15 Questions
What are the two regions in a diode that are doped differently to create a pn junction?
P region and n region
Which terminal of a diode is connected to the p region and is called the anode?
Cathode
In a diode, which region is considered as the cathode and is connected to the n region?
Anode
What does the band, tab, or feature on a diode package usually indicate?
Cathode
Which type of diode package has L-shaped leads that bend under the package?
SMA packages
In a single-diode SOT package, which pin is usually the anode?
Pin 1
What does the case represent in diodes where one lead is connected to it?
Cathode
Which package type has gull-wing shaped leads for through-hole mounting of diodes?
SOD packages
What is required for a diode to be forward biased?
The negative side of the bias voltage connected to the n region and the positive side to the p region
What is the purpose of using a resistor in diode biasing for forward current?
To prevent damage to the diode by limiting the current
What type of current flows when a diode is forward-biased?
Electron current
What is the role of the bias-voltage source in forward biasing a diode?
Imparts energy to free electrons to overcome the barrier potential
In forward bias, what happens when free electrons move into the p region?
They combine with holes in the valence band
Why is it necessary for the bias voltage to be greater than the barrier potential in forward biasing?
To allow free electrons to overcome the barrier potential
What happens when like charges repel in a forward-biased diode?
Free electrons are pushed towards the pn junction
Learn about the structure and operation of a diode, which is made from silicon with a pn junction and depletion region. Understand the anode and cathode connections, as well as the schematic symbol for a diode.
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