公开(公告)号：US20070236188A1

公开(公告)日：2007-10-11

申请号：US11695876

申请日：2007-04-03

申请人： Neil Gibson ,  Kevin Scoones ,  Erich Bayer

发明人： Neil Gibson ,  Kevin Scoones ,  Erich Bayer

IPC分类号： G05F1/613

CPC分类号： H02M3/1563

摘要： A self-oscillating DC-DC buck converter with zero hysteresis is described. The converter comprises a comparator with a supply input, a non-inverting input to which a reference voltage is applied, an inverting input to which a feedback signal is applied, and an output to which a filter network is connected. The feedback signal is derived from the filter network and the output voltage of the converter is determined by the reference voltage. Connecting a filter network with an inductor and a capacitor to the output of the comparator and deriving the feedback signal from the filter network, results in an output of the comparator which is a DC output with a superimposed ripple. The level of the DC output is controlled by the reference voltage applied to the non-inverting input of the comparator, and the inductor current develops the ripple in the equivalent series resistance of the load circuit connected to the comparator output. The ripple can be regarded as the ramp signal in a conventional DC-DC converter. Accordingly, the output voltage is regulated to follow the reference voltage, and the proposed topology is equivalent to a DC-DC buck converter.

摘要翻译： 描述了具有零滞后的自谐振DC-DC降压转换器。 该转换器包括具有电源输入的比较器，施加参考电压的非反相输入端，施加反馈信号的反相输入端和连接有滤波器网络的输出端。 反馈信号来自滤波器网络，转换器的输出电压由参考电压决定。 将滤波器网络与电感器和电容器连接到比较器的输出端，并从滤波器网络导出反馈信号，从而产生比较器的输出，该输出是具有叠加纹波的直流输出。 直流输出的电平由施加到比较器的非反相输入的参考电压控制，电感电流产生与比较器输出相连的负载电路的等效串联电阻的纹波。 在常规DC-DC转换器中，纹波可以被看作是斜坡信号。 因此，输出电压被调节为跟随参考电压，并且所提出的拓扑等效于DC-DC降压转换器。

公开(公告)号：US07902805B2

公开(公告)日：2011-03-08

申请号：US11695876

申请日：2007-04-03

申请人： Neil Gibson ,  Kevin Scoones ,  Erich Bayer

发明人： Neil Gibson ,  Kevin Scoones ,  Erich Bayer

IPC分类号： G05F1/575

CPC分类号： H02M3/1563

摘要： A self-oscillating DC-DC buck converter with zero hysteresis is described. The converter comprises a comparator with a supply input, a non-inverting input to which a reference voltage is applied, an inverting input to which a feedback signal is applied, and an output to which a filter network is connected. The feedback signal is derived from the filter network and the output voltage of the converter is determined by the reference voltage. Connecting a filter network with an inductor and a capacitor to the output of the comparator and deriving the feedback signal from the filter network, results in an output of the comparator which is a DC output with a superimposed ripple. The level of the DC output is controlled by the reference voltage applied to the non-inverting input of the comparator, and the inductor current develops the ripple in the equivalent series resistance of the load circuit connected to the comparator output. The ripple can be regarded as the ramp signal in a conventional DC-DC converter. Accordingly, the output voltage is regulated to follow the reference voltage, and the proposed topology is equivalent to a DC-DC buck converter.

摘要翻译： 描述了具有零滞后的自谐振DC-DC降压转换器。 该转换器包括具有电源输入的比较器，施加参考电压的非反相输入端，施加反馈信号的反相输入端和连接有滤波器网络的输出端。 反馈信号来自滤波器网络，转换器的输出电压由参考电压决定。 将滤波器网络与电感器和电容器连接到比较器的输出端，并从滤波器网络导出反馈信号，从而产生比较器的输出，该输出是具有叠加纹波的直流输出。 直流输出的电平由施加到比较器的非反相输入的参考电压控制，电感电流产生与比较器输出相连的负载电路的等效串联电阻的纹波。 在常规DC-DC转换器中，纹波可以被看作是斜坡信号。 因此，输出电压被调节为跟随参考电压，并且所提出的拓扑等价于DC-DC降压转换器。

公开(公告)号：US08970199B2

公开(公告)日：2015-03-03

申请号：US12792919

申请日：2010-06-03

申请人： Kevin Scoones ,  Gerhard Thiele ,  Neil Gibson

发明人： Kevin Scoones ,  Gerhard Thiele ,  Neil Gibson

IPC分类号： H02M3/157 ,  H02M1/32 ,  H02M3/158 ,  H02M1/00

CPC分类号： H02M3/157 ,  H02M1/32 ,  H02M3/1588 ,  H02M2001/0032 ,  Y02B70/1466

摘要： The invention relates to an electronic device and a method for DC-DC conversion using a comparator for generating an output signal for driving a power switch of a switch mode DC-DC converter. The electronic device is configured to reduce a bias current of the comparator with a first slope in response to a decreasing load and to increase the bias current of the comparator with a second slope in response to an increasing load, wherein the second slope is steeper than the first slope.

