Radio frequency identification device having nonvolatile ferroelectric memory
AssigneeHynix Semiconductor Inc.
InventorsHee Bok Kang, Jin Hong An, Suk Kyoung Hong
Life of this patent
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Abstract
A RFID device having a nonvolatile ferroelectric memory includes an analog block. A power-on reset unit configured to sense a power voltage and output a power sensing signal is included in the analog block. A radio frequency signal sensing unit is configured to sense the level of a detecting signal corresponding to a radio frequency signal received by the antenna of the RFID device and outputs a radio frequency sensing signal. A power-on reset mixer is configured to synthesize the power sensing signal and the radio frequency sensing signal and outputs a power-on reset signal according to the voltage levels of the power sensing signal and the radio frequency sensing signal.
Claims22
An RFID device having a nonvolatile ferroelectric memory, receiving a radio frequency signal, and generating a power voltage for driving the RFID device, the RFID device comprising:
- a power-on reset unit configured to sense the power voltage in order to output a power sensing signal;
- a demodulator configured to demodulate the radio frequency signal and outputting a detecting signal;
- a radio frequency signal sensing unit configured to sense a voltage level of the detecting signal corresponding to the radio frequency signal, and outputting a radio frequency sensing signal according to the sensed voltage level;
- and
- a power-on reset mixer configured to receive the power sensing signal and the radio frequency sensing signal, and outputting a power-on reset signal according to the voltage levels of the power sensing signal and the radio frequency sensing signal,
- wherein the radio frequency signal sensing unit comprises:
- a power generating unit configured to adjust an effective resistance in response to a change in the level of the power voltage in order to output a first voltage having a given level;
- a delay unit configured to delay the detecting signal for a given time in response to the first voltage in order to output a detecting delay signal;
- and
- a radio frequency signal generating unit configured to perform a logical operation on the detecting signal and the detecting delay signal in order to generate the radio frequency sensing signal.
Dependencies are inferred from the claim text.