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    • 2. 发明授权
    • PLL with stable phase discriminator
    • PLL具有稳定的鉴相器
    • US5436596A
    • 1995-07-25
    • US153384
    • 1993-11-16
    • Lambert J. H. Folmer
    • Lambert J. H. Folmer
    • H03L7/085H03D13/00H03L7/089H03L7/093H03L7/00
    • H03L7/0891H03D13/004
    • A phase-locked-loop (PLL) with stable phase discrimination includes a charge pump with a current source and current sink to control a VCO, and a phase discriminator to compare the VCO's signal to a stable reference signal for controlling the charge pump. The phase discriminator includes a resettable D-flipflop to provide the current source control signal and a resettable D-flipflop to provide the current sink control signal. The reset signal keeps both sink and source temporarily alive to avoid a dead zone region. The reset signal is produced under the combined control of the sink and source control signals and, in addition, of the reference signal to enhance stability.
    • 具有稳定相位鉴别的锁相环(PLL)包括具有用于控制VCO的电流源和电流吸收器的电荷泵,以及用于将VCO信号与用于控制电荷泵的稳定参考信号进行比较的鉴相器。 相位鉴别器包括一个可复位的D触发器,用于提供电流源控制信号和一个可复位的D触发器来提供电流吸收控制信号。 复位信号使接收器和源极保持暂时活动,以避免死区区域。 在信宿和源极控制信号的组合控制下产生复位信号,另外还产生参考信号以增强稳定性。
    • 3. 发明授权
    • Digital windowing current-mode controller for a DC-DC converter
    • 用于DC-DC转换器的数字窗口电流模式控制器
    • US08988055B2
    • 2015-03-24
    • US11573352
    • 2005-07-27
    • Henricus C. J. ButhkerLambert J. H. FolmerCornelis Stienstra
    • Henricus C. J. ButhkerLambert J. H. FolmerCornelis Stienstra
    • H02M3/157H02M3/156
    • H02M3/156
    • A current-mode controlled power converter (1) comprises a controllable switch (S3) which is coupled to an inductor (L1) to obtain a periodical current (I1) through the inductor (L1). A current feedback loop (2, 3, 4, 5) generates a current-error signal (CE) which is a difference between a set current level (SC) and a level of a sensed current (SE) in the power converter (1). A driver (9) for switches off the controllable switch (S3) when the current error signal (CE) indicates that the level of the sensed current (SE) has reached the set current level (SC). A voltage feedback loop (10, 3, 7, 8, 5) influences the set current level (SC) in response to a level of an output voltage (Vout) of the power converter (1). The voltage feedback loop (10, 3, 7, 8, 5) comprises: a window circuit (10) to detect whether the output voltage (Vout) is (i) within a first window (WS) around a nominal value (Vr), (ii) outside the first window (WS) but within a second window (WL), larger than the first window (WS), (iii) outside the second window (WL). A controller (3) is coupled to the window circuit (10) to determine an adaptation of the set current level (SC), wherein the adaptation is larger when the output voltage (Vout) detected is outside the second window (WL) than when the output voltage (Vout) detected is within the second window (WL) but outside the first window (WS).
    • 电流模式控制功率转换器(1)包括可控开关(S3),其连接到电感器(L1)以获得通过电感器(L1)的周期性电流(I1)。 电流反馈回路(2,3,4,5)产生电流误差信号(CE),其是功率转换器(1)中的设定电流电平(SC)和感测电流(SE)的电平之差 )。 当电流误差信号(CE)指示感测电流(SE)的电平达到设定电流电平(SC)时,用于关断可控开关(S3)的驱动器(9)。 响应于功率转换器(1)的输出电压(Vout)的电平,电压反馈回路(10,3,7,8,5)影响设定电流电平(SC)。 电压反馈回路(10,3,7,8,5)包括:窗口电路(10),用于检测在围绕标称值(Vr)的第一窗口(WS)内的输出电压(Vout)是否为(i) ,(ii)在第一窗口(WS)之外但在第二窗口(WL)内,大于第一窗口(WS),(iii)在第二窗口(WL)之外。 控制器(3)耦合到窗口电路(10)以确定设定电流电平(SC)的适配,其中当检测到的输出电压(Vout)在第二窗口(WL)之外时,自适应大于当 检测到的输出电压(Vout)在第二窗口(WL)内,但在第一窗口(WS)之外。