Proximity integrated circuit card bias adjustment

摘要

A proximity integrated circuit card bias adjustment. In one example, a decoding circuit, having an decoding range, for translating a data-frame signal having an information portion and a bias portion into an output code; and a bias adjust circuit coupled to receive the output code from the decoding circuit, and adjust the bias portion of the data-frame signal such that the output code is within the decoding range is disclosed. In another example, a method for proximity integrated circuit card bias adjustment, comprising: translating a data-frame signal having an information portion and a bias portion into an output code; and adjusting the bias portion of the data-frame signal such that the output code is within a decoding range is disclosed.

主权项

1. A proximity integrated circuit card (PICC) comprising:
a decoding circuit, having a decoding value range, for translating a data-frame signal having an information portion and a bias portion into an output code; a bias adjust circuit coupled to receive the output code from the decoding circuit, and adjust the bias portion of the data-frame signal such that the output code is within the decoding value range, wherein the bias adjust circuit does not adjust the information portion of the data-frame signal; and a logic circuit coupled to the decoding circuit and for converting the output code into one of a first data-frame bit and a second data-frame bit, wherein the logic circuit includes a threshold, for translating the output code into either of the data-frame bits, which is equal to an average of a last received output code corresponding to the first data-frame bit and a last received output code corresponding to the second data-frame bit.