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AssigneesExcelio Technology (Shenzhen) Co., Ltd., Wuxi Excelio Technology Co., Ltd.
InventorsPatrick Bian Wu, Wei Xu, Fuqiang Han, Shehu Qi, Yuanming Luo
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A radio frequency identification (RFID) tag and a low dropout regulator (LDO) circuit consuming ultra-low power. The circuit is connected to a first threshold unit and a second threshold unit respectively and in series at a first voltage dividing resistor (R1) bypass and a second voltage dividing resistor (R2) bypass; utilizes the inherent threshold property of a unidirectional conductive diode or a MOS tube in the threshold units, and the voltage difference between the positive input terminal of an error-correction differential amplifier and a voltage output terminal (Vout), and the voltage differences between the voltage of the positive input terminal to the voltage output terminal and the voltage of the positive input terminal to a ground wire terminal of the error-correction differential amplifier are respectively borne by the threshold units; therefore, the remaining voltage on a resistor connected in the circuit in series will be a small value, thus effectively reducing the power consumption of the resistor. Furthermore, compared with a normal structure using a resistor alone, the structure connecting a diode or an MOS tube in series in a resistor bypass can greatly reduce the overall area of a chip under the same power consumption, thus reducing cost.
A low-dropout regulator circuit with ultra-low power consumption, comprising an error-correction differential amplifier, an MOS transistor, a first voltage dividing resistor and a second voltage dividing resistor, a negative input end of the error-correction differential amplifier being connected to a bandgap reference voltage, a positive input end of the error-correction differential amplifier being grounded through the second voltage dividing resistor, an output end of the error-correction differential amplifier being connected to a gate of the MOS transistor, a source of the MOS transistor and a power input end of the error-correction differential amplifier being connected to a power input, respectively, a drain of the MOS transistor being connected to the positive input end of the error-correction differential amplifier through the first voltage dividing resistor, characterized in that,
Dependencies are inferred from the claim text.