السؤال 300

What is a common use for point-contact diodes?

As a constant current source
As a constant voltage source
As an RF detectorالإجابة الصحيحة
As a high-voltage rectifier

الشرح

A point-contact diode's junction is a fine wire pressed against the semiconductor surface, so the junction area — and with it the capacitance and stored charge — is tiny and the device rectifies RF up to microwave frequencies. That same small junction cannot carry rectifier currents or block high voltage, and it regulates neither voltage nor current.

الشرح

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