Analog Devices Product Application Engineer Interview Questions and Answers

Q1. Explain the working of CMOS inverter
Ans. 
CMOS inverter is a type of logic gate that converts input signals into their complementary outputs.
• CMOS inverter consists of a PMOS transistor and an NMOS transistor connected in series.

• When input is high, PMOS conducts and NMOS is off, resulting in output low.

• When input is low, NMOS conducts and PMOS is off, resulting in output high.

• CMOS technology is widely used in digital integrated circuits due to its low power con
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Q2. Write a verilog code for sequence detectro
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Verilog code for sequence detector
• Use state machines to detect the desired sequence

• Define states for each part of the sequence

• Use combinational logic to transition between states

• Implement the Verilog code using if-else statements and always blocks
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Q1. Technical and past experience
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Q1. Dsd , analog electronics circuit based questions were asked
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Q1. C programming from basics was asked using tricky pseudo codes
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Q1. 1. Tell me things not in your resume 2. Hobbies 3. Why I shouldn't Hire you 4. You like managerial or developer and why
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Technical+apptitude round questions were tough in technical

Q1. Mostly on filters block diagrams ,opamps,converters etc
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Q2. What is physical significance of 2nd order on filtwrs
Ans. 
Second order filters have steeper roll-off and better attenuation of higher frequencies.
• Second order filters have a slope of -40 dB/decade.

• They have a higher Q factor than first order filters.

• They provide better attenuation of higher frequencies.

• Examples include Butterworth, Chebyshev, and Bessel filters.
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Basic questions on oops and dsa pointers

Q1. Coding questions
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Q2. String Question
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Q1. Can make a simple button debounce circuit ?
Ans. 
Yes, a simple button debounce circuit can be created using a resistor and a capacitor.
• Use a resistor and a capacitor in series with the button to create a low-pass filter.

• Connect the output of the filter to a Schmitt trigger to clean up the signal.

• Adjust the values of the resistor and capacitor to achieve the desired debounce time.

• Example: Use a 10k ohm resistor and a 0.1uF capacitor for a debounce time of 10ms.
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Q1. Write a structured embedded C program to read button input, remove glitches.
Ans. 
Program to read button input and remove glitches in embedded C.
• Use a state machine to debounce the button input.

• Implement a delay to filter out glitches.

• Consider using interrupts for efficient button handling.
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