US 12,143,009 B2
Control system for UHF RFID passive tags
Alessandro Venca, Hauterive (CH)
Assigned to EM Microelectronic-Marin SA, Marin (CH)
Appl. No. 17/774,384
Filed by EM Microelectronic-Marin SA, Marin (CH)
PCT Filed Dec. 16, 2020, PCT No. PCT/EP2020/086556
§ 371(c)(1), (2) Date May 4, 2022,
PCT Pub. No. WO2021/089885, PCT Pub. Date May 14, 2021.
Claims priority of application No. 20154405 (EP), filed on Jan. 29, 2020; and application No. PCT/EP2020/081170 (WO), filed on Nov. 5, 2020.
Prior Publication US 2022/0406397 A1, Dec. 22, 2022
Int. Cl. H02M 3/07 (2006.01); G06K 19/07 (2006.01); G11C 5/14 (2006.01); G11C 29/02 (2006.01); G11C 29/50 (2006.01); H02M 1/00 (2006.01)
CPC H02M 3/07 (2013.01) [G06K 19/0713 (2013.01); G11C 5/145 (2013.01); G11C 29/028 (2013.01); G11C 29/50008 (2013.01); H02M 1/0012 (2021.05); H02M 1/0025 (2021.05); H02M 3/073 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A power control unit configured to monitor an output power of a charge pump converter having an input impedance between a second primary signal input and a second secondary signal input, and having a primary signal output, a secondary signal output, and an input impedance controlling terminal configured to be plugged to said power control unit, said input impedance controlling terminal being configured to modify said input impedance, said power control unit comprising:
a control circuit configured to sense said output power of said charge pump converter through said primary signal output and said secondary signal output, and transmit a sensed power value as a function of the sensed output power; and
a control unit configured to receive said sensed power value, establish a control value, and send said control value to said impedance controlling terminal so as to modify said input impedance,
wherein the control circuit is further configured to control an output current from the charge pump converter and measure an output voltage between the primary signal output and said secondary signal output at lower input power levels across the second primary signal input and the second secondary signal input, and/or control the output voltage and measure the output current at higher input power levels, the control circuit further comprising a power input terminal configured to sense the output current and/or the output voltage value of the charge pump converter, a resistive divider connected to the power input terminal to be compared in a comparison circuit to an internal reference configured to set a reference value, and a current limited buffer at the output of the control circuit linked to the control unit.