What is a circuit and what is the basic concept of a circuit

Circuit: A conductive circuit composed of metal wires and electrical and electronic components, called an electrical circuit. Add a power supply to the input of the circuit to create a potential difference at the input terminal, and it can work when the circuit is connected.

The presence of current can be detected by some instruments, such as voltmeter or ammeter deflection, bulb light, etc.; According to the nature of the current flowing, it is generally divided into two types: the circuit through which direct current passes is called "DC circuit", and the circuit through which alternating current passes is called "alternating current circuit".

According to a certain task, the required devices are connected with wires to form a circuit. The circuit is the main component of the power system, control system, communication system, computer hardware and other electrical systems, which plays the role of generation, transmission, conversion, control, processing and storage of electrical energy and electrical signals.

The simplest circuit is composed of power supply, electrical appliances (loads), wires, switches and other components. When the circuit is on, it is called a path, and when it is disconnected, it is called an open circuit. Only in the path can there be an electric current passing through the circuit.

A break in a circuit is called an open circuit or an open circuit. If there is no load between the positive and negative poles of the power supply in the circuit and it is directly connected, it is called a short circuit, and this situation is never allowed. Another type of short circuit is when the two ends of a component are directly connected, and the current flows through the direct connection without passing through the component, which is called a short circuit of the component.

An open circuit (or open circuit) is allowed, but the first short circuit is never allowed, because the short circuit of the power supply will cause the power supply to burn out, and the short circuit of the electrical appliance will lead to the occurrence of the phenomenon that the electrical appliances and meters cannot work normally.

Categories: Medical Diseases >> Obstetrics & Gynaecology.

Analysis: What is a circuit?

The road taken by the car is called the road, and the road taken by the train is called the railway. We all know that in order for the current to do work, it must be made to flow according to the specified route, and we call the route taken by the current a circuit. Unlike railways and highways, which can be extended and shortened at will, there are ends and ends, but the circuit is a closed loop.

In this way, current can flow in a closed loop, as shown in Figure 1-6. A circuit is composed of a generator (battery) that generates electrical energy, electrical appliances such as electric motors, lights, etc., and electrical auxiliary equipment such as switches, meters, etc. In order for current to pass through the circuit, the electrical switches in the circuit must be closed; To stop the current from flowing, simply turn on the electrical switch in the circuit.

It's like if we want to cross a river, we first have to build a bridge, and we can't walk through it if we tear down the bridge.

What is a circuit?

A circuit is a network of interconnected electrical and electronic devices, such as resistors, capacitors, inductors, diodes, transistors, and switches. The size of the circuit can vary greatly, from an integrated circuit on a silicon wafer to a transmission grid. Depending on the signal being processed, electronic circuits can be divided into analog circuits and digital circuits.

Analog circuits process the current and voltage of the signal. The most typical analog circuit applications include: amplification circuits, oscillation circuits, linear operation circuits (addition, subtraction, multiplication, division, differentiation, and integration circuits).

In digital circuits, the signal size represents only a finite state, and most Boolean algebraic logic is used to process the signal. Typical digital circuits include oscillators, registers, adders, subtractors, etc.

All circuits follow some basic circuit laws.

Kirchhoff's Law of Currents: The sum of the currents flowing into a node is equal to the sum of the currents flowing out of the node.

Kirchhoff's Voltage Law: The sum of the loop voltages is zero.

Ohm's Law: The voltage across the resistor is equal to the product of the resistance value and the current flowing through the resistor.

Norton's theorem: Any two-terminal network consisting of a voltage source and a resistor can always be equivalent to a parallel network of an ideal current source and a resistor.

Thevenin's theorem: Any two-terminal network consisting of a voltage source and a resistor can always be equivalent to a series network of an ideal voltage source and a resistor.

Under the action of the non-electrostatic force of the power supply, the same kind of charged particles will move directionally, and the positive charge will move to the negative pole of the power supply, and the negative charge will move to the positive pole of the power supply. The directional movement of charged particles is the current current, and the direction of the positive charge movement is generally specified as the positive direction of the current. The current that does not change the direction of the current with time is called direct current, and the current that changes the direction of the current with time is called alternating current.

The distinction between DC and AC is only the direction of the direction, and has nothing to do with other quantities. Electric current, although it has a direction, is a scalar quantity.

The path through which the current flows is the circuit. In a closed circuit, the transfer and conversion of electrical energy is realized. The circuit consists of a power supply, connecting wires, switching appliances, loads and other auxiliary equipment.

