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公开(公告)号：US12249991B2
公开(公告)日：2025-03-11
申请号：US18345726
申请日：2023-06-30
Applicant: STMicroelectronics France
Inventor： Laurent Jean Garcia , Marc Houdebine
IPC: H03K3/03 , H03K5/1252
Abstract: A clock generator circuit includes an oscillator circuit coupled to a bias circuit. The bias circuit includes a current mirror, third and fourth transistors, and a cascode transistor. The current mirror includes a reference transistor and a set of copy transistors that are programmable. The third transistor has a source connected to a cold spot, a drain and a gate connected to this drain. The fourth transistor has a source connected to the drain of the third transistor, a drain, and a gate connected to that drain. The cascode transistor has a source connected to a drain of at least one of the copy transistors, a drain, and a gate connected to the gate of the fourth transistor. The gates of the fourth transistor and the cascode transistor are thicker than the gates of the reference transistor, each copy transistor, and the third transistor.
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2.发明公开公开(公告)号：US20240232549A9
公开(公告)日：2024-07-11
申请号：US18486373
申请日：2023-10-13
Applicant: STMicroelectronics France
Inventor： Florent Sibille , Marc Houdebine
CPC classification number: G06K7/10297 , H04L7/0331
Abstract: In one embodiment, an object can communicate contactlessly with a reader using active load modulation. The method includes detecting a sensing magnetic field emitted by the reader, initializing a phase-locked loop of the object, detecting a stopping of the sensing magnetic field emitted by the reader before initializing the phase-locked loop of the object is complete, calibrating an oscillator of the phase-locked loop on the basis of an internal clock of the object, detecting a new sensing magnetic field of the reader after calibrating the oscillator, and implementing the phase-locked loop to adjust the phase of the oscillator after detecting a new sensing magnetic field.
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3.发明公开公开(公告)号：US20240135119A1
公开(公告)日：2024-04-25
申请号：US18486373
申请日：2023-10-12
Applicant: STMicroelectronics France
Inventor： Florent Sibille , Marc Houdebine
CPC classification number: G06K7/10297 , H04L7/0331
Abstract: In one embodiment, an object can communicate contactlessly with a reader using active load modulation. The method includes detecting a sensing magnetic field emitted by the reader, initializing a phase-locked loop of the object, detecting a stopping of the sensing magnetic field emitted by the reader before initializing the phase-locked loop of the object is complete, calibrating an oscillator of the phase-locked loop on the basis of an internal clock of the object, detecting a new sensing magnetic field of the reader after calibrating the oscillator, and implementing the phase-locked loop to adjust the phase of the oscillator after detecting a new sensing magnetic field.
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