In the normal circuit board design process, we can find that the circuit is always crooked. We all know that the shortest straight line between two points. Then why is the circuit on the circuit board designed to be bent? Can't it be directly designed as a straight line?
First of all, we have to understand a concept, that is, the line is not as short as possible, and as direct as possible. For circuit boards, stability is the first priority.
At the same time, the integrity of the signal must be maintained for the chip to work normally. For example, DDR memory sticks are high-speed PCBs. Open the eye diagram during data communication. If you do not follow the routing rules, it will directly cause data errors. In severe cases, even the machine will not be able to open. On the green circuit board, there are chipsets of different sizes, with different frequencies. When the machine is operating, coordination and cooperation between components are required, and the places where the connection can be very short are also forced to be elongated, so that the interface synchronization signal can be correct. It looks messy, but in fact, every circuit in it has been carefully planned, which has a lot to do with clock frequency and even hardware.
Why are the lines on the circuit board always crooked? In summary, there are three points:
1. Consideration of the size of electronic products. If the lines in the circuit board are designed to be straight, the area of the circuit board will increase several times. In this era of pursuit of exquisiteness, the area of the circuit board is naturally as small as possible, otherwise it will directly affect the area of electronic products. Nowadays, people’s requirements for electronic products are: Except for the bigger the screen, the other things are getting smaller and smaller, and the thickness should be as thin as possible.
2. Avoid material waste and quality problems. In the circuit board, the line must be turned. If we design the circuit board in a straight line, the angle of the turn will reach ninety degrees. Because the circuit is prone to reflection when turning at ninety degrees, such a circuit board can easily be broken during the production process. In this case, not only will it cause waste of materials, but even if the circuit board is successfully manufactured, it is also prone to quality problems.
3. Ensure signal integrity. Different parts are distributed on a circuit board, there are various power sources, various capacitors, resistors, etc. When each part is combined together, it will interfere with each other, so this must be taken into account in the design. With this kind of curved wiring, the signal delay difference between the various parts will be kept within a range, so that it will not cause confusion when reading. A bad wiring will degrade the performance of the product, and sometimes even affect the success rate of the product, so regardless of a small wiring, there are still many involved.
Therefore, although the lines on the circuit board are always twisty and unintelligible to ordinary people, they actually contain great wisdom!
First of all, we have to understand a concept, that is, the line is not as short as possible, and as direct as possible. For circuit boards, stability is the first priority.
At the same time, the integrity of the signal must be maintained for the chip to work normally. For example, DDR memory sticks are high-speed PCBs. Open the eye diagram during data communication. If you do not follow the routing rules, it will directly cause data errors. In severe cases, even the machine will not be able to open. On the green circuit board, there are chipsets of different sizes, with different frequencies. When the machine is operating, coordination and cooperation between components are required, and the places where the connection can be very short are also forced to be elongated, so that the interface synchronization signal can be correct. It looks messy, but in fact, every circuit in it has been carefully planned, which has a lot to do with clock frequency and even hardware.
Why are the lines on the circuit board always crooked? In summary, there are three points:
1. Consideration of the size of electronic products. If the lines in the circuit board are designed to be straight, the area of the circuit board will increase several times. In this era of pursuit of exquisiteness, the area of the circuit board is naturally as small as possible, otherwise it will directly affect the area of electronic products. Nowadays, people’s requirements for electronic products are: Except for the bigger the screen, the other things are getting smaller and smaller, and the thickness should be as thin as possible.
2. Avoid material waste and quality problems. In the circuit board, the line must be turned. If we design the circuit board in a straight line, the angle of the turn will reach ninety degrees. Because the circuit is prone to reflection when turning at ninety degrees, such a circuit board can easily be broken during the production process. In this case, not only will it cause waste of materials, but even if the circuit board is successfully manufactured, it is also prone to quality problems.
3. Ensure signal integrity. Different parts are distributed on a circuit board, there are various power sources, various capacitors, resistors, etc. When each part is combined together, it will interfere with each other, so this must be taken into account in the design. With this kind of curved wiring, the signal delay difference between the various parts will be kept within a range, so that it will not cause confusion when reading. A bad wiring will degrade the performance of the product, and sometimes even affect the success rate of the product, so regardless of a small wiring, there are still many involved.
Therefore, although the lines on the circuit board are always twisty and unintelligible to ordinary people, they actually contain great wisdom!
