ADAPTIVE BIAS TUNING

摘要

The present disclosure relates in general to devices, systems and methods for wireless communication, and in particular to communication using a proximity integrated circuit card (PICC). Example embodiments include a circuit (100) for a PICC, the circuit comprising an input stage (101), a decoding module (106) and a bias adjustment module (117), the bias adjustment module (117) configured to receive an output code from the decoding module and provide a bias adjustment signal to the input stage (101), the bias adjustment module (117) configured to iteratively tune the bias adjustment signal based on a measurement of the output code, with successive steps tuning the bias adjustment signal by a smaller amount until the output code is within a decoding range.

主权项

1. A circuit for a proximity integrated circuit card, the circuit comprising:
an input stage having a first input for connection to a radio antenna to receive an input signal, a second input for adjustment of a bias of the input stage and an output for providing a bias adjusted input signal; a decoding module connected to the input stage and configured to provide an output code from the bias adjusted input signal; and a bias adjustment module connected to receive the output code from the decoding module and configured to provide a bias adjustment signal to the second input of the input stage, wherein the bias adjustment module is configured to iteratively tune the bias adjustment signal based on a measurement of the output code, with successive steps tuning the bias adjustment signal by a smaller amount until the output code is within a decoding range.