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Course information comes from the public UCLA General Catalog. Requisites are read from UCLA’s published wording and can be incomplete or out of date — check the official catalog listing and your department adviser before you enroll.

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EC ENGR 121B · EE 121BPrinciples of Semiconductor Device Design

Electrical and Computer Engineering · 4 units · Undergraduate upper division (100-199)

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Introduction to principles of operation of bipolar and MOS transistors, equivalent circuits, high-frequency behavior, voltage limitations.

Letter grading.

When it runs

Checking the Schedule of Classes…

Requisites

Official UCLA wording

Enforced requisite: course 2.

BruinTree reads · Prerequisite

confidence 1.00 · from text
EC ENGR 2

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About EC ENGR 121B. We read UCLA’s requisite wording by machine, and it gets things wrong.

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Requires

Everything that has to come before this course, not just the courses named in the requisite above.

EC ENGR 121B

  • EC ENGR 2Physics for Electrical Engineers
    • PHYSICS 1CPhysics for Scientists and Engineers: Electrodynamics, Optics, and Special Relativity
      • MATH 32ACalculus of Several Variables1 more beneath
      • PHYSICS 1APhysics for Scientists and Engineers: Mechanics2 more beneath
      • MATH 32BCalculus of Several Variables1 more beneath
      • PHYSICS 1BPhysics for Scientists and Engineers: Oscillations, Waves, Electric and Magnetic Fields1 more beneath
      • MATH 33ALinear Algebra and Applications2 more beneath

1 direct requisite. Showing 7 courses over 3 levels; the branches marked with a count carry on past it. Every course here opens its own tree.

Unlocks

What this course is a requisite for, and what those courses lead to in turn.

EC ENGR 121B

  • EC ENGR 121DASemiconductor Processing and Device Design
    • EC ENGR 121DWSemiconductor Processing and Device Design

1 course lists this as a requisite. The whole downstream is here — 2 courses over 2 levels. Every course here opens its own tree.

  • Fall 2025
  • Winter 2026
  • Fall 2026
  • Winter 2027

Scheduled, not typical — from UCLA’s Schedule of Classes, which publishes Fall 2025 through Spring 2027 and nothing before it.