Today, I repaired a batch of servo drivers. When powered on, I measured various voltages and found no output, with some issues appearing intermittently. The chip used is the UC2842, and the supply voltage was alarmingly low. I measured the startup resistor, supply capacitor, and supply diode, all of which were normal, leading me to … Read more
Article Summary This article analyzes twisted pair Ethernet using a mixed-signal oscilloscope as the analytical tool, delving into the encoding of two common types of twisted pair Ethernet. It also examines and verifies the signal transmission of Ethernet at the physical layer, concluding with a practical example comparing the data received by software in an … Read more
Abstract: With the increasing demands for signal transmission rates or resolution in fields such as wireless communication, radar, satellite communication, and optical communication, the modulation schemes used have become increasingly complex, and the signal bandwidth has widened. Modern real-time oscilloscopes, due to advancements in chip and material technology, can now provide real-time measurement bandwidths of … Read more
01 What made me curious about passive probes It all started with a question: can a 1X passive probe be used to match a 50-ohm or 75-ohm system like a coaxial cable? Experienced individuals would immediately say no, because even a 1X probe has a significant resistor in series. I happened to have a broken … Read more
With the rapid development of electronic technology, communication signal frequencies are increasing, and the quality requirements for signals are becoming more stringent. Is it enough to just choose an expensive oscilloscope to measure these high-speed signals? Not necessarily; if some details are overlooked, even the most expensive oscilloscope may not provide accurate measurements! 1. Bandwidth … Read more
There are many key indicators for measuring the quality of an oscilloscope testing system, and the “Effective Number of Bits (ENOB)” is crucial for understanding the entire measurement system. This article will discuss the effective bits of oscilloscopes, the impact of ENOB on actual signal testing, and provide methods for solving it using EXCEL in … Read more
Power consumption is a critical performance metric in chips, sometimes even determining the success or failure of a chip. As is well known, the recent “Snapdragon Fire Dragon” incident significantly impacted the market share of this chip. For industrial-grade and automotive-grade chips, the impact of power consumption is not very apparent. However, for consumer-grade chips … Read more
Concept of Low Power In the design of embedded systems, low power design is a challenge that many designers must face. This is because embedded systems are widely used in portable and mobile products, which often do not have a constant power supply and rely on batteries for power. Therefore, designers consider every detail to … Read more
Accurate thermal analysis plays a crucial role in the design of many electronic products, particularly in high-end PCB design. The results of thermal analysis often influence the mechanical layer design of the PCB and the product’s enclosure: whether to install heat sinks, cooling fans, etc. If a cooling fan is installed, it often needs to … Read more
In the rapid development of the smart home field, low power design has become a core challenge for PCB design engineers. Smart home devices often require long standby times or rely on battery power, making power consumption requirements extremely stringent. This article will delve into low power design strategies for PCBs in smart home products, … Read more