The popular D (“data” or “delay”) flip-flop can really be thought of as a memory cell, a delay line, or a zero-order hold. While the terms flip-flop and latch are sometimes used interchangeably, we generally refer to the unit as a flip-flop if it is clocked if it is simple (i.e., transparent or opaque), we refer to it as a latch. As a result, the flip-flop can be used to count pulses and synchronize variably-timed input signals with a basic reference signal. When used in finite-state machine design, the output and next state depend on both the current input as well as the current state, with the current state resulting from previous inputs. The flip-flop stores a single bit of data, and its two possible resulting states represent either a “one” or a “zero” condition. Since it is a bistable multivibrator, the flip-flop circuit can change states when a signal is applied to one or more control inputs, conveniently resulting in one or two outputs. Indeed, it is a basic storage element used in sequential logic and a fundamental unit of digital electronic design for computer and communication systems, among others. Suggested state definition tables, transition diagrams, transition tables, K-maps for the respective logic functions, and schematics of the implementation using flipflops and logic gates for both a D flip-flop and a J-K flip-flop scenario will be given.Ī flip-flop (also called a latch), is a circuit that has two stable states and is often used to store state information (e.g., on/off, 1/0, etc.). Specifically, the counter will count up: 0, 1, 2, 3, 0, 1, 2, 3, … when the input x = 1, and count down when the input x = 0. For this project, I will show how to design a synchronous counter which is capable of storing data and counting either up or down, based on input, using either D flip-flops or J-K flip-flops.

Jk flip flop multisim