Question
What is a shift register?
Answer Options
- A) A clocked array of circuits that passes data in steps along the array
- B) An array of operational amplifiers used for tri-state arithmetic operations
- C) A digital mixer
- D) An analog mixer
Correct Answer: A
Explanation
A shift register is a sequence of cascaded digital flip-flops (memory cells) that are configured to store and move binary data. It is a fundamental component in digital logic for temporary data storage or manipulation.
The device is a clocked array of circuits that passes data in steps along the array. With each pulse of a synchronized clock signal, the data bit stored in one flip-flop is transferred (‘shifted’) to the next one in the sequence. Shift registers are essential for performing serial-to-parallel and parallel-to-serial data conversion.
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