Tunable ring oscillator
    2.
    发明申请
    Tunable ring oscillator 有权
    可调环形振荡器

    公开(公告)号:US20060091967A1

    公开(公告)日:2006-05-04

    申请号:US10981048

    申请日:2004-11-04

    IPC分类号: H03K3/03

    CPC分类号: H03K3/0315 H03K17/04106

    摘要: A tunable ring oscillator, in accordance with the teachings described herein, may include one or more delay circuits having a coarse tuning circuitry and a fine tuning circuitry. The coarse tuning circuitry may be used to set one of a minimum time delay or a maximum time delay as a function of a coarse tuning input. The fine tuning circuitry may be used to adjust between the minimum time delay and the maximum time delay as a function of a fine tuning input.

    摘要翻译: 根据本文所述的教导,可调环形振荡器可以包括具有粗调谐电路和微调电路的一个或多个延迟电路。 粗调谐电路可以用于将最小时间延迟或最大时间延迟中的一个设置为粗调输入的函数。 微调电路可以用于根据微调输入在最小时间延迟和最大时间延迟之间进行调整。

    Extendable N-channel digital pulse-width/pulse-frequency modulator
    3.
    发明授权
    Extendable N-channel digital pulse-width/pulse-frequency modulator 有权
    可扩展的N通道数字脉冲宽度/脉冲频率调制器

    公开(公告)号:US08125287B2

    公开(公告)日:2012-02-28

    申请号:US12707895

    申请日:2010-02-18

    IPC分类号: H03K7/08 H03K7/06 H03K3/017

    CPC分类号: H03K7/08 H03K7/06

    摘要: A multichannel digital pulse width modulator/digital pulse frequency modulator uses a single ring oscillator that is shared by multiple channels. The ring oscillator has taps that can be used for least significant bit (LSB) precision of the generated PWM signal. The ring oscillator also produces a ring clock that is used to synchronize logic in the channels. Since the logic in the channels are synchronized by the ring clock, the channels can each independently produce different frequency PWM (or PFM) signals and still share the same ring oscillator.

    摘要翻译: 多通道数字脉宽调制器/数字脉冲频率调制器使用由多个通道共享的单个环形振荡器。 环形振荡器具有可用于产生的PWM信号的最低有效位(LSB)精度的抽头。 环形振荡器还产生一个环形时钟,用于同步通道中的逻辑。 由于通道中的逻辑通过环形时钟同步,通道可以各自独立地产生不同频率的PWM(或PFM)信号,并且仍然共享相同的环形振荡器。

    Multi-channel digital pulse width modulator (DPWM)
    4.
    发明授权
    Multi-channel digital pulse width modulator (DPWM) 有权
    多通道数字脉宽调制器(DPWM)

    公开(公告)号:US07915938B2

    公开(公告)日:2011-03-29

    申请号:US12608186

    申请日:2009-10-29

    摘要: A multiple channel Digital Pulse Width Modulator (DPWM) can include a single delay locked loop with a delay line, the delay line producing a number of outputs. Circuitry can use a delay line mask to mask a portion of the delay line outputs to produce a modified outputs so as to prevent premature pulse width reset. Jitter tolerance look ahead circuits can prevent jitter from causing premature reset of pulse width modulated signals. The pulse width modulators can include multiple alternately used multiplexers so that the operation of the pulse width modulators is not affected by the load time of the multiplexers.

    摘要翻译: 多通道数字脉宽调制器(DPWM)可以包括具有延迟线的单个延迟锁定环,延迟线产生多个输出。 电路可以使用延迟线掩模来屏蔽延迟线输出的一部分以产生修改的输出,以防止过早的脉冲宽度复位。 抖动容限预测电路可以防止抖动引起脉宽调制信号的过早复位。 脉冲宽度调制器可以包括多个交替使用的多路复用器,使得脉冲宽度调制器的操作不受复用器的加载时间的影响。

    EXTENDABLE N-CHANNEL DIGITAL PULSE-WIDTH/PULSE-FREQUENCY MODULATOR
    5.
    发明申请
    EXTENDABLE N-CHANNEL DIGITAL PULSE-WIDTH/PULSE-FREQUENCY MODULATOR 有权
    可扩展的N沟道数字脉冲宽度/脉冲频率调制器

    公开(公告)号:US20110199164A1

    公开(公告)日:2011-08-18

    申请号:US12707895

    申请日:2010-02-18

    IPC分类号: H03K7/08

    CPC分类号: H03K7/08 H03K7/06

    摘要: A multichannel digital pulse width modulator/digital pulse frequency modulator uses a single ring oscillator that is shared by multiple channels. The ring oscillator has taps that can be used for least significant bit (LSB) precision of the generated PWM signal. The ring oscillator also produces a ring clock that is used to synchronize logic in the channels. Since the logic in the channels are synchronized by the ring clock, the channels can each independently produce different frequency PWM (or PFM) signals and still share the same ring oscillator.

