo vs. time and Vo vs. Vin Vo + Vin LM741CN 10kΩ - Vin is a 2Vpk sine wave at 100Hz. 9- In the circuit shown, sketch Vin and Vo vs. time and Vo vs. Vin Vo Vin + 1V LM741CN 10kΩ - 10- B- Design a noninverting voltage level detector to have VUT = 6V and VLT = 2V and: a- Draw the circuit with the component values shown b- Determine the hysteresis voltage (VH) c- Sketch Vin and Vo vs. time if Vin is a 9V pk triangular waveform at a frequency of 100 Hz. Inverting and noninverting amplifier 1Design an inverting amplifier to have a voltage gain of -15. Draw the circuit and show component values 2Assume an inverting amplifier with Rf = 100KΩ, Ri = 25KΩ, RL (load resistance) of 10KΩ and aVin = 2V bVin = 2V Calculate Iout and Vout. 3Sketch Vin and Vo vs. time in the circuit shown. Assume Vin is a 3Vpk triangular waveform at 100 Hz. 40kΩ 20kΩ 1.5 V 10kΩ Vo + Vin LM741CN 10kΩ 4Design an inverting adder so that Vo= -5(V1 + V2 + V3 +V4). Where V1 , V2 , V3 and V4 are arbitrary inputs. 5What is the input impedance in problem B-1 ? 6Design a noninverting amplifier to have a voltage gain of 15. Draw the circuit and show component values 7Assume a noninverting amplifier with Rf = 100KΩ, Ri = 25KΩ, RL (load resistance) of 10KΩ and aVin = 2V bVin = 2V Calculate Iout and Vout. 8Sketch Vin and Vo vs. time in the circuit shown. Assume Vin is a 4Vpk triangular waveform at 100 Hz. 20kΩ 10kΩ Vo + 1.5 V LM741CN Vin 10kΩ - 91011- Draw a voltage follower (buffer) circuit What is the advantage of a voltage follower? Calculate Vo in the circuit shown. 20kΩ 10kΩ 1.2 V 20Ω Vo + 2V LM741CN 10kΩ 10kΩ - 10kΩ 1V 1.5 V 12: Design a noninverting adder so that Vo= 5(V1 + V2 + V3 ). Where V1 , V2 and V3 are arbitrary inputs. 13- Refer to the circuit below: 40kΩ 10kΩ Vo + 2V LM741CN Vin 10kΩ - Assume Vin is a 3 Vpk triangular waveform at 100Hz. What is the maximum dc input value before the output saturates ? 14abc- In an ideal op-amp, what are the ideal values of the following: input biasing currents (Ib-, Ib+) the input impedance the output impedance 1515- What is meant by “virtual ground” in op-amp circuits? What is the input impedance in problem B-6 ?