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Explain in in detail working principle of RAPD. Why it is called reach through APD and compare its working with PIN diode.
1 Answer
written 7.2 years ago by |
i. The silicon ‘reach through’ APD (RAPD) consists of p+–π–p–n+ layers as shown in Figure18.
ii. The high-field region where the avalanchemultiplication takes place is relatively narrow and centered on the p–n+ junction. Thusunder low reverse bias most of the voltage is dropped across the p–n+ junction.
iii. When the …