When testing the frequency inductance, the problem with the compensation value is often confused, such a small partner who has just contacted such products, such a small inductance, why do you add compensation values to calibrate on the basis of testing? How do you handle this compensation value in the actual line design?
The true face of the compensation value
The schematic diagram of the measurement of RF electrical inductance amount, for the residual factors and discrete factors of the test fixture, the general practice of the industry is to describe the F parameters shown below:
First measure two basic data about test fixtures:
The relationship between ZX and ZOM, ZSM, and ZXM is as follows:
The amount of radio frequency inductance can be drawn by the following example:
in:
LX: RF inductance true electrical
LXM: Measuring the inductance of the radio frequency inductance of the instrument
LSC: The inductance amount reading of the short circuit block measured by the instrument
From this, the true electrical value of the RF inductor is not a test instrument measurement reading, but is equal to the measurement reading of the test instrument plus the LSC. This LSC is defined to write into a specification of RF inductance to the compensation value.
Reasons for introducing RF inductance compensation values
Why introduce this concept of compensation value in the electrical energy indicator of RF inductance? Does this do this?
Since the small radio frequency inductance is too subtle and sensitive, it is sufficient to affect the measurement results when the measurement is sufficient to affect the measurement results, so that the amount of inductance read out from the radio frequency inductance is exemplarous, but now there is no Invention The method of measuring the amount of inductance without measuring the fixture is actually described to accurately describe the relationship between test readings and real electrical inductance.
The compensation value of RF inductance is a commonly known as the industry, and is actually the remaining inductance of the short block used in the system.
How to deal with the compensation value of RF inductance when practical
How to deal with radio frequency inductance compensation value in actual line design? Need to add a compensation circuit?
The compensation value of the RF inductor is only the concept introduced when the calibration inductance value is characterized, and as long as the compensation value is added to the actual application, there is no need to increase the compensation circuit.
On the one hand, the PCB area is not allowed to increase the line periphery in such a densely arranged small device, on the other hand, the cost and debugging time of the increased compensation circuit are far less than replacing the radio frequency inductance of the adjacent electrolyte value. Coordinate.
Since the RF inductance compensation value cannot be eliminated, then the manufacturer cannot use a unified compensation value. If it is implemented, the user will be more convenient to replace.
Difficult, on the one hand, since the short-circuit block itself is a standard piece, it is not possible to calibrate short blocks with a more accurate instrument; on the other hand, it is possible to test the system of different manufacturers in the world.
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