1. ### Noninverting op amp doesn't work on a highly resistive load

Hi, I am using an Apex PA443DF operational amplifier to drive a sinusoidal signal at 100 V amplitude across a very large resistor with resistance of about 5000 Mega ohms. The amplifiers are set up as noninverting with a gain of 22 and function very well for small resistive loads. The sinusoids...
2. ### Engineering Sketching output waveforms while considering slew rate

1. Using the frequency equation I know the time period is 1 millisecond. 2. The duty cycle (50%) equation tells me that the pulse width and the amplitude is 1 V. 3. Thus the input waveform looks like this : (?) 4. As the slew rate is 0.5 volts per microsecond, the output voltage would take...
3. ### Engineering Basic opamp design problem ##V_{output} = 3V_1 - 2V_2##

Here I let ##R_2 = 2 ## kohms and ##R_1 = 1## kohms. Using this suggests that ##R_3 = 0## and ## R_4 = 1 ## kohms (?!) The resulting circuit is Is this the correct way to solve this? PS : I just realised that I have interchanged ##V_1## and ## V_2## in the diagram!
4. ### Engineering How can I find the open loop voltage gain of this opamp?

The open loop voltage gain is given as : $$u(s) = \frac{u_o}{1+\frac{s}{w_o}} = \frac{100}{1 + \frac{s}{40}}$$ Where u_o is the d.c. voltage gain and w_o is the pole. The op amp that is given is: And I am told to use the non ideal op amp model as follows: Well my guess is that I can...
5. ### Operational Amplifier key parameters

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6. ### What is the gain error for this opamp driven by a voltage

Homework Statement The op amp has a near ideal level 1 model with G = 5000V/V, ri = inf, ro = 0 How would I obtain the feedback function? Homework Equations I know I have to find the feedback function which is: f = - (ΔV/Vin) The Attempt at a Solution I will first drive using the...
7. ### Engineering Derive expressions for the voltage gain of this opamp circuit

Homework Statement Derive the expressions for the voltage gain (Gv) of the following op amp: Homework Equations In = Ip = 0 Vp =Vn The Attempt at a Solution I can use KCL, and the fact that In and Ip are both 0, to derive the two equations, one from the top node and the other from...
8. ### How can I analyze this transimpedance amplifier?

Homework Statement The opAmp network shown in figure 68 is a transimpedance amplifer that employs both negative and positive feedback. Assuming that the op-amp is ideal, calculate the value for the output voltage for Jg is 1mA. The circuit and question are this...
9. ### Charging a battery and monitoring the current w/ an instrumentation amp

Homework Statement Homework Equations CMRR = Av/Acm Acm= Δ/R , Δ = (2 x Tolerance of Resistor).R The Attempt at a Solution I have to admit I am a bit confused by the premise of the problem. My understanding is Vout is used to vary Vcharge in some way, so that Icharge is always 1.3 A. Then...
10. ### Instrumentation op-amp problem

Homework Statement Homework Equations [/B] CMRR = Av/Acm Acm= Δ/R , Δ = (2 x Tolerance of Resistor).R The Attempt at a Solution I have an issue with part e) and f) but here are all my workings c) For this part, Acm would be: 10 x10^-3 This makes 2.5mV -> 0.25 uV (which is the same...
11. ### Engineering Grounding Op-Amp circuit exercise

Homework Statement 2. Homework Equations 3. The Attempt at a Solution For the first set of questions: I've worked through to part 6), at which is I encountered my first problem. I'm not entirely sure what the question is asking. Is it as if there would be a capacitor between...
12. ### Hi, i need to know if this DAC-op-amp calculation is ok

Homework Statement Homework Equations The Attempt at a Solution
13. ### Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Course introduction; Negative feedback control

COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
14. ### Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Negative feedback amplifier

COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
15. ### Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Step response, sinusoidal steady state response

COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
16. ### Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Loop gain and unity loop gain frequency; Opamp

COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
17. ### Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Opamp realization using controlled sources; Delay in the loop

COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
18. ### Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Negative feedback amplifier with ideal delay-small delays

COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
19. ### Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Negative feedback amplifier with ideal delay-large delays

COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
20. ### Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Negative feedback amplifier with parasitic poles and zeros

COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
21. ### Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Negative feedback amplifier with parasitic poles and zeros; Nyquist criterion

COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
22. ### Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Nyquist criterion; Phase margin

COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
23. ### Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Phase margin

COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
24. ### Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Single stage opamp realization

COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
25. ### Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Two stage miller compensated opamp - 1

COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
26. ### Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Two stage miller compensated opamp - 2

COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
27. ### Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Two and three stage miller compensated opamps; Feedforward compensated opamp - 1

COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
28. ### Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Feedforward compensated opamp - 2

COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
29. ### Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Feedforward compensated opamp - 3

COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
30. ### Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Feedforward compensated opamp - 4; typical opamp data sheet

COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030