Digital Circuits

Numbering Code U-ENG26 26060 LJ72
U-ENG26 26060 LJ11
Year/Term 2021 ・ First semester
Number of Credits 2 Course Type Lecture
Target Year Target Student
Language Japanese Day/Period Thu.2
Instructor name HASHIMOTO MASANORI (Graduate School of Informatics Professor)
AWANO HIROMITSU (Graduate School of Informatics Associate Professor)
Outline and Purpose of the Course This lecture covers basics of digital circuits. First, fundamental properties of digital signals such as frequency characteristics, transmission and shaping of digital signals will be explained. Next, switching operation of semiconductor devices such as diodes, bipolar transistors and MOS transistors will be examined. Finally, circuit structure and performance of logic gates and memories for digital integrated circuits will be discussed.
Course Goals From this lecture you can understand basic properties of digital signals and linearized circuits. To understand operating principles, circuit performance, and design method of logic gates and memories.
Schedule and Contents Following topics will be covered. By assessing the understanding of the students and adding explanations and tasks when necessary, we will spend the number of weeks listed in [ ].


(1) Basic properties of digital signals [2 weeks]
,Frequency spectrum of digital signals and step response of linearized ircuit will be explained.

(2) Transmission of digital signals [2 weeks]
Signal transfer characteristics of loss-less transmission lines will be explained. Lossy transmission lines will also be covered.

(3) Switching characteristics of semiconductor devices [3 weeks]
DC and transient characteristics of pn junction diodes, bipolar transistors, MOS transistors will be explained.

(4) Waveform shaping of digital signals [1 week]
Waveform shaping circuits such as a clipper, limiter, and Schmitt-trigger circuits will be explained.

(5) Bipolar digital circuits [2 weeks]
Basic logic gates using bipolar transistors are explained. First, DC and transient characteristics of an bipolar inverter circuit will be analyzed. Next, circuit configuration, operating principle and circuit performance of an ECL gate will be discussed.

(6) MOS digital circuits [3 weeks]
Basic logic gates using MOS transistors are explained. Circuit configuration, operating principle and circuit performance of a complementary logic gate, a complex logic gate, and a dynamic logic gate will be discussed.

(7) MOS memory circuits [1 week]
Circuit configuration of ROM and RAM will be explained.

(8) Confirmation of understanding [1 week]
The level of understanding on this lecture will be confirmed. Feedback will be given if necessary.
Evaluation Methods and Policy The level of achievement toward the goal of this lecture will be examined by a regular exam.
Course Requirements Semiconductor Engineering, Logic Circuits, Electronic Circuits
Study outside of Class (preparation and review) Plactices in the handout should be solved after the corresponding topic is covered by the lecture.
Textbooks Textbooks/References Hand-outs will be provided.
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