Renesas Electronics India Interview Questions and Answers

General aptitude questions. Easy to solve. Didn’t take much time

Q1. Explain operation of rc circuit
Ans. 
An RC circuit consists of a resistor and a capacitor connected in series or parallel, used for filtering, timing, and signal processing.
• RC circuit operation is based on the charging and discharging of the capacitor through the resistor.

• When a voltage is applied to the circuit, the capacitor charges up to the applied voltage through the resistor.

• The time constant (RC) determines how quickly the capacitor charges or disc...read more
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Q2. Draw waveform for diode
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A diode waveform typically shows a voltage drop when forward biased and no current flow when reverse biased.
• Forward biased: voltage drop across diode, current flows

• Reverse biased: no current flow, diode acts as open circuit
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Q1. Questions based on my project
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Q1. What is the difference between latch and flip flop
Ans. 
Latch is level triggered and stores data temporarily, while flip flop is edge triggered and stores data permanently.
• Latch is level triggered, while flip flop is edge triggered

• Latch stores data temporarily, while flip flop stores data permanently

• Latch requires continuous input to hold the output, while flip flop retains the output until a new input is received
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Q2. Draw or gate using nand gates
Ans. 
A NAND gate can be used to create a NOR gate by connecting two NAND gates in series.
• Connect the outputs of two NAND gates together

• Connect the inputs of the two NAND gates to the same input signal

• The output of the combined NAND gates will act as a NOR gate
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Q1. Designing of a frequency divider .
Ans. 
A frequency divider is a digital circuit that takes an input signal and produces an output signal with a frequency that is a fraction of the input frequency.
• Frequency dividers are commonly used in digital systems to generate clock signals at lower frequencies.

• They can be implemented using flip-flops, counters, or other digital logic elements.

• For example, a divide-by-2 frequency divider will output a signal with half th...read more
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Q2. ASIC Design flow
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Q1. Designing of a edge detector
Ans. 
An edge detector is a circuit that detects transitions from one logic level to another in a digital signal.
• Utilizes flip-flops to store previous signal values

• Compares current signal value with previous value to detect edges

• Can be implemented using Verilog or VHDL

• Commonly used in digital signal processing applications
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Q2. BIT Manipulation
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Q1. What is the CMOS?
Ans. 
CMOS stands for Complementary Metal-Oxide-Semiconductor, a technology used in integrated circuits for digital logic functions.
• CMOS technology uses both NMOS and PMOS transistors to achieve low power consumption and high noise immunity.

• It is commonly used in microprocessors, memory chips, and other digital logic circuits.

• CMOS technology allows for the implementation of complex digital systems on a single chip.

• One of the...read more
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