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    Oscillator circuit resistant to noise and jitter
    3.
    发明授权
    Oscillator circuit resistant to noise and jitter 有权

    公开(公告)号：US11025233B1

    公开(公告)日：2021-06-01

    申请号：US16841915

    申请日：2020-04-07

    Applicant: Samsung Electro-Mechanics Co., Ltd.

    Inventor： Tae Ho Lim

    IPC: H03K3/013 ,  H03K3/011 ,  H03K4/502 ,  H03K3/0231

    Abstract: An oscillator circuit includes a bias circuit, a signal generation circuit, and a control circuit. The bias circuit is configured to generate a reference voltage based on a reference current and a bias resistor. The signal generation circuit is configured to generate a bias current based on the reference current, perform charging and discharging of a capacitor using the bias current, and generate an oscillation signal based on the charging and the discharging of the capacitor. The control circuit is configured to generate a control signal having a constant discharging time, based on the reference voltage and the oscillation signal, controlling the charging and the discharging of the capacitor.

    OSCILLATOR WITH INHERENT COMPARATOR DELAY INFLUENCE ELIMINATED
    7.
    发明申请
    OSCILLATOR WITH INHERENT COMPARATOR DELAY INFLUENCE ELIMINATED 审中-公开

    公开(公告)号：US20170194952A1

    公开(公告)日：2017-07-06

    申请号：US15387624

    申请日：2016-12-21

    Applicant: Chengdu Monolithic Power Systems Co., Ltd.

    Inventor： Li Xu

    IPC: H03K4/502 ,  H02M3/04 ,  H02M1/08 ,  H03B5/04

    CPC classification number: H03K4/502 ,  H02M1/08 ,  H03B5/04 ,  H03B5/24 ,  H03K3/0231

    Abstract: An oscillator includes: a current source; a capacitor coupled between the current source and a reference ground; a first switch coupled to the capacitor in parallel; an error amplifier coupled to the capacitor and configured to generate a regulation voltage based on a reference voltage and the voltage across the capacitor; a comparator configured to compare the voltage across the capacitor with the regulation voltage and generate a comparison signal; and a one-shot circuit coupled to the comparator, wherein based on the comparison signal, the one-shot circuit generates a trigger signal to control the first switch.

    Triangular wave generating circuit to provide clock synchronization
    9.
    发明授权
    Triangular wave generating circuit to provide clock synchronization 有权
    三角波发生电路提供时钟同步

    公开(公告)号：US09300281B2

    公开(公告)日：2016-03-29

    申请号：US14156264

    申请日：2014-01-15

    Applicant: Elite Semiconductor Memory Technology Inc.

    Inventor： Szu-chun Tsao

    IPC: H03K4/06 ,  H03K4/50 ,  H03K5/01 ,  H03K4/502

    CPC classification number: H03K4/50 ,  H03K4/502 ,  H03K5/01

    Abstract: A triangular wave generating circuit incorporates a capacitor, first, second, third, and fourth constant current sources, first and second switching units, a high/low level limiter, a clock generator, and a phase detecting unit. The first and second constant current sources charge the capacitor and the third and fourth constant current sources discharge the capacitor. The phase detecting unit compares an externally supplied clock signal with an internal clock signal and generates first and second phase signals base on a phase difference between the externally supplied clock signal and the internal clock signal. The second switching unit comprises a third switch and a fourth switch. The third switch couples the second constant current source to the capacitor in response to the first phase signal. The fourth switch couples the fourth constant current source to the capacitor in response to the second phase signal.

    Abstract translation: 三角波产生电路包括电容器，第一，第二，第三和第四恒定电流源，第一和第二开关单元，高/低电平限制器，时钟发生器和相位检测单元。 第一和第二恒流源为电容器充电，第三和第四恒流源对电容器放电。 相位检测单元将外部提供的时钟信号与内部时钟信号进行比较，并且基于外部提供的时钟信号和内部时钟信号之间的相位差产生第一和第二相位信号。 第二开关单元包括第三开关和第四开关。 第三开关响应于第一相位信号将第二恒定电流源耦合到电容器。 第四开关响应于第二相位信号将第四恒流源耦合到电容器。

    Low current single chip oscillator timing circuit
    10.
    发明授权
    Low current single chip oscillator timing circuit 有权
    低电流单片振荡器定时电路

    公开(公告)号：US08928420B2

    公开(公告)日：2015-01-06

    申请号：US13589097

    申请日：2012-08-18

    Applicant: Dan Raphaeli

    Inventor： Dan Raphaeli

    IPC: H03K4/502 ,  H03K3/033

    CPC classification number: H03K4/502 ,  H03K3/0231 ,  H03K3/033 ,  H03L7/02

    Abstract: A low current single chip oscillator timing circuit which includes a dual mode capacitor circuit having a larger capacitance mode and a smaller capacitance mode having a fixed ratio. The timing circuit also includes an oscillator circuit that uses the dual mode capacitor circuit as a part of its time base wherein the large capacitance mode is operated with low power consumption and as needed includes a circuit that generates a reference pulse, wherein the short pulse and the reference pulse are compared and the result is used for correction to the oscillator frequency to create a feedback loop.

    Abstract translation: 一种低电流单片振荡器定时电路，其包括具有较大电容模式的双模式电容器电路和具有固定比率的较小电容模式。 定时电路还包括使用双模电容器电路作为其时基的一部分的振荡器电路，其中大电容模式以低功耗工作，并且根据需要包括产生参考脉冲的电路，其中短脉冲和 比较参考脉冲，并将结果用于校正振荡器频率以产生反馈回路。

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