What is the dropout voltage of a linear voltage regulator?
The correct answer is C: Minimum input-to-output voltage required to maintain regulation. What is the dropout voltage of a linear voltage regulator is the minimum input-to-output voltage required to maintain regulation. Dropout voltage is the minimum voltage difference needed. For amateur radio operators, this is important for power supply design. Understanding this helps when selecting regulators.
Exam Tip
Dropout voltage of linear regulator = minimum input-to-output voltage required to maintain regulation. Think 'D'ropout 'V'oltage = 'D'ifference 'V'oltage (minimum). Dropout voltage is the minimum voltage difference needed. Not input for power dissipation, not output drop, not output decrease - just minimum input-to-output voltage for regulation.
Memory Aid
"Dropout voltage of linear regulator = minimum input-to-output voltage required to maintain regulation. Think 'D'ropout = 'M'inimum 'D'ifference. Dropout voltage is the minimum voltage difference needed. Important for power supply design."
Real-World Application
The dropout voltage of a linear voltage regulator: It's the minimum input-to-output voltage required to maintain regulation. Below this voltage difference, the regulator can't maintain the output voltage. This is what dropout voltage is - minimum input-to-output voltage.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Minimum input voltage for rated power dissipation isn't dropout - dropout is minimum input-to-output voltage for regulation. Input voltage for power dissipation isn't dropout.
Option B: Incorrect. Maximum output voltage drop when input varied isn't dropout - dropout is minimum input-to-output voltage for regulation. Output voltage drop isn't dropout.
Option D: Incorrect. Maximum output voltage decrease at rated load isn't dropout - dropout is minimum input-to-output voltage for regulation. Output voltage decrease isn't dropout.
题目解析
The correct answer is C: Minimum input-to-output voltage required to maintain regulation. What is the dropout voltage of a linear voltage regulator is the minimum input-to-output voltage required to maintain regulation. Dropout voltage is the minimum voltage difference needed. For amateur radio operators, this is important for power supply design. Understanding this helps when selecting regulators.
考试技巧
Dropout voltage of linear regulator = minimum input-to-output voltage required to maintain regulation. Think 'D'ropout 'V'oltage = 'D'ifference 'V'oltage (minimum). Dropout voltage is the minimum voltage difference needed. Not input for power dissipation, not output drop, not output decrease - just minimum input-to-output voltage for regulation.
记忆口诀
Dropout voltage of linear regulator = minimum input-to-output voltage required to maintain regulation. Think 'D'ropout = 'M'inimum 'D'ifference. Dropout voltage is the minimum voltage difference needed. Important for power supply design.
实际应用示例
The dropout voltage of a linear voltage regulator: It's the minimum input-to-output voltage required to maintain regulation. Below this voltage difference, the regulator can't maintain the output voltage. This is what dropout voltage is - minimum input-to-output voltage.
错误选项分析
Option A: Incorrect. Minimum input voltage for rated power dissipation isn't dropout - dropout is minimum input-to-output voltage for regulation. Input voltage for power dissipation isn't dropout. Option B: Incorrect. Maximum output voltage drop when input varied isn't dropout - dropout is minimum input-to-output voltage for regulation. Output voltage drop isn't dropout. Option D: Incorrect. Maximum output voltage decrease at rated load isn't dropout - dropout is minimum input-to-output voltage for regulation. Output voltage decrease isn't dropout.
知识点
Dropout voltage, Linear voltage regulator, Minimum input-to-output voltage, Required to maintain regulation
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.