The power supply is the equipment that provides electrical energy, and the function of the power supply is to convert non-electric energy into electrical energy, such as batteries to convert chemical energy into electrical energy, generators to convert mechanical energy into electrical energy, solar cells to convert solar energy into electrical energy, nuclear energy to convert mass into energy, etc. Dry batteries, accumulators, generators, etc. are the most commonly used power sources. A load is a device that consumes electrical energy in a circuit, and the function of a load is to convert electrical energy into other forms of energy.

For example, electric furnaces convert electrical energy into thermal energy, and electric motors convert electrical energy into mechanical energy. Lighting appliances, household appliances, machine tools, etc. are the most common loads. Switching appliances are load control equipment, such as knife switches, circuit breakers, electromagnetic switches, pressure reducing starters, etc.

Auxiliary equipment includes various relays, fuses and measuring instruments. Auxiliary equipment is used to control, distribute, protect and measure circuits. Connecting wires connect power supplies, loads, and other equipment into a closed loop, and the connecting wires are used to transmit electrical energy or telecommunication signals.

<> is a source file written by a programmer in a language supported by a development tool, and is a clear set of rules for representing information in discrete form by characters, symbols, or signal symbols. **The design principles include unique certainty, standardization and versatility, scalability and stability, easy recognition and memory, short and uniform format, and easy modification.

The source is a fork of the source, in a sense, the source is equivalent to the source. In modern programming languages, sources can be in the form of books or tapes, but the most common format is text files, which are typically used to compile computer programs. The ultimate purpose of a computer source is to translate human-readable text into a computer-executable binary instruction, a process called compilation, which is done through a compiler.

A conductive circuit that consists of metal wires and electrical and electronic components is called a circuit. The simplest circuit consists of a power supply load and wires, switches, and other components that are connected in a certain way to provide a path for the flow of charge.

And gate (English: and gate) is also known as "and circuit".Logic "product", logic "and" circuit. It is the basic logic gate circuit that performs the AND operation.

There are multiple inputs, one output. The output is high when all inputs are high (logic 1) at the same time, otherwise the output is low (logic 0).

Specifics. 1. When ua=ub=0v, d1 and d2 are positively biased, and both diodes will be turned on, at this time, uo is the potential, and the output is low.

2. When UA, UB is high and low, we may wish to assume UA = 3V, UB = 0V, then we might as well start the analysis from D2, D2 will be turned on, and the voltage drop of D2 will be limited after conduction, then D1 will be reversed biased and cut off because the right side is left and 3V, so the last UO is a low-level output.

Here you can also start the analysis from D1, if D1 is on, then UO should be, at this time D2 will be on, then D2 will be on, the pressure source will drop and the field tremor state will change back, the final state UO is still the output low level, and the hole will be cut off immediately when D1 is fast.

3. va=vb=3v, this situation is very easy to understand, d1, d2 will be positively biased, uy is limited to.

Summary (to borrow a definition): Usually after the diode is turned on, if its cathode potential is constant, then its anode potential is fixed at a higher potential than the cathode; Then fix its cathode potential at a lower potential than the anode, and people call this effect of the diode after conduction is called clamping. (Special note:.)

The diode with a large differential voltage is pilot-on, clamped first, and the diode with the pilot-on has circuit control).

with the door"is a basic logic gate circuit, also known as:"with logic gates"。It is a circuit consisting of two or more input signals and an output signal. The output signal of the AND gate is only output high when all input signals are high (1), otherwise the output is low (0).

The logic of the AND gate can be expressed in the following truth table: input a input b output 0 0 00 1 01 0 01 1 1 It can be seen that the output signal of the AND gate will be high only when all input signals are high. Otherwise, the output signal is low.

AND gates are widely used in digital circuits, for logic operations, data processing and control. It's the foundation for building more complex logical features.

Meaning of circuit: A conductive circuit composed of metal wires and electrical and electronic components, which is called a circuit.

A closed circuit formed by a power supply, electrical appliances, and wires is a circuit.

A circuit is a path of electricity or signal.

A conductive circuit that consists of metal wires and electrical and electronic components is called a circuit. The circuit through which direct current passes is called a "DC circuit"; The circuit through which the alternating current passes is called an "alternating current circuit".

The simplest circuit is composed of components such as power supply, load, wires, and switches.

A circuit is the path through which an electric current passes.