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    Low-power temperature-insensitive current bias circuit
    1.
    发明授权
    Low-power temperature-insensitive current bias circuit 有权

    公开(公告)号：US10185337B1

    公开(公告)日：2019-01-22

    申请号：US15945568

    申请日：2018-04-04

    Applicant: QUALCOMM Incorporated

    Inventor： Sungmin Ock ,  Wenjing Yin ,  Xuhao Huang

    IPC: G05F1/46 ,  H03K17/687

    Abstract: A bias current circuit is provided with a bias circuit that generates a bias voltage to control the resistance of an active resistor transistor. The bias circuit is configured to generate the bias voltage to be greater than one-half of a power supply voltage for the current bias circuit and to have a negative temperature dependency to reduce the temperature sensitivity of the bias current circuit.

    Voltage droop mitigation circuit for power supply network
    2.
    发明授权
    Voltage droop mitigation circuit for power supply network 有权

    公开(公告)号：US10013010B1

    公开(公告)日：2018-07-03

    申请号：US15398825

    申请日：2017-01-05

    Applicant: QUALCOMM Incorporated

    Inventor： Sungmin Ock ,  Xuhao Huang

    IPC: G05F1/575

    Abstract: A voltage droop reduction circuit generally including a loop coupled to an output of a voltage regulator is provided. The loop includes a first current amplifier. The voltage droop reduction circuit may also include a first capacitor coupled between the output of the voltage regulator and an input of the first current amplifier.

    High gain low power phase detector and loop filter for phase lock loop (PLL)
    3.
    发明授权
    High gain low power phase detector and loop filter for phase lock loop (PLL) 有权

    公开(公告)号：US12015415B1

    公开(公告)日：2024-06-18

    申请号：US18086565

    申请日：2022-12-21

    Applicant: QUALCOMM Incorporated

    Inventor： Sungmin Ock ,  Marzio Pedrali-Noy

    IPC: H03L7/093 ,  H03L7/099

    CPC classification number: H03L7/093 ,  H03L7/0992

    Abstract: An apparatus including: a phase lock loop (PLL), including: a phase detector and loop pass filter (PD/LF), including: a phase/frequency detector including a first input configured to receive a reference signal, and a second input configured to receive a feedback signal, and an output configured to produce an output signal based on the reference and feedback signals; a first capacitor; and a charge pump, including: a charging path configured to generate a charging current to charge the first capacitor based on the output signal; and a discharging path including a first resistor configured to discharge the first capacitor.

    Temperature-compensated low-pass filter
    4.
    发明授权
    Temperature-compensated low-pass filter 有权

    公开(公告)号：US11616505B1

    公开(公告)日：2023-03-28

    申请号：US17674666

    申请日：2022-02-17

    Applicant: QUALCOMM Incorporated

    Inventor： Sungmin Ock ,  Chenling Huang

    IPC: H03K17/14 ,  H03K17/16 ,  H03H11/04 ,  H04M1/02 ,  H03K3/03 ,  H03F3/45

    Abstract: A temperature-compensated low-pass filter includes a differential amplifier that controls a first transistor to pass a subthreshold current through the transistor to charge a capacitor with low-pass-filtered output voltage. A second transistor has a first terminal coupled to an input terminal of the low-pass filter and has a second terminal coupled to a current source conducting a bias current. The differential amplifier also controls the second transistor to conduct the bias current responsive to a difference between a complementary-to-absolute-temperature reference voltage and a voltage of the second terminal of the second transistor.

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