Digital Voltage Ramp Generator
    2.
    发明申请
    Digital Voltage Ramp Generator 审中-公开
    数字电压斜坡发生器

    公开(公告)号:US20150116012A1

    公开(公告)日:2015-04-30

    申请号:US14066961

    申请日:2013-10-30

    IPC分类号: H03K4/12

    CPC分类号: H03K4/12 H03K4/48 H03K4/502

    摘要: According to some embodiments, an all digital ramp generator may use a string of series connected delays or digital to time-based circuits to perform voltage ramp generation. Thus in some embodiments conventional operational amplifier circuits and relaxation oscillators may be replaced for generating triangular ramp waveforms for DC to DC or direct time-based DC to DC converters. The use of delay lines may produce sufficient resolution for many applications. Thus time domain techniques may afford a more digital approach that scales with process technology and allows high speed operation in some embodiments. A design based on use of inverters and capacitors may scale well with process technology. The decoder and drive logic may be integrated into the voltage ramp generation in some embodiments.

    摘要翻译: 根据一些实施例,全数字斜坡发生器可以使用串联连接的延迟串或数字到基于时间的电路来执行电压斜坡生成。 因此,在一些实施例中,常规运算放大器电路和弛豫振荡器可以被替换以产生用于直流到直流或直接基于时间的直流到直流转换器的三角形斜坡波形。 使用延迟线可以为许多应用产生足够的分辨率。 因此,时域技术可以提供与数字处理技术相比较的数字化方法,并且在一些实施例中允许高速操作。 基于逆变器和电容器的设计可以与工艺技术相结合。 在一些实施例中,解码器和驱动逻辑可以集成到电压斜坡生成中。

    VDD-independent oscillator insensitive to process variation
    3.
    发明授权
    VDD-independent oscillator insensitive to process variation 有权
    与VDD无关的振荡器对工艺变化不敏感

    公开(公告)号:US08531248B2

    公开(公告)日:2013-09-10

    申请号:US12617009

    申请日:2009-11-12

    申请人: Yi-Tzu Chen

    发明人: Yi-Tzu Chen

    IPC分类号: H03K3/26 H03K3/02

    摘要: An oscillator includes a positive power supply node for providing a positive power supply voltage; a capacitor; and a constant current source providing a first constant current and coupled to the positive power supply node. The first constant current is independent from the positive power supply node. The oscillator also includes a charging current source configured to provide a second constant current to charge the capacitor, wherein the second constant current mirrors the first constant current. The oscillator further includes a constant current source inverter having a third constant current mirroring the first constant current. The constant current source inverter is configured to control the oscillator to transition state at a constant state transition voltage.

    摘要翻译: 振荡器包括用于提供正电源电压的正电源节点; 电容器 以及恒定电流源,提供第一恒定电流并耦合到正电源节点。 第一恒定电流与正电源节点无关。 振荡器还包括被配置为提供第二恒定电流以对电容器充电的充电电流源,其中第二恒定电流反映第一恒定电流。 所述振荡器还包括具有与第一恒定电流成反比的第三恒定电流的恒流源反相器。 恒流源逆变器被配置为在恒定状态转变电压下控制振荡器转变状态。