Gaining More Information About Branch Circuit

Branch Circuit

Have you ever heard about branch circuit? Maybe you are not familiar with this name, but you have to know that actually all homes with electricity system should be completed with this certain supply. This circuit is very important to deliver the electricity power to all appliances in your house, including to the outlets, lights, dryers, electric oven, refrigerators, and many more. Different types of appliance usually need different types of circuit. In this article, you can find more information that will help you get more knowledge about it.

Branch circuit usually consists of some different components. They are including a power source, a path for the electricity, a protection device, as well as some types of output device. However, you could also find some types of circuit that are completed with switches. This feature will be very useful to control output device, such as light as well as light switch. You can choose a certain one that meets your needs well.

You can identify branch circuit the size and type of the protection. Commonly, branch circuits for residential use are including 15, 20, 30, 40, 50, as well as 60 amps. Those are powering specific appliances. However, mostly home uses basic circuits in 15 amps. They are enough to supply power to any receptacles as well as light fixtures. Moreover, basic circuit for business requirements is 20 amps.

This kind of circuit comes to bring great advantage for your electrical system. In average, the power sent to a house nowadays is a 240-volt, 200-amp line. With the help of branch circuit, this power could be divided and sent to the needed appliances properly. The amount of the power sent to the appliances could be adjusted by varying the size of the wire. Then, in order to add more protection, breakers are added in power panel. Breaker will be a device that is responsible to protect each branch circuit from having overload current. Therefore, the risk of fire could be easily prevented.

Now, you have to notice about some warnings concerning this circuit. You have to really and extremely careful when you are working around this electrical supply since branch circuit carries huge amount of power. Usually, a certain circuit could bear at least 15 amps of electricity. This is an extremely dangerous amount that could kill you in an instance. Even if you really have to work around the circuit, you have to really aware on where the location of the circuit exactly. Besides, you also need to notice what appliances powered by the circuit and whether you might damage the circuit or not.

Now, I am sure you have understood the significance of branch circuit to be presented in your home. Always make sure that all components of your electricity system work in order, so the danger of fire or other accidents due to electrical problem could be prevented earlier.

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Sequential Circuit Design

Sequential Circuit

The digital circuits considered thus far have been combinational. Although every digital system is likely to include a combinational circuit, most systems encountered in practice also include storage elements, requiring that the systems be described as sequential circuits.

A combinational circuit and storage elements are interconnected to form a sequential circuit. The storage elements are circuits that are capable of storing binary information. The binary information stored in these elements at any given time defines the state of the sequential circuit at that time. The sequential circuit receives binary information from its environment via inputs. These inputs together with the present state of the storage elements, determine the binary value of the outputs. They also determine the values used to specify the next state of the storage elements. The next state of the storage elements is also a function of the inputs and present state. Thus, a sequential circuit is specified by a time sequence of inputs, internal states, and outputs.

Sequential Circuit Design

The design of clocked sequential circuits starts from a set of specification and culminates in a logic diagram or a list of Boolean functions from which the logic diagram can be obtained. In contrast to a combinational circuit, which is fully specified by a truth table, a sequential circuit requires a state table for its specification. Thus, the first step in the design of a sequential circuit is to obtain a state table or an equivalent representation such as state diagram.

A synchronous sequential circuit is made up of flip-flops and combinational gates. The design of the circuit consists of choosing the flip-flops and finding a combinational circuit structure which, together with the flip flops, produces a circuit that fulfills the stated specifications. The number of flip-flops is determined from the number of states in the circuit; n flip-flops can represent up to 2^n binary states. The combinational circuit is derived from the state table by evaluating the flip-flop input equations and output equations. In fact, once the type and number of flip-flops are determined, the design process involves a transformation from a sequential circuit problem into a combinational circuit problem. In this way, the techniques of combinational circuit design can be applied.

Design Procedure

This following is a procedure for the design of sequential circuits

1. Obtain either the state diagram or the state table from the statement of the problem.

2. If only a state diagram is available from step 1, obtain the state table.

3. Assign binary codes to the states.

4. Derive the flip-flops input equations from the next-state entries in the encoded state table.

5. Derive output equations from the output entries in the state table.

6. Simplify the flip-flops input equations and output equation.

7. Draw the logic diagram with D flip-flops and combinational gates, as specified by the flip-flop input equation and output equation.