EDN

Using 8:1 Multiplexers to Implement Logical Functions

It’s possible to use an 8:1 multiplexer to implement any 3-input logical function, but can we use it to implement a 4-input function? On the one hand, some logic problems never seem to go away. On the ...
EDN

Using an 8:1 Multiplexer to Implement a 4-input Logical Function

Now, the thing to remember is that we are using a CD4512 chip, whose truth table is shown below. The important thing to note here is that, in addition to the three multiplexer select controls, A, B, ...
Hackaday

From Gates To FPGA’s – Part 1: Basic Logic

It’s time to do a series on logic including things such as programmable logic, state machines, and the lesser known demons such as switching hazards. It is best to start at the beginning — but even ...
Design-Reuse

Pipeline AES S-box Implementation Starting with Substitution Table

The SubByte transformation, carried out by S-box, is the most time consuming procedure in Advanced Encryption Standard (AES) algorithm. A look-up table is commonly used for SubByte transformation in ...
Design News

Implementing a 1-Digit BCD 8421 Adder, Part 2

In Part 1 of this two-part binary coded decimal (BCD) extravaganza, we introduced a bunch of bodacious concepts, including the binary (base-2) number system, binary logic, binary computers, and bits, ...