Texas Instruments Analog Design Engineer Interview Question

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Analog Design Interview/Screening Test questions for Texas Instrument ,Micron Technology, ST Microelectronics, Synopsys, Steradian semiconductor, NXP Semiconductor, Analog Devices, Intel, Samsung etc.

find opamp output voltage.

#opamp
#circuits
#texasinstruments
#analogdesign
#analog_circuits

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[saivamsi]

Superb question followed by good explanation

[SAhellenLily]

Thank you Sir👌
guess 😖
It is comparator and then v+>v-
So vo=+Saturation.. ANSWER

[MANISHKUMAR-eety]

Good question with very good explanation.
We can apply node analysis at V- and Vo is coming 5Volts.
If i am wrong, please Correct me.

[dhirajbhoi]

Please confirm again. How to calculate feedback gain of a opamp step wise.
Let me say few steps
1. De-energies the independence source .
i) voltage source -Short circuit
ii) Current source -Open circuit.


Here in state of current source if the source was a voltage source of 1v. Then the opamp have a negative feedback and output of opamp will be 1v. please correct me if I make any mistake.

[EnlightenedJourney]

Why did not you use virtual ground concept here... V+ = V-

[somswyd]

This is purely a hypothetical question with NO practical significance... If the Vo = +5V as described in the video, first of all how is the 1mA current source going to flow in the direction shown ? When the 1mA current "can not flow", V(-) becomes 0V and Vo becomes 0 as it is ideal opamp... Even in this case the current source can not flow ( if the current source has to flow a current in the direction, its left side has to be + and right side - and is NOT possible here ) in the direction shown and hence v(-) remains at 0v and Vo remains at 0v