US 12,072,755 B2
Optimized low power mode for NFC/RFID systems
Denis Roman, Villeneuve-Loubet (FR); Jean-Louis Demessine, Saint-Jeannet (FR); Lionel Chastillon, Valbonne (FR); and Renaud Lemonnier, Antibes (FR)
Assigned to STMicroelectronics (Rousset) SAS, Rousset (FR)
Filed by STMicroelectronics (Rousset) SAS, Rousset (FR)
Filed on Sep. 23, 2022, as Appl. No. 17/951,631.
Claims priority of application No. 2111452 (FR), filed on Oct. 28, 2021.
Prior Publication US 2023/0133688 A1, May 4, 2023
Int. Cl. G06F 1/32 (2019.01); G06F 1/3296 (2019.01); H04B 5/77 (2024.01)
CPC G06F 1/3296 (2013.01) [H04B 5/77 (2024.01)] 20 Claims
OG exemplary drawing
 
1. An electronic device, comprising:
a control unit;
a power supply circuit configured to generate a first supply voltage;
an antenna configured to:
receive a radio frequency signal when the control unit is in an OFF state, and
transmit a first voltage to the control unit to power the control unit by a second supply voltage for a duration of a booting sequence of the control unit, the first voltage being a representative of the radio frequency signal; and
a conversion circuit coupled to the antenna and the control unit, the conversion circuit comprising:
a voltage rectifying diode bridge configured to convert the first voltage from AC to DC, the voltage rectifying diode bridge having a first output terminal and a second output terminal, wherein the second supply voltage equals a potential difference between the first output terminal and the second output terminal, a potential at the second output terminal being at a first reference potential,
a first diode having an anode terminal coupled to the first output terminal, a cathode terminal of the first diode coupled to the second output terminal, and
a capacitor having a first terminal coupled to the first output terminal, a second terminal of the capacitor coupled to the second output terminal.