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B standard for contactless IC cards
Dec 05, 2018

TYPE B

This standard has just been developed, and its card and reader communication uses a 10% ASK modulation. That is, the difference between the information "1" and the information "0" is that the signal amplitude of the information "1" is large, that is, the signal is strong, and the signal amplitude of the information "0" is small, that is, the signal is weak. The advantage of this method is continuous signal transmission, there will be no energy fluctuations; the disadvantage is that the information is not obvious, relatively vulnerable to external interference, there will be false signals, of course, you can also use the test to make up .

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