How to analyze basic circuit elements in high-speed circuits?

乱世煮酒论天下

How to analyze basic circuit elements in high-speed circuits? [Copy link]

The basic circuit components are mainly resistors, capacitors and inductors. In ordinary circuits, these three types of devices are completely designed and analyzed according to lumped circuit parameters. However, in high-speed circuits, these three types of devices are not completely analyzed according to discrete components. For example, in high-speed circuits, why is the resistance value larger as the frequency increases? It is the resistance value rather than the impedance. I used to think that resistors may have equivalent series inductance in high-speed circuits, and the higher the frequency of inductance, the greater the inductance, but the resistance increases with the increase of frequency? What is the reason for this? What materials can you recommend about the design and analysis of high-speed circuits?

qwqwqw2088

According to Ohm's law, the resistance of a pure resistor itself does not change with frequency; it is a constant.

According to what was said above, directly saying "resistance increases with increasing frequency" may cause misunderstanding.

qwqwqw2088

But in high frequency, the so-called high frequency is the frequency from hundreds of kHz to hundreds of GHz. The resistance may appear to be affected by frequency, but this phenomenon is caused by other factors rather than changes in the properties of the resistor itself.

The "non-resistance properties" of high-frequency circuit resistors have been summarized and studied by experts, and there are numerous books, papers, and online and offline materials...

qwqwqw2088

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乱世煮酒论天下

qwqwqw2088 posted on 2024-5-1 09:31 According to Ohm's law, the resistance of a pure resistor does not change with the frequency, it is a constant. According to the above statement, it is better to say "resistance...

This is what I read in a book. I still don't understand it. It talks about the essence of magnetic bead filtering. The title of the book is High-Speed Circuit Principles and Design. I will post the book when I have time.

Nubility

It is not surprising that the losses of electromagnetic waves of different frequencies in the same material are different.

chunyang

The parameters of an ideal RLC component are independent of frequency. Actual components cannot be considered ideal components at high frequencies/high speeds because of the influence of "distributed parameters" or "parasitic parameters." Within a specific frequency spectrum, RLC components and their distributed parameters can be analyzed by integrating RLC components with different parameters.