The amplifier circuit can increase the output power of a signal. It obtains energy from the power supply to control the output signal waveform to be consistent with the input signal but with a larger amplitude. In this sense, the amplifier circuit can also be viewed as a controllable output power source used to achieve … Read more
Experiment Objective:1. Understand computer storage systems;2. Use Proteus simulation software to draw equivalent circuit diagrams and verify static random access memory (SRAM) chips;3. 6116 memory chip;4. 74LS245 chip, 74LS373 chip.Basic Principle: This experiment aims to verify the static random access memory chip, so the 6116 is selected as the memory chip. The 74LS373 chip is … Read more
1. Usage of Multimeters 1. Understanding Common Symbols on Multimeters Types of electrical measurements and switch positions: ACV (or V) — AC voltage range, typically includes 2.5V, 10V, 50V, 250V, 500V, etc. DCV (or V) — DC voltage range, typically includes 0.5V, 2.5V, 10V, 50V, 250V, 500V, etc. DCmA (or mA) — DC milliamp range, … Read more
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