Low Power RF Section of a Passive Tag in 0.35≠m CMOS

A RF section of a long range passive tag in 0.35≠ m CMOS process has been present. It contains a voltage rectifier and a voltage regulator, which convert the RF signal into a regulated DC voltage. A PWM demodulator to decode the data from modulator RF carriers and a FSK backscatter modulator are designed. A local oscillator with the output frequency of 6.6 MHz has been calibrated by the reader’s emitting signals. The whole RF section working voltage is 2V to 3� 3V, with current dissipation 13.4≠$�DW����9. The chip area is 0.96mm 2 .

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