RF identification device with near-field-coupled antenna

摘要

An embodiment of a RF identification device is formed by a tag and by a reader. The tag is formed by a processing circuit and a first antenna, which has the function both of transmitting and of receiving data. The reader is formed by a control circuit and by a second antenna, which has the function both of transmitting and of receiving data. The processing circuit is formed by a resonance capacitor, a modulator, a rectifier circuit, a charge-pump circuit and a detection circuit. The antenna of the tag and the processing circuit are integrated in a single structure in completely monolithic form. The first antenna has terminals connected to the input of the rectifier circuit, the output of which is connected to the charge-pump circuit. The charge-pump circuit has an output connected to the detection circuit.

主权项

1. An RF identification device, comprising;
a capacitor; a first antenna disposed on a single die and having turns that surround an area of the single die; a processing circuit including a detection circuit, a modulator and a rectifier stage, said modulator being arranged between said first antenna and said rectifier stage, wherein said rectifier stage comprises a positive rectifier and a negative rectifier; wherein the single die is in completely monolithic form such that the processing circuit and the capacitor are disposed in the surrounded area; and wherein said processing circuit further comprises a booster stage including a first booster circuit and a second booster circuit, wherein an input of said first booster circuit is electrically coupled to an output of said positive rectifier and an input of said second booster circuit is electrically coupled to an output of said negative rectifier.