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Device family — Evaluate the statement: "An EPROM is strictly a MOS device."

Difficulty: Easy

Correct Answer: Correct

Explanation:


Introduction:
EPROMs (Erasable Programmable ROMs) are implemented using floating-gate MOS transistors. This question checks foundational device-technology knowledge: whether EPROM belongs to the MOS family. Understanding this helps distinguish EPROM from bipolar PROMs and other memory technologies.

Given Data / Assumptions:

  • EPROM cells use MOSFET structures with floating gates.
  • Programming uses hot-carrier injection or tunneling to place charge on the gate.
  • Erasure (for windowed EPROMs) uses ultraviolet light to remove charge.


Concept / Approach:
Since the storage mechanism is charge on a floating gate within a MOSFET, EPROM is a MOS technology by definition. Bipolar PROMs store data via fusible links or anti-fuses and are distinct. Package style (with or without quartz window) does not change the underlying MOS device physics.

Step-by-Step Solution:

Identify cell structure: floating-gate MOS transistor.Relate operations: electrical programming and UV erasure alter charge on the floating gate.Conclude: EPROM is a MOS device family member.


Verification / Alternative check:

Review technology descriptions in memory textbooks: EPROM and EEPROM/flash are categorized under MOS non-volatile memories.


Why Other Options Are Wrong:

Incorrect: Conflicts with the floating-gate MOS implementation.True only for EEPROM: Both EPROM and EEPROM are MOS-based.Depends on package type: Ceramic vs plastic does not change transistor technology.


Common Pitfalls:

Confusing bipolar PROM fuse technologies with EPROM.Assuming "windowed" package implies a different device physics family.


Final Answer:

Correct
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