This online course covers the comparison of analog and digital switching circuits. Explains Boolean logic functions. Describes TTL and CMOS logic, as well as IC logic devices. Explains how flip-flops, clock circuits, counters, multiplexers, and memory circuits work. Describes the sections and interfaces in functional logic systems, including microprocessors. Describes proper methods for detection and correction of common fault potentials. This course has no prerequisites. Digital Logic Systems is available in online maintenance training and course manual formats.
TPC Training is authorized by IACET to offer 0.5 CEUs for this program.
Review a full course list for Instrumentation & Control Systems Technician
Lesson 1 - Digital Logic Fundamentals
Topics:
Digital logic; Boolean algebra; Logical AND, OR, NOT function; Positive and negative logic; NAND logic; Combining logic circuits; TTL logic; IC logic devices
Learning Objectives:
– Explain the difference between digital and analog circuits.
– Describe AND, NOT, and OR logic functions.
– Explain how solid-state switches can perform logic functions.
– Compare equivalent NAND and NOR gates using positive and negative logic.
– Discuss the importance of TTL and CMOS circuits.
Lesson 2 - Logic Building Blocks
Topics:
Sequential logic; Flip-flops; Clock circuits; Schmitt triggers; Frequency dividers; Pulse counters
Learning Objectives:
– Describe the function of a logic clock.
– Explain the operation of a flip-flop.
– Discuss the differences among clocked R-S flip-flops, D-latches, and J-K master-slave flip-flops.
– Explain how to convert between the decimal and binary number systems.
– Discuss the use of BCD and the octal and hexadecimal number systems.
Lesson 3 - Medium- and Large-Scale ICs
Topics:
Counters; Serial vs. parallel data transmission; Registers; Multiplexers; Decoder/demultiplexers; Arithmetic circuits; LSI memories
Learning Objectives:
– Explain the operation of each of the following counters: ripple, BCD, synchronous, and up/down.
– Describe the operation of a shift register.
– Discuss the difference between multiplexers and decoders/demultiplexers.
– Define the terms read, write, serial access, and random access as they apply to memories.
– Discuss the purposes of RAM and ROM devices.
Lesson 4 - Functional Logic Systems
Topics:
Logic subsystems; Microprocessors; I/O subsystems; Noncontact switches; Multiple-bit I/O devices; Data codes, displays, and transfer
Learning Objectives:
– Describe the sections of a basic logic system.
– Compare a ROM, a PROM, and a PLA.
– Name the basic parts of a microprocessor.
– Describe common kinds of I/O interfaces and data displays.
Lesson 5 - Troubleshooting Logic Systems
Topics:
Gathering information; Isolating the problem; Localizing the trouble; Interpreting logic diagrams; Timing waveforms; Test equipment
Learning Objectives:
– Describe seven external faults that can affect solid-state circuits.
– List the major steps in efficient troubleshooting.
– Name information sources for identifying system malfunctions.
– Explain how to trace a faulty component by using a troubleshooting tree.
– Explain how to use various kinds of test equipment to pinpoint system faults.
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