Positive feedback latch amplitude limiting control circuit and method of passive radio frequency identification tag
A technology for identifying tags and passive radio frequency, applied in the field of radio frequency identification, can solve problems such as lack of communication distance, achieve the effect of no static power consumption, easy implementation, and reduced leakage current
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Embodiment 1
[0044] A positive feedback latch limiter control circuit of a passive radio frequency identification tag described in the present invention, such as figure 1 As shown, it includes a resonant circuit, a rectifier circuit and an energy storage capacitor C2, and the circuit also includes a signal generating circuit, a signal processing circuit and a discharge circuit,
[0045] The signal generation circuit is connected between the output terminal of the rectification circuit and the ground, and is used to generate the first control signal S1 that changes with the change of the magnetic field strength coupled to the passive RFID tag coil, and input the first control signal S1 to the signal processing circuit and the leakage circuit, and receive the logic signal S2 returned by the signal processing circuit;
[0046] The signal processing circuit is connected between the output terminal of the rectifier circuit and the ground, and is used to receive the first control signal S1, and ...
Embodiment 2
[0060] Figure 5 It is a block diagram of the circuit structure of Embodiment 2 of the present invention. In this embodiment, the positive feedback latch limiter control circuit includes a resonant circuit, a rectifier circuit and an energy storage capacitor C2, and the circuit also includes a signal generating circuit. The first signal a processing circuit and a first bleeder circuit, and a second signal processing circuit, a second signal control circuit and a second bleeder circuit,
[0061] The signal generation circuit is connected between the output terminal of the rectification circuit and the ground, and is used to generate the first control signal S1 that changes with the change of the magnetic field strength coupled to the passive RFID tag coil, and input the first control signal S1 to the first signal processing circuit, the first discharge circuit, and the second signal processing circuit, and receive the logic signal S2 returned by the first signal processing circ...
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