Author Archives: allaismt

Single-Chip Microcomputer For novices, electromagnetic interference may not pay much attention to the influence of circuit design on the input and output of the design itself, but for an electronic engineer, it is self-evident. It is not only related to the ability and accuracy of MCU in control, but also related to the competition of […]

One of the main purposes of circuit schematic design is to provide a network list for the design of pcb, and to prepare for the design of PCB. The design process of multi-layer pcb is basically the same as that of ordinary PCB, but the difference is that the wiring of the intermediate signal layer […]

In this article, the topology of buck, boost and buck-boost will be introduced from different aspects. Step down converter Figure 1 is the schematic diagram of asynchronous buck converter. The buck converter reduces its input voltage to a lower output voltage. When the switch Q1 is turned on, the energy is transferred to the output […]

“PCB is the provider of electrical connection of electronic components, and the layout of components is very important in PCB design, which will affect the final performance of products. If the layout and arrangement of components are unreasonable, the electrical and mechanical properties of the products will decrease, and it will also bring inconvenience to […]

Vias are one of the important components of multilayer printed circuit boards. The cost of drilling usually accounts for only 30% to 40% of the proofing cost of printed circuit boards. From this point of view, it is divided into two parts: a small part as the electrical connection between the layers; The other part […]

The production process of battery FPC is complicated, from cutting and drilling to packaging and shipping, there are more than 20 processes in the middle. In this long production process, according to customer demand, a variety of auxiliary materials will be used. The substrate of FPC is usually double-sided or single-sided copper foil, which is […]

With the rise of Internet of Things technology, it is more and more common for electronic products to be equipped with wireless communication function, and wireless communication technology is realized by RF circuit on PCB. Unfortunately, even PCB designers in Chengdu are often discouraged from RF circuit, because it will bring great design challenges and […]

Nanjing PCB design power supply noise The common interference source in the circuit comes from the power supply, and this interference signal is usually introduced through the power supply pin of the active device. For example, the timing diagram of A/D converter output in is shown in. The sampling speed of A/D converter is 40ksps, […]

1、 Preface At present, high-speed PCB design is widely used in the fields of communication, computer, graphics and image processing, etc. All high-tech value-added electronic product designs are pursuing the characteristics of low power consumption, low electromagnetic radiation, high reliability, miniaturization and light weight, etc. In order to achieve the above goals, via hole design […]

Cadence Allegro has almost become the actual industry standard in high-speed board design, and the latest version is Allegro 16.5. Combined with its front-end product Capture, it can complete high-speed, high-density and multi-layer complex PCB design and wiring. 01 Q: What problems should be paid attention to when wiring high-frequency signals? A: impedance matching of […]