First, the circuit design is different.

1, combinational logic circuit design

The design of combinational logic circuits is relatively simple. The design process mainly involves determining the logical relationship between input and output, and selecting appropriate logic gates to realize these logical operations. Logic gates such as AND gates, OR gates and NOT gates can be used to construct combinational logic circuits. Designers need to use appropriate logic gates for connection and combination according to the requirements of logic functions.

2. Design of sequential logic circuit.

The design of sequential logic circuits is relatively complicated. Not only the logical relationship between input and output, but also the influence of timing control, state transition and clock signal should be considered. Sequential logic circuits usually use flip-flops and clock signals to realize storage and timing control. Designers need to define the state and state transition conditions of the circuit, as well as the layout of flip-flops and the introduction of clock signals.

Second, there are differences in circuit functions.

1, combinational logic circuit function

The function of combinational logic circuit is to produce output according to the current input. It has no storage function, and every input change will immediately affect the output signal. Combinatorial logic circuits are usually used to perform logical operations and encoding and decoding tasks. It can be used to implement adders, multiplexers and logical operations.

2, sequential logic circuit function

The function of sequential logic circuit depends not only on the current input, but also on the past input and the internal state of the circuit. It has a storage function, which can store the previous input state and update the output under a specific clock signal. Sequential logic circuits are usually used for sequence control and data storage tasks. It can be used to realize clocks, counters, memories and sequential logic circuits.

Practical application of logic circuit in life

First, digital alarm clock

The digital alarm clock can be set at any time, and some can also set the working day alarm clock, which is realized by logic circuit. By using the combination of AND gate and NOT gate, the alarm clock can ring at the set time on weekdays, but not on weekends.

Second, the automatic door

Automatic doors are used in many public places, such as shopping malls and libraries. When a person approaches the door, the automatic door judges whether it needs to be opened through the logic circuit, thus realizing the function of automatically opening and closing the door.