Synopsys Hardware Engineer Interview Questions and Answers

Q1. What kind FPGAs used, tell me difference
Ans. 
FPGAs are Field-Programmable Gate Arrays used in hardware design. They can be categorized as SRAM-based, Flash-based, or Antifuse-based.
• SRAM-based FPGAs are volatile and require reprogramming every time they power up. Examples include Xilinx Virtex series.

• Flash-based FPGAs are non-volatile and retain their configuration even when powered off. Examples include Actel ProASIC3 series.

• Antifuse-based FPGAs are OTP (One-Time...read more
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Q2. Calculation of Decoupling analysis
Ans. 
Decoupling analysis involves calculating the required capacitance to maintain stable voltage levels in a circuit.
• Decoupling analysis is essential for ensuring stable power supply in electronic circuits.

• It involves calculating the amount of capacitance needed to filter out noise and maintain voltage levels.

• Decoupling capacitors are placed strategically in a circuit to provide this filtering effect.

• The formula for calcul...read more
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Was asked details of scanning electron microscopy

Aptitude, Digital Electronics.

Questions on dgital electronics and circuits

Q1. Questions on digital electronics , STA and FSM and Verilog
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Digital Electronics, verilog basics,C language basics,

Q1. Project description, digital system design for start bit detector in UART
Ans. 
Designing a digital system for detecting start bit in UART communication
• The start bit is the first bit in a UART transmission and is always a logic low

• The system should sample the incoming data at a rate higher than the baud rate to accurately detect the start bit

• A shift register can be used to store the incoming data and detect the start bit

• The system should also check for framing errors and parity errors
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Q2. Project description, latch based circuit and flip flop based circuits, 1 puzzle
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In this round Aptitude questions related to unitary method, probability and others were asked. In technical Test questions of Digital Electronics and Analog Electronics were asked.

Q1. In this round they asked about my projects, Clock Domain Crossing, Clock related questions were asked and some good digital circuits questions were asked.
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Given all king of aptitude part

Q1. Analog and digital electronics
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Q2. Draw the bode plot for CS amplifier
Ans. 
Bode plot for CS amplifier shows gain and phase response with frequency.
• Bode plot consists of two plots - one for gain (in dB) and one for phase shift (in degrees) vs frequency.

• The gain plot typically shows a high-pass filter response with a peak at the resonant frequency.

• The phase plot shows a 180 degree phase shift at the resonant frequency.

• Bode plots are useful for analyzing frequency response of amplifiers and filt
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