Category Archives: Uncategorized

Firstly, this paper analyzes the key technologies of GSM communication system, introduces the system composition and working principle of GSM mobile phone baseband and radio frequency in detail, and further analyzes and studies the platform MTK6225 provided by MediaTek, as well as the hardware design and basic debugging of GSM mobile phone on this platform. […]

CadenceAllegro is now almost the actual industry standard in high-speed board design. The latest version is Allegro16.5 released in May 2011. Combined with its front-end product Capture, it can complete high-speed, high-density and multi-layer complex PCB design and wiring. Allegro has the advantages of easy operation, friendly interface and powerful functions (such as simulation, signal […]

The thermal, mechanical and electrical behavior of each PCB depends on the material characteristics of PCB substrate, conductor and component materials. Among these different materials, PCB designers can control the behavior of the board to the greatest extent by choosing the right PCB substrate material. The performance of PCB materials, especially the performance of resins […]

NT98525/8 is a highly integrated AI video SoC with the characteristics of high image quality, low bit rate and low power consumption, which can be applied to the development of 4Mp/5Mp/4K intelligent IP cameras. This SoC integrates ARM Cortex A9 CPU core, the latest generation ISP,H.265/H.264 video compression codec, high-performance hardware DLA module, graphics engine, […]

1.PCB wiring and layout isolation criteria: strong and weak current isolation, large and small voltage isolation, high and low frequency isolation, and input and output isolation. The demarcation standard is one order of magnitude difference. The isolation method includes: the space is far away and the ground wire is separated. 2. The crystal oscillator should […]

January 11th, 2021, Santa Clara, California, USA Ambarella (hereinafter referred to as “AMBA Semiconductor”, NASDAQ: AMBA, a semiconductor company focusing on artificial intelligence vision) announced the launch of CV5, the latest chip in CVflow® series. This artificial intelligence vision processor can support 8K video recording or 4K video stream recording with four independent image inputs. […]

Before the patch processing in Xi ‘an SMT small batch patch processing factory, there is a process that is not particularly noticed, that is, baking. Some circuit boards in the electronics factory that don’t meet the requirements of Xi ‘an SMT chip processing due to long storage time and humidity in the storage environment can […]

Dot matrix board (universal circuit board/hole board) is a kind of printed circuit board (PCB) which is covered with pads according to the standard IC pitch (2.54mm) and can be inserted with components and connections according to one’s own wishes, commonly known as “hole board”. Compared with professional PCB plate making, hole plate has the […]

1. Xilinx ISE traditional FPGA design process The basic process of developing FPGA by using Xilinx ISE software includes code input, function simulation, synthesis, simulation after synthesis, implementation, simulation and verification after wiring and debugging after work. 1) circuit design or code input The design of FPGA can directly draw the schematic diagram, but in […]

Signal Integrity (SI) of high-speed PCB board design is abbreviated as SI. Definition: The quality of the signal on the signal line is the ability of the signal to respond with the correct timing and voltage in the circuit. High switching speed of integrated circuit chips (IC) or logic devices, incorrect layout of terminal elements […]