How does a linear electronic voltage regulator work?
The correct answer is D: The conduction of a control element is varied to maintain a constant output voltage. How does a linear electronic voltage regulator work is that the conduction of a control element is varied to maintain a constant output voltage. Linear regulators vary conduction to maintain constant output. For amateur radio operators, this is important for power supply design. Understanding this helps when working with regulators.
Exam Tip
Linear voltage regulator works = conduction of control element varied to maintain constant output voltage. Think 'L'inear 'R'egulator = 'L'inear 'R'esistance variation (varies conduction). Linear regulators vary conduction to maintain constant output. Not ramp voltage, not eliminating pass transistor, not duty cycle (switching) - just varies conduction.
Memory Aid
"Linear voltage regulator works = conduction of control element varied to maintain constant output voltage. Think 'L'inear 'R'egulator = 'V'aries 'C'onduction. Linear regulators vary conduction to maintain constant output. Important for power supply design."
Real-World Application
A linear electronic voltage regulator: It works by varying the conduction of a control element to maintain a constant output voltage. As load or input changes, the regulator adjusts the pass element's conduction. This is how it works - varies conduction to maintain constant output.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Having ramp voltage as output isn't how linear regulator works - linear regulator varies conduction to maintain constant output. Ramp voltage isn't how it works.
Option B: Incorrect. Eliminating need for pass transistor isn't how linear regulator works - linear regulator uses pass transistor. Eliminating pass transistor isn't how it works.
Option C: Incorrect. Control element duty cycle proportional to conditions isn't linear regulator - that's switching regulator. Duty cycle isn't linear regulator.
题目解析
The correct answer is D: The conduction of a control element is varied to maintain a constant output voltage. How does a linear electronic voltage regulator work is that the conduction of a control element is varied to maintain a constant output voltage. Linear regulators vary conduction to maintain constant output. For amateur radio operators, this is important for power supply design. Understanding this helps when working with regulators.
考试技巧
Linear voltage regulator works = conduction of control element varied to maintain constant output voltage. Think 'L'inear 'R'egulator = 'L'inear 'R'esistance variation (varies conduction). Linear regulators vary conduction to maintain constant output. Not ramp voltage, not eliminating pass transistor, not duty cycle (switching) - just varies conduction.
记忆口诀
Linear voltage regulator works = conduction of control element varied to maintain constant output voltage. Think 'L'inear 'R'egulator = 'V'aries 'C'onduction. Linear regulators vary conduction to maintain constant output. Important for power supply design.
实际应用示例
A linear electronic voltage regulator: It works by varying the conduction of a control element to maintain a constant output voltage. As load or input changes, the regulator adjusts the pass element's conduction. This is how it works - varies conduction to maintain constant output.
错误选项分析
Option A: Incorrect. Having ramp voltage as output isn't how linear regulator works - linear regulator varies conduction to maintain constant output. Ramp voltage isn't how it works. Option B: Incorrect. Eliminating need for pass transistor isn't how linear regulator works - linear regulator uses pass transistor. Eliminating pass transistor isn't how it works. Option C: Incorrect. Control element duty cycle proportional to conditions isn't linear regulator - that's switching regulator. Duty cycle isn't linear regulator.
知识点
Linear electronic voltage regulator, How it works, Conduction of control element, Varied, Maintain constant output voltage
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.