Some circuits depend on Negative or positive pulse also.(i.e. Then to summarise, Combinational Logic Circuits consist of inputs, two or more basic logic gates and outputs. In these Circuits the Sequences are also depended on Clock's pulse rising or falling edge. Sometimes the States of These type of Circuits is unpredictable, this happens only when the circuit is made of SR or RS flip flop. This circuits have different state depending on input and output Sequences. This can be divided into Synchronous and Asynchronous Circuits, which are clock dependent and output dependent circuits respectively.Ĥ. Can act as Storage device, can hold upto 1 bit minimum.ģ. They are both input and clock pulse dependent. The System can be programmed to count only at particular series.ġ. As standard logic gates are the building blocks of combinational circuits, bistable latches and flip-flops are the basic building blocks of sequential logic. A clock is also present with input to change the output with each clock pulse.įor Example: Consider a A Counter Circuit, which is up counter, This Sequential circuit is used to count numbers at intervals of clock pulses. The selection of the inputs is carried out by selection inputs. This is the digital circuitry that chooses one data input and directs it to output. The circuit has ‘n’ inputs, ‘m’ selection inputs with 2m n and one output. combination of these can use to store many Bits (i.e. A multiplexer is the foremost application of a combinational logic circuit. Their Circuit is made up of many latches or flip-flops. Sequential Logical Circuits are the circuits which are both input as well as Clock pulse dependent. Made of Simple Gates like AND, OR ,NOT, NAND ,EXOR etc only. The combinatinal circuits do not support bit storage (i.e. Here the output is only depended on Input sequence.Ģ. Combinational Logical Circuits are Circuits which take Input as binary sequence also the output is binary Sequence or any other control depended components connected at output.įor Example: consider a conversion of binary to BCD form, here the input are binary Sequence of 4 bits and again for each sequence there is an sequence of output in BCD form.įeatures of Combinational Logical Circuits:ġ.
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