What is differential wiring: Differential wiring is mainly to distinguish the signal transmission method of a traditional signal line corresponding to заземление. разностная передача сигналов в основном связана с передачей сигналов на двух проводах, and the two signals are equal in amplitude and opposite in phase. Compared to traditional single-ended
What is differential wiring: Differential wiring is mainly to distinguish the signal transmission method of a traditional signal line corresponding to заземление. разностная передача сигналов в основном связана с передачей сигналов на двух проводах, and the two signals are equal in amplitude and opposite in phase.
по сравнению с традиционными односторонними сигналами, it has the advantages of strong anti-interference, Подготовка к локализации.
How to lay out the differential line?
Two points should be paid attention to in the layout of the differential pair when designing the circuit board:
One is that the length of the two lines should be as long as possible;
The other is that the distance between the two wires (this distance is determined by the differential impedance) must be kept constant, that is, Она должна быть параллельна.
There are usually two parallel methods. One is that two lines on the PCB are run on the same side-by-side, and the other is that two lines run on two adjacent layers (over-under). Generally, Согласившись на прокладку слоя, есть больше способов добиться его. эксплоатационный разъём, it makes sense that both the signal source and the receiving end are differential signals. поэтому, it is impossible to use differential wiring for a clock signal with only one output terminal. обычно разностное сопротивление между концами приема увеличивается, and its value should be equal to the value of the differential impedance, Так что качество сигнала будет лучше. The wiring method of the differential pair should be close and parallel appropriately. правильное сближение - это значение расстояния, которое влияет на дифференциальное сопротивление., which is an important parameter for designing a differential pair. необходимость параллельности также необходима для обеспечения согласованности дифференциальных импедансов.
If the two lines are suddenly far and near, дифференциальное сопротивление будет несогласованно, which will affect the signal integrity and timing delay.