Signal converter, RFID tag having signal converter, and method of driving RFID tag

A radio frequency identification (RFID) tag, comprising:

• a first conversion circuit which converts a first incoming analog signal into a power signal and a demodulation signal, amplifies the demodulation signal such that a value of a predetermined reference signal is included in a peak-to-peak range of the demodulation signal, and outputs a digital signal using the amplified demodulation signal;
• a memory which stores tag data;
• a second conversion circuit which converts the tag data into a second analog signal and outputs the converted signal;
• and
• a controller which reads out tag data from the memory in response to the digital signal and controls the operation of the second conversion circuit in response to the read tag data.

A method of driving a radio frequency identification (RFID) tag, comprising:

• rectifying and smoothing a first incoming analog signal to generate a power signal and a first demodulation signal;
• amplifying the first demodulation signal to output a second demodulation signal such that a value of an externally-supplied reference signal is included in a peak-to-peak range of the second demodulation signal;
• and
• converting the second demodulation signal into a digital signal in response to the power signal.