Which characteristic of a Schottky diode makes it a better choice than a silicon junction diode for use as a power supply rectifier?
The correct answer is D: Lower forward voltage drop. Which characteristic of a Schottky diode makes it a better choice than a silicon junction diode for use as a power supply rectifier is lower forward voltage drop. Schottky diodes have lower forward voltage, reducing losses. For amateur radio operators, this is important for power supply design. Understanding this helps when selecting rectifiers.
Exam Tip
Schottky diode advantage for rectifier = lower forward voltage drop. Think 'S'chottky = 'S'mall forward voltage. Schottky diodes have lower forward voltage, reducing losses. Not higher breakdown, not avalanche voltage, not carrier retention - just lower forward voltage.
Memory Aid
"Schottky diode advantage for rectifier = lower forward voltage drop. Think 'S'chottky = 'L'ower forward voltage. Schottky diodes have lower forward voltage, reducing losses. Important for power supply design."
Real-World Application
A Schottky diode as a power supply rectifier: It's a better choice than a silicon junction diode because of lower forward voltage drop. Lower forward voltage means less power loss and higher efficiency. This is the advantage - lower forward voltage drop.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Much higher reverse voltage breakdown isn't the advantage - Schottky diodes have lower forward voltage. Higher breakdown isn't the advantage.
Option B: Incorrect. More constant reverse avalanche voltage isn't the advantage - Schottky diodes have lower forward voltage. Avalanche voltage isn't the advantage.
Option C: Incorrect. Longer carrier retention time isn't the advantage - Schottky diodes have lower forward voltage. Carrier retention isn't the advantage.
题目解析
The correct answer is D: Lower forward voltage drop. Which characteristic of a Schottky diode makes it a better choice than a silicon junction diode for use as a power supply rectifier is lower forward voltage drop. Schottky diodes have lower forward voltage, reducing losses. For amateur radio operators, this is important for power supply design. Understanding this helps when selecting rectifiers.
考试技巧
Schottky diode advantage for rectifier = lower forward voltage drop. Think 'S'chottky = 'S'mall forward voltage. Schottky diodes have lower forward voltage, reducing losses. Not higher breakdown, not avalanche voltage, not carrier retention - just lower forward voltage.
记忆口诀
Schottky diode advantage for rectifier = lower forward voltage drop. Think 'S'chottky = 'L'ower forward voltage. Schottky diodes have lower forward voltage, reducing losses. Important for power supply design.
实际应用示例
A Schottky diode as a power supply rectifier: It's a better choice than a silicon junction diode because of lower forward voltage drop. Lower forward voltage means less power loss and higher efficiency. This is the advantage - lower forward voltage drop.
错误选项分析
Option A: Incorrect. Much higher reverse voltage breakdown isn't the advantage - Schottky diodes have lower forward voltage. Higher breakdown isn't the advantage. Option B: Incorrect. More constant reverse avalanche voltage isn't the advantage - Schottky diodes have lower forward voltage. Avalanche voltage isn't the advantage. Option C: Incorrect. Longer carrier retention time isn't the advantage - Schottky diodes have lower forward voltage. Carrier retention isn't the advantage.
知识点
Schottky diode, Better choice, Power supply rectifier, Lower forward voltage drop
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.