13.56 MHz enhancement circuit for smartmx smartcard controller
First Claim
Patent Images
1. A mobile device comprising:
- a SmartMX smartcard controller;
an antenna; and
performance enhancement circuits coupled between the SmartMX smartcard controller and the antenna, wherein the performance enhancement circuits include an amplifier and a load modulation circuit, and wherein the amplifier is coupled to amplify a signal received from the antenna and to provide an amplified signal to the SmartMX smartcard controller.
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Abstract
An RFID card includes a smartcard controller that receives power from a host device. The RFID card also includes a small inductive device capable of inductive coupling with an RFID reader. The small inductive device is small enough to fit in the form factor of a memory card or SIM card. Enhancement circuits enhance the usable read and write distance of the RFID card.
271 Citations
20 Claims
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1. A mobile device comprising:
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a SmartMX smartcard controller; an antenna; and performance enhancement circuits coupled between the SmartMX smartcard controller and the antenna, wherein the performance enhancement circuits include an amplifier and a load modulation circuit, and wherein the amplifier is coupled to amplify a signal received from the antenna and to provide an amplified signal to the SmartMX smartcard controller. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A mobile device comprising:
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a SmartMX smartcard controller; an antenna; and performance enhancement circuits coupled between the SmartMX smartcard controller and the antenna, wherein the performance enhancement circuits include an amplifier and an active transmit driver circuit, and wherein the amplifier is coupled to amplify a signal received from the antenna and to provide an amplified signal to the SmartMX smartcard controller. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A mobile device comprising:
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a SmartMX smartcard controller; an antenna; an amplifier coupled to amplify signals received at the antenna and drive the SmartMX smartcard controller; and a driver circuit to drive the antenna with data provided by the SmartMX smartcard controller. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification