This type of circuit or device is being used in order to store binary numbers.
However, there are some digital devices or circuits, the output of which if once set, does not undergo any sort of a change in spite of a change in its input levels (i.e. That’s if the input state of these circuits is altered, their output states will also primarily be changed. The outputs of logic or digital circuits (combinational circuits, which we have already studied in the previous chapters), completely depends on their inputs. Block diagram indicates that external outputs of a sequential circuit also depends on present state of memory elements apart from external inputs.įigure 5.1 – block diagram of a sequential circuit These inputs, indicate binary values on output terminals by means of mixing with existing memory elements. Sequential circuits receive binary information via extrinsic inputs.
The binary information stored within memory elements at a given period of time, explicates the state of a sequential circuit. Memory elements are devices which have a capacity to store binary information within it. A sequential circuit comprises a feedback path between combinational circuit and memory elements, as has been represented by a block diagram of the sequential circuit in figure 5.1. flip-flop is a basic chip which is being used on a sequential circuit. In other words, basic feature of a sequential circuit has been memory or sequential circuits are a type of circuits, which have a capacity to store binary numbers. these circuits are manufactured through the assistance of different logic gates), whereas sequential logic circuits are used in timing and memory devices and flip-flop serve as a building block on them. In combinational logic circuits (about which we have already read in the previous chapters) gates serve as basic building block (i.e. The following types expounds the difference between operations of these two types of logic circuits. Logic circuit is normally divided into two types. Flip-flops are mostly used in the construction of registers, counters and timers etc. Flip-flop is a basic memory element and it is also known as a bistable multi – vibrator. It is a prominent feature of a flip-flop that as long as status of its input signal is not changed, it remains indefinitely on any one of the afore – mentioned two states (as long as power is transmitted on the circuit). In other words, a digital element, which can store only one bit of a binary data, is known as a flip-flop. Flip-Flop Combinational logic circuits and Sequential logic circuits- Flip-flop is a memory element, which can store at a time either binary 1 or binary 0.
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