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公开(公告)号：US20180239384A1
公开(公告)日：2018-08-23
申请号：US15693214
申请日：2017-08-31
Inventor： Serge Ramet , Sandrine Nicolas , Danika Perrin , Cedric Rechatin
CPC classification number: G05F3/262 , G05F1/46 , H03F3/16 , H03F3/195 , H03F2200/294
Abstract: An integrated circuit includes a first stage configured to receive a bias current. A current regulation loop includes a transimpedance amplifier having a first transistor, and a second transistor having a gate coupled to a gate of the first transistor. The first transistor and the second transistor are configured to compare the bias current with a reference current, and to generate a regulation voltage on an output node of the transimpedance amplifier. A capacitor is coupled between the output node of the transimpedance amplifier and the gates of the first and second transistors.
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公开(公告)号：US10447145B1
公开(公告)日：2019-10-15
申请号：US16195448
申请日：2018-11-19
Applicant: STMicroelectronics (Grenoble 2) SAS
Inventor： Danika Perrin , Valerie Carrat , Marc Sabut
Abstract: In an embodiment, a method for soft-starting an SMPS includes: asserting an enable signal; disabling an output stage of the SMPS; after asserting the enable signal, measuring a feedback voltage of the SMPS; receiving a first reference voltage at an input reference node; comparing the measured feedback voltage with the first reference voltage; and, when the measured feedback voltage is lower than the first reference voltage, storing the feedback voltage in a soft-start capacitor, connecting an output reference node to the soft-start capacitor, enabling the output stage of the SMPS, and switching a transistor of the output stage to regulate the output voltage based on the feedback voltage and a second reference voltage at the output reference node, and injecting a current into the soft-start capacitor.
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Patent Agency Ranking
公开(公告)号：US20230056937A1
公开(公告)日：2023-02-23
申请号：US17881749
申请日：2022-08-05
Inventor： Danika Perrin , Sandrine Nicolas
IPC: H04B1/16
Abstract: In an embodiment an envelope detection device includes an input terminal configured to receive an amplitude-modulated radio frequency signal, a first resistive element and a first MOS transistor connected in parallel between the input terminal and a first node configured to receive a reference potential, a first capacitive element connected between a gate of the first MOS transistor and the first node, an envelope detection circuit connected to the input terminal and configured to supply a voltage representative of an envelope of the amplitude-modulated signal and a circuit for controlling the first MOS transistor configured to supply a first current to the gate of the first MOS transistor only when the voltage is smaller than a first threshold and draw a second current from the gate of the first MOS transistor only when the voltage is higher than a second threshold, the second threshold being higher than the first threshold.
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公开(公告)号：US20250055492A1
公开(公告)日：2025-02-13
申请号：US18929262
申请日：2024-10-28
Inventor： Danika Perrin , Sandrine Nicolas
IPC: H04B1/16
Abstract: In an embodiment an envelope detection device includes an input terminal configured to receive an amplitude-modulated radio frequency signal, a first resistive element and a first MOS transistor connected in parallel between the input terminal and a first node configured to receive a reference potential, a first capacitive element connected between a gate of the first MOS transistor and the first node, an envelope detection circuit connected to the input terminal and configured to supply a voltage representative of an envelope of the amplitude-modulated signal and a circuit for controlling the first MOS transistor configured to supply a first current to the gate of the first MOS transistor only when the voltage is smaller than a first threshold and draw a second current from the gate of the first MOS transistor only when the voltage is higher than a second threshold, the second threshold being higher than the first threshold.
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公开(公告)号：US10359800B2
公开(公告)日：2019-07-23
申请号：US15693214
申请日：2017-08-31
Inventor： Serge Ramet , Sandrine Nicolas , Danika Perrin , Cedric Rechatin
Abstract: An integrated circuit includes a first stage configured to receive a bias current. A current regulation loop includes a transimpedance amplifier having a first transistor, and a second transistor having a gate coupled to a gate of the first transistor. The first transistor and the second transistor are configured to compare the bias current with a reference current, and to generate a regulation voltage on an output node of the transimpedance amplifier. A capacitor is coupled between the output node of the transimpedance amplifier and the gates of the first and second transistors.
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公开(公告)号：US12155406B2
公开(公告)日：2024-11-26
申请号：US17881749
申请日：2022-08-05
Inventor： Danika Perrin , Sandrine Nicolas
Abstract: In an embodiment an envelope detection device includes an input terminal configured to receive an amplitude-modulated radio frequency signal, a first resistive element and a first MOS transistor connected in parallel between the input terminal and a first node configured to receive a reference potential, a first capacitive element connected between a gate of the first MOS transistor and the first node, an envelope detection circuit connected to the input terminal and configured to supply a voltage representative of an envelope of the amplitude-modulated signal and a circuit for controlling the first MOS transistor configured to supply a first current to the gate of the first MOS transistor only when the voltage is smaller than a first threshold and draw a second current from the gate of the first MOS transistor only when the voltage is higher than a second threshold, the second threshold being higher than the first threshold.
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公开(公告)号：US20230129973A1
公开(公告)日：2023-04-27
申请号：US17939173
申请日：2022-09-07
Inventor： Reiner Welk , Danika Perrin
Abstract: In an embodiment, a radio frequency (RF) receiver circuit includes a main circuit and a wake-up circuit. The main circuit is configured to process RF signals. The wake-up circuit is configured to detect a reception of the RF signals. The wake-up circuit includes an automatic gain control (AGC) loop, and is configured to have a first operating mode where a set point voltage of the loop has a first substantially constant value, and a second operating mode where the set point voltage of the loop has a second value dependent on a power supply voltage of the wake-up circuit.
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