Anova Law Group, PLLC
Oscillation maintenance circuit with trigger-based pulse generation in half-duplex RFID transponders
A half-duplex RFID oscillation maintenance circuit with trigger-based pulse generation is provided, including: a resonance inductor and a resonance capacitor forming an L-C resonance circuit coupled to an external radio frequency field to generate alternating current for a rectifier circuit, which is connected to an energy-storage capacitor. A first antenna end is connected to a trigger circuit through a switch unit and a resistor connected in series; and an output end of the trigger circuit is connected to a control end of the switch unit. The trigger circuit is configured to sample an oscillation signal at the first antenna end to generate a rectangular wave signal, whose pulse width can be self-adaptively adjusted, to control OFF/ON of the switch unit and, when the switch unit is ON, to form a current injection loop from the energy-storage capacitor to the L-C resonance circuit.
EXCELIO TECHNOLOGY (SHENZHEN) CO., LTD.
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G06K H03B G06K G06K
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Fuqiang Patrick Bian Qianwen
Han Wu Zhang