Digital Logic Circuit Types
If you are an engineering scholar, you must know these two basic types of digital circuits. If you are not, then clear your concepts with an Electrical Engineering textbook solutions manual.
Ø Combination logic circuits
Combination logic circuits are designed with digital logic gates such as AND load, OR gate, NOT gate, and universal gate (NAND gate and NOR gate).
A complex switching circuit is made by connecting all these gates. Logic gates are a combination of building blocks of logic circuits. In a combination logic circuit, the output at any given time depends only on the input at a given time, and there is no memory device in the combination circuit.
Examples of combination circuits are encoders and decoders. The decoder converts binary coded data in its current input into several different output lines. Other examples include the half adder and full adder, multiplexer, demultiplexer, code converter, etc. These circuits are used in microprocessors and microcontrollers to design computer hardware and in various software components.
Ø The sequential digital logic circuit
The sequential digital logic circuit is different from the above mentioned combination logic circuit. The sequential circuit's output depends not only on the current input of the device but also on the previous input. In other words, the output of the sequential logic circuit depends on the input current and the current state of the circuit.
Unlike combination circuits, sequential circuits have memory devices for storing previous output. Sequential digital logic circuits are combination circuits with memory. These logic circuits are designed by using a finite state machine.
Examples of sequential logic circuits are counters and flip flops; they are built on the same principles. There are two inputs that are powered by combination logic circuits to produce different products.
The output combination from the memory device is given to the logic circuit. Internal inputs and outputs are part of the secondary devices. Secondary input devices are state variables generated by storage elements, where secondary output devices are excited about storage elements.
Conclusion
Read this blog to understand the fundamentals of digital logic circuits. Electrical devices run on these mechanisms; hence it has the significance in our lives. If you are a beginner to study this, get the 3rd Edition of Digital Design Solutions Manual to understand the function of the logical circuit.
