INFORMATION PROCESSING DEVICE AND RECEIVING METHOD
First Claim
1. An information processing device comprising:
- a wireless antenna configured to perform contactless communication using electromagnetic coupling;
an IQ detection unit configured to subject a signal received by the wireless antenna to IQ detection;
an ASK detection unit configured to subject the signal received by the wireless antenna to ASK detection;
a first AGC circuit configured to control a gain for the signal subjected to the IQ detection by the IQ detection unit;
a second AGC circuit configured to control a gain for the signal subjected to the ASK detection by the ASK detection unit;
a demodulation circuit configured to perform predetermined demodulation processing on an output of the first AGC circuit or an output of the second AGC circuit; and
a control unit configured to receive information of control voltage levels from the first AGC circuit and the second AGC circuit, and control, in response to the information of the control voltage levels, supply of one of the outputs of the first AGC circuit and the second AGC circuit to the demodulation circuit, by switching between the outputs of the first AGC circuit and the second AGC circuit.
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Accused Products
Abstract
A receiving method includes the steps of: performing contactless communication using a wireless antenna and electromagnetic coupling, subjecting a signal received by the wireless antenna in the communication step to IQ detection, subjecting the signal received by the wireless antenna in the communication step to ASK detection, firstly automatically controlling a gain for the signal subjected to the IQ detection in the IQ detection step, secondly automatically controlling a gain for the signal subjected to the ASK detection in the ASK detection step, performing predetermined demodulation processing on an output of the first AGC step or second AGC step, and receiving information of control voltage levels in the first AGC step and the second AGC step and controlling supply of one of the outputs of the first and second AGC steps to the demodulation step by switching between the outputs of the first and second AGC steps.
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Citations
8 Claims
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1. An information processing device comprising:
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a wireless antenna configured to perform contactless communication using electromagnetic coupling; an IQ detection unit configured to subject a signal received by the wireless antenna to IQ detection; an ASK detection unit configured to subject the signal received by the wireless antenna to ASK detection; a first AGC circuit configured to control a gain for the signal subjected to the IQ detection by the IQ detection unit; a second AGC circuit configured to control a gain for the signal subjected to the ASK detection by the ASK detection unit; a demodulation circuit configured to perform predetermined demodulation processing on an output of the first AGC circuit or an output of the second AGC circuit; and a control unit configured to receive information of control voltage levels from the first AGC circuit and the second AGC circuit, and control, in response to the information of the control voltage levels, supply of one of the outputs of the first AGC circuit and the second AGC circuit to the demodulation circuit, by switching between the outputs of the first AGC circuit and the second AGC circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A receiving method comprising the steps of:
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performing contactless communication using a wireless antenna and electromagnetic coupling; subjecting a signal received by the wireless antenna in the communication step to IQ detection; subjecting the signal received by the wireless antenna in the communication step to ASK detection; firstly automatically controlling a gain for the signal subjected to the IQ detection in the IQ detection step; secondly automatically controlling a gain for the signal subjected to the ASK detection in the ASK detection step; performing predetermined demodulation processing on an output of the first AGC step or an output of the second AGC step; and receiving information of control voltage levels in the first AGC step and the second AGC step, and controlling, in response to the information of the control voltage levels, supply of one of the outputs of the first AGC step and the second AGC step to the demodulation step, by switching between the outputs of the first AGC step and the second AGC step.
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Specification