    摘要翻译: 多通道数字脉宽调制器/数字脉冲频率调制器使用由多个通道共享的单个环形振荡器。 环形振荡器具有可用于产生的PWM信号的最低有效位(LSB)精度的抽头。 环形振荡器还产生一个环形时钟,用于同步通道中的逻辑。 由于通道中的逻辑通过环形时钟同步,通道可以各自独立地产生不同频率的PWM(或PFM)信号,并且仍然共享相同的环形振荡器。

    Tunable ring oscillator
    6.
    发明授权
    Tunable ring oscillator 有权
    可调环形振荡器

    公开(公告)号:US07180378B2

    公开(公告)日:2007-02-20

    申请号:US10981048

    申请日:2004-11-04

    IPC分类号: H03K3/03 H03L7/00

    CPC分类号: H03K3/0315 H03K17/04106

    摘要: A tunable ring oscillator, in accordance with the teachings described herein, may include one or more delay circuits having a coarse tuning circuitry and a fine tuning circuitry. The coarse tuning circuitry may be used to set one of a minimum time delay or a maximum time delay as a function of a coarse tuning input. The fine tuning circuitry may be used to adjust between the minimum time delay and the maximum time delay as a function of a fine tuning input.

    摘要翻译: 根据本文所述的教导,可调环形振荡器可以包括具有粗调谐电路和微调电路的一个或多个延迟电路。 粗调谐电路可以用于将最小时间延迟或最大时间延迟中的一个设置为粗调输入的函数。 微调电路可以用于根据微调输入在最小时间延迟和最大时间延迟之间进行调整。

    MULTI-CHANNEL DIGITAL PULSE WIDTH MODULATOR (DPWM)
    7.
    发明申请
    MULTI-CHANNEL DIGITAL PULSE WIDTH MODULATOR (DPWM) 有权
    多通道数字脉宽调制器(DPWM)

    公开(公告)号:US20100117752A1

    公开(公告)日:2010-05-13

    申请号:US12608186

    申请日:2009-10-29

    IPC分类号: H03K7/08

    摘要: A multiple channel Digital Pulse Width Modulator (DPWM) can include a single delay locked loop with a delay line, the delay line producing a number of outputs. Circuitry can use a delay line mask to mask a portion of the delay line outputs to produce a modified outputs so as to prevent premature pulse width reset. Jitter tolerance look ahead circuits can prevent jitter from causing premature reset of pulse width modulated signals. The pulse width modulators can include multiple alternately used multiplexers so that the operation of the pulse width modulators is not affected by the load time of the multiplexers.

    摘要翻译: 多通道数字脉宽调制器(DPWM)可以包括具有延迟线的单个延迟锁定环,延迟线产生多个输出。 电路可以使用延迟线掩模来屏蔽延迟线输出的一部分以产生修改的输出,以防止过早的脉冲宽度复位。 抖动容限预测电路可以防止抖动引起脉宽调制信号的过早复位。 脉冲宽度调制器可以包括多个交替使用的多路复用器,使得脉冲宽度调制器的操作不受复用器的加载时间的影响。

    Robust locking/tuning in a multi-rate, multi-range phase locked loop
    8.
    发明申请
    Robust locking/tuning in a multi-rate, multi-range phase locked loop 审中-公开
    在多速率,多范围锁相环路中可靠地锁定/调谐

    公开(公告)号:US20070205835A1

    公开(公告)日:2007-09-06

    申请号:US11649096

    申请日:2007-01-03

    IPC分类号: H03L7/00

    摘要: Systems and methods for tuning a phase locked loop (PLL) having a segmented voltage controlled oscillator (VCO) to an input frequency are provided. The PLL is reset and its VCO is coarse tuned until the input frequency is within a first predetermined threshold of the VCO center frequency. The input frequency is then compared to a clock reference signal to determine whether the input frequency has stabilized. After the input frequency has stabilized, the input frequency is continuously monitored by comparing it to the clock reference signal to determine whether the input frequency is varying, and if the input frequency is varying by more than a second predetermined threshold, then the PLL is reset.

    摘要翻译: 提供了将具有分段压控振荡器(VCO)的锁相环(PLL)调谐到输入频率的系统和方法。 PLL被复位,并且其VCO被粗调,直到输入频率在VCO中心频率的第一预定阈值内。 然后将输入频率与时钟参考信号进行比较,以确定输入频率是否稳定。 在输入频率稳定后,通过将输入频率与时钟参考信号进行比较来连续监视输入频率,以确定输入频率是否变化,如果输入频率变化超过第二预定阈值,则PLL被复位 。