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ECO 411 Microwave Devices Prof. Dalia Elsheakh Lecture Ten Quiz

13 Questions

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ECO 411 Microwave Devices Prof. Dalia Elsheakh Lecture Ten Quiz

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Questions and Answers

What does TRAPATT stand for?

Transit Avalanche Plasma Triggered Transit

Trapped Plasma Avalanche Triggered Transit (correct)

Transit Avalanche Propagation Turnaround Time

Transmission of Avalanche Propagation Transistor Time

What is the basic operation of the TRAPATT oscillator?

Forward biased p-n junction diode

Light emitting diode operation

Zener diode breakdown

Reverse biased p-n junction diode (correct)

What are high-peak-power TRAPATT diodes typically made of?

Gallium arsenide n+-p-p+ structures

Silicon n+-p-p+ structures (correct)

Silicon n+-n-n+ structures

Germanium n+-p-p+ structures

What is the width range of the depletion region in high-peak-power TRAPATT diodes?

2.5 to 12.5 μm Signup and view all the answers

What happens as a high-field avalanche zone propagates through the TRAPATT diode?

The depletion layer fills with a dense plasma of electrons and holes Signup and view all the answers

What type of voltage waveform is typical for the TRAPATT mode of an avalanche diode?

Square wave Signup and view all the answers

What happens to the diode current at point A?

The diode current is turned on Signup and view all the answers

What happens to the electric field at point B to point C?

The electric field magnitude decreases Signup and view all the answers

What happens at point D?

The voltage decreases Signup and view all the answers

Why does it take a long time to remove the plasma?

Because the total plasma charge is large compared to the charge per unit time in the external circuit Signup and view all the answers

What happens at point E?

The plasma is removed Signup and view all the answers

What happens from point F to point G?

The diode charges up like a fixed capacitor Signup and view all the answers

What happens to the diode current at point G?

The diode current goes to zero Signup and view all the answers