What is a shift register?
The correct answer is A: A clocked array of circuits that passes data in steps along the array. What a shift register is a clocked array of circuits that passes data in steps along the array. Shift registers store and shift data bits sequentially with each clock pulse. For amateur radio operators, this is important for digital circuits. Understanding this helps when working with digital systems.
Exam Tip
Shift register = clocked array that passes data in steps. Think 'S'hift 'R'egister = 'S'equentially 'R'egisters data. Clocked array of circuits that passes data in steps along the array with each clock pulse. Not op-amps, not mixers - just data shifting.
Memory Aid
"Shift register = clocked array that passes data in steps. Think 'S'hift 'R'egister = 'S'equentially 'R'egisters. Clocked array of circuits that passes data in steps along the array. Used for serial data handling."
Real-World Application
A shift register: Data bits are loaded and then shifted through the register with each clock pulse. Each bit moves one position per clock cycle. Shift registers are used for serial-to-parallel conversion, data storage, and other digital functions. They're clocked arrays that pass data in steps.
Key Concepts
Why Other Options Are Wrong
Option B: Incorrect. Shift registers aren't arrays of operational amplifiers for tri-state arithmetic - that's not what shift registers do. Op-amps and tri-state aren't related to shift registers.
Option C: Incorrect. Shift registers aren't digital mixers - mixers combine signals, shift registers shift data. Different functions.
Option D: Incorrect. Shift registers aren't analog mixers - they're digital circuits, not analog. Analog mixers are different.
题目解析
The correct answer is A: A clocked array of circuits that passes data in steps along the array. What a shift register is a clocked array of circuits that passes data in steps along the array. Shift registers store and shift data bits sequentially with each clock pulse. For amateur radio operators, this is important for digital circuits. Understanding this helps when working with digital systems.
考试技巧
Shift register = clocked array that passes data in steps. Think 'S'hift 'R'egister = 'S'equentially 'R'egisters data. Clocked array of circuits that passes data in steps along the array with each clock pulse. Not op-amps, not mixers - just data shifting.
记忆口诀
Shift register = clocked array that passes data in steps. Think 'S'hift 'R'egister = 'S'equentially 'R'egisters. Clocked array of circuits that passes data in steps along the array. Used for serial data handling.
实际应用示例
A shift register: Data bits are loaded and then shifted through the register with each clock pulse. Each bit moves one position per clock cycle. Shift registers are used for serial-to-parallel conversion, data storage, and other digital functions. They're clocked arrays that pass data in steps.
错误选项分析
Option B: Incorrect. Shift registers aren't arrays of operational amplifiers for tri-state arithmetic - that's not what shift registers do. Op-amps and tri-state aren't related to shift registers. Option C: Incorrect. Shift registers aren't digital mixers - mixers combine signals, shift registers shift data. Different functions. Option D: Incorrect. Shift registers aren't analog mixers - they're digital circuits, not analog. Analog mixers are different.
知识点
Shift register, Clocked array, Data shifting, Digital circuits
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.