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Questions and Answers
What type of triggering is suitable to operate latches and flip-flops?
What type of triggering is suitable to operate latches and flip-flops?
- Input voltage changes
- Clock pulses (correct)
- Magnetic field variations
- Temperature fluctuations
What problem may synchronous sequential circuits help avoid?
What problem may synchronous sequential circuits help avoid?
- Signal delay
- Voltage drop
- Instability (correct)
- Overheating
What type of circuit responds only to pulses on particular inputs?
What type of circuit responds only to pulses on particular inputs?
- Combinational circuits
- Synchronous sequential circuits (correct)
- Asynchronous sequential circuits
- Feedback circuits
What is the main function of flip-flops used in clocked sequential circuits?
What is the main function of flip-flops used in clocked sequential circuits?
How are storage elements affected in synchronous clocked sequential circuits?
How are storage elements affected in synchronous clocked sequential circuits?
What is the UML notation for inheritance?
What is the UML notation for inheritance?
What must a derived class do to override a method from the base class?
What must a derived class do to override a method from the base class?
What keyword is used to declare a method as virtual in the base class?
What keyword is used to declare a method as virtual in the base class?
What modifier must the overriding method be preceded by in the derived class?
What modifier must the overriding method be preceded by in the derived class?
What does C# provide to allow the derived class to override a method of the base class?
What does C# provide to allow the derived class to override a method of the base class?
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Study Notes
Combinational Circuits
- Outputs are entirely dependent on the current inputs
- Contains no storage elements, no feedback
Sequential Circuits
- Consists of a combinational circuit with storage elements connected to form a feedback path
- Outputs are a function of both the current inputs and the present state of the storage elements
Storage/Memory Elements
- Capable of storing binary information
- Define the state of the sequential circuit
- Next state is a function of external inputs and current state
- (inputs, current state) ⇒ (outputs, next state)
Types of Sequential Circuits
- Two major types: depending on the timing of their signals
Asynchronous Sequential Circuits
- Transition happens at any instant of time
- Do not use clock pulses
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