ECG 421–Digital Electronics

CATALOG DATA:

Analysis and design techniques for digital and mixed analog/digital circuits. CMOS and ECL logic families, multivibrators, Schmitt triggers and comparators, pulse generators, sample and hold circuits, and D/A and A/D converters.

TEXTBOOK:

[1] Sedra and Smith, “Microelectronics Circuits”, 4th Edition.

[2] Roberts and Sedra, “SPICE for Microelectronics Circuits”.

[3] Book by Gopalakrishnan

COORDINATOR:

Muthukumar Venkatesan, Assistant Professor

COURSE OBJECTIVES:

  1. Understand and analyze the Transfer Characteristics, noise margins, propagation delay, power consumption of various logic gates.
  2. Understand the working of CMOS based inverter, NOR, NAND gates, pass-transistor logic and CMOS transmission gate, latches, S-R flip-flop, SRAM and DRAM cells
  3. Understand the working of BJT based basic BJT inverter, BJT switching speed and saturation, basic NOR and NAND topologies. BJT switching, ECL Inverter, OR/NOR and other gates.
  4. Understand, design and analyzewave generator circuits, timers and oscillators..
  5. Understand and design basic concepts of DACs and ADCs.

COURSE OUTCOMES:

Students will be

  1. Design logic gates for implementing logic functions, inverters and flip-flops using BJTs and MOSFETs
  2. Able to identify the function being implemented by a CMOS or ECL digital circuit, and the factors affecting its performance.
  3. Analysis and design of logic gates and determine logic levels, (W/L), noise margins, and propagation delay.
  4. Realize memory elements (such as Latches and SRAM) using MOSFET
  5. Design and analyze clock/waveform generation circuits using with multivibrators, Schmitt triggers, and IC timers.
  6. Understand and design D-A data converter circuit realizations

PREREQUISITE:

ECG 300 (Formerly EEG 416)

TOPICS:

  1. Logic Gate Concepts: Transfer Characteristics, noise margins, propagation delay, power consumption.
  2. CMOS logic gates and storage elements:CMOS based inverter, NOR, NAND gates, pass-transistor logic and CMOS transmission gate, latches, S-R flip-flop, SRAM and DRAM cells
  3. ECL logic gates: BJT based basic BJT inverter, BJT switching speed and saturation, basic NOR and NAND topologies. BJT switching, ECL Inverter, OR/NOR and other gates.
  4. Mixed-signal timing and waveform generation: Monostable/bistable/astable multivibrator circuits, Schmitt trigger.
  5. Data Converters: basic concepts of DACs, transfer curve, resolution and accuracy, binary-weighted resistor realization, R-2R Ladder realization, bit-expansion methods, conversion speed. Basic concepts of ADCs, quantization levels and transfer curve, resolution and accuracy, tracking (counter) ADC, successive-approximations ADC, flash (parallel) converter, conversion speed, Sample and Hold circuit for ADCs.

LABORATORY PROJECTS:

PSPICE Simulation of various digital and mixed analog/digital circuits

DESIGN CONTENT:

1 Credit

CLASS SCHEDULE:

Lecture 2.5 hours per week

RELATIONSHIP BETWEEN COURSE AND PROGRAM OUTCOMES:

These course outcomes fulfill the following program objectives:

COURSE PREPARER AND DATE OF PREPARATION:

Venkatesan Muthukumar (version 2.1- 1 May 2002)