2019 - 2020

0512-3514   Digital Electronic Circuits  
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Course description
Credit points: 3.5
Prerequisites: Digital Logic Systems; Analog Electronic Circuits.
Course aims: Digital circuits play a very important role in today’s electronic systems. They are employed in almost every facet of electronics, including communications, control, instrumentation, and, of course, computing. This course emphasis the studying and understanding of basic electronic devices characterization and behavior as switches. Design and analysis of basic electronic circuits consisting of BJT and MOSFET transistors operating as switches. Use of computer simulation program to analyze digital electronic circuits under their utmost limits.
Course description: Introduction to Logic Signals and Circuits – Digital signals, logic levels, logic families, the basic inverter, the ideal and typical switch, transfer characteristics, noise margin, static and dynamic power dissipation. Temporal behavior: propagation delay of a gate, rise time, fall time, Delay-Power product. NMOS Inverter – Depletion and Enhancement load, static and dynamic operation and transfer characteristics. NMOS logic gates. The body effect.CMOS Inverter – Static and dynamic operation and transfer characteristics. Example of CMOS logic gates. Analogue transmission gate.Flip-flops – SR-FF, D-FF, JK-FF. Master-Slave, multi-phase circuits, shift registers and counters, synchronization and metastate.Dynamic logic – Bucket Brigade and CCD analogue shift registers, dynamic shift registers, dynamic gates and dynamic decoders and PLAs.Memory cells – Static RAM cells, dynamic RAM cells, ROM, PROM, EPROM, E2PROM and sense amplifiers.Bipolar digital circuits – Characteristics of standard TTL, LSTTL and ECL gates. Fan-in and Fan-out. Clamping and clipping circuits.Clock Generators – Schmitt Triggers. Monostable and astable multivibrator circuits using CMOS, operational amplifiers and IC such as 555.Design of Digital Circuits – HDL and VHDL languages. Customer, ASIC, PLDs, FPGAs.Introduction to Data Converters – Principle of A/D and D/A converters.Data Sheet – Timing diagram. Interpretation of manufacturers’ data sheets.
Special requirements – Pspice or EWB software for course assignments and homework.

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