12 Questions
What does TRAPATT stand for?
Trapped Plasma Avalanche Triggered Transit
What is the basic operation of the oscillator in TRAPATT diodes?
Semiconductor n+-p-p+ junction diode reverse biased
What are the typical structures of high-peak-power TRAPATT diodes?
Silicon n+-p-p+ or p+-n-n+
What happens as a high-field avalanche zone propagates through the diode in TRAPATT operation?
A dense plasma of electrons and holes fills the depletion layer
What type of voltage waveform is typically assumed for the TRAPATT mode of an avalanche p+ -n-n+ diode?
Square wave
What is the purpose of the doping of the depletion region in TRAPATT diodes?
To reduce breakdown voltage
What happens at point B to point C in the TRAPATT diode?
The particle current exceeds the external current and the electric field is depressed throughout the depletion region.
What happens at point D in the TRAPATT diode?
The field is further depressed and 'traps' the remaining plasma.
What occurs at point E in the TRAPATT diode?
A residual charge of electrons remains in one end of the depletion layer and a residual charge of holes in the other end.
What is true about point F in the TRAPATT diode?
All the charge that was generated internally has been removed.
What occurs at point G in the TRAPATT diode?
The diode charges up again like a fixed capacitor.
What is responsible for depressing the electric field throughout the depletion region in a TRAPATT diode?
The generation of a sufficient number of carriers.
Test your knowledge of TRAPATT and IMPATT diodes with this quiz covering lecture ten of ECO 411 on Microwave Devices by Prof. Dalia Elsheakh. Learn about the operation and characteristics of these high-efficiency microwave generators.
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