摘要翻译： 本发明涉及使用比较器产生用于驱动开关模式DC-DC转换器的电源开关的输出信号的DC-DC转换的电子装置和方法。 电子设备被配置为响应于负载的减小而以比第一斜率减小比较器的偏置电流，并且响应于增加的负载而以比第二斜率增加比较器的偏置电流，其中第二斜率比 第一个斜坡

公开(公告)号：US08148963B2

公开(公告)日：2012-04-03

申请号：US12190730

申请日：2008-08-13

申请人： Neil Gibson ,  Kevin Scoones

发明人： Neil Gibson ,  Kevin Scoones

IPC分类号： G05F1/00

CPC分类号： H02M3/1563

摘要： A converter has a main feedback path and two auxiliary feedback paths from an output node to an auxiliary differential input pair of a comparator. The auxiliary feedback paths have different RC time constants so that a differential ramp signal is effectively applied to the auxiliary differential inputs of the comparator. The circuit design compensates for a negligibly small equivalent series resistor of an output capacitor so that modern capacitors may be used without compromising the stable oscillation of the converter.

摘要翻译： A转换器具有从输出节点到比较器的辅助差分输入对的主反馈路径和两个辅助反馈路径。 辅助反馈路径具有不同的RC时间常数，使得差分斜坡信号有效地施加到比较器的辅助差分输入。 电路设计补偿了输出电容器的可忽略的小的等效串联电阻器，从而可以使用现代电容器，而不会影响转换器的稳定振荡。

公开(公告)号：US07183823B2

公开(公告)日：2007-02-27

申请号：US11080882

申请日：2005-03-15

申请人： Neil Gibson ,  Kevin Scoones

发明人： Neil Gibson ,  Kevin Scoones

IPC分类号： H03K5/12

CPC分类号： H03K7/08 ,  H03F3/217 ,  H03K5/06

摘要： In the proposed method of generating a pulsed output signal from a periodic ramp signal and a reference voltage, the linear range of duty cycles of the pulsed output signal is significantly extended to minimum values. The ramp signal and the reference voltage are applied to inputs of a comparator and the output signal is taken from an output of the comparator. The ramp signal has a ramp that extends between a minimum voltage level and a maximum voltage level. The duty cycle of the pulse signal is controlled by varying the reference voltage between the minimum and maximum voltage levels. The ramp has an initial start section extending from the minimum voltage level and a main section extending between the initial section and the maximum voltage level. The ramp slope has a constant value over the main ramp section and a value greater than the constant value over the initial section. In the initial section of the ramp the slope is varied in a manner to compensate for non-linearity of the comparator in an operating range where the reference voltage is close to the minimum voltage level of the ramp signal. It is also preferred to insert a short blanking period before the actual ramp of the waveform. The method can be used in switched mode power converters and in class-d amplifiers.

摘要翻译： 在从周期性斜坡信号和参考电压产生脉冲输出信号的所提出的方法中，脉冲输出信号的占空比的线性范围显着地扩展到最小值。 斜坡信号和参考电压被施加到比较器的输入，并且输出信号取自比较器的输出。 斜坡信号具有在最小电压电平和最大电压电平之间延伸的斜坡。 通过改变最小和最大电压电平之间的参考电压来控制脉冲信号的占空比。 斜坡具有从最小电压电平延伸的初始起始部分和在初始部分和最大电压电平之间延伸的主部分。 斜坡斜率在主斜坡段上具有恒定值，并且大于初始段上的常数值。 在斜坡的初始部分中，斜率以在参考电压接近斜坡信号的最小电压电平的操作范围内补偿比较器的非线性的方式变化。 还需要在波形的实际斜坡之前插入短的消隐期。 该方法可用于开关电源转换器和D类放大器。

公开(公告)号：US20050248378A1

公开(公告)日：2005-11-10

申请号：US11080882

申请日：2005-03-15

申请人： Neil Gibson ,  Kevin Scoones

发明人： Neil Gibson ,  Kevin Scoones

IPC分类号： H02M1/08 ,  H03F3/217 ,  H03K4/08 ,  H03K5/06 ,  H03K5/12 ,  H03K7/08

CPC分类号： H03K7/08 ,  H03F3/217 ,  H03K5/06

摘要： In the proposed method of generating a pulsed output signal from a periodic ramp signal and a reference voltage, the linear range of duty cycles of the pulsed output signal is significantly extended to minimum values. The ramp signal and the reference voltage are applied to inputs of a comparator and the output signal is taken from an output of the comparator. The ramp signal has a ramp that extends between a minimum voltage level and a maximum voltage level. The duty cycle of the pulse signal is controlled by varying the reference voltage between the minimum and maximum voltage levels. The ramp has an initial start section extending from the minimum voltage level and a main section extending between the initial section and the maximum voltage level. The ramp slope has a constant value over the main ramp section and a value greater than the constant value over the initial section. In the initial section of the ramp the slope is varied in a manner to compensate for non-linearity of the comparator in an operating range where the reference voltage is close to the minimum voltage level of the ramp signal. It is also preferred to insert a short blanking period before the actual ramp of the waveform. The method can be used in switched mode power converters and in class-d amplifiers.

摘要翻译： 在从周期性斜坡信号和参考电压产生脉冲输出信号的所提出的方法中，脉冲输出信号的占空比的线性范围显着地扩展到最小值。 斜坡信号和参考电压被施加到比较器的输入，并且输出信号取自比较器的输出。 斜坡信号具有在最小电压电平和最大电压电平之间延伸的斜坡。 通过改变最小和最大电压电平之间的参考电压来控制脉冲信号的占空比。 斜坡具有从最小电压电平延伸的初始起始部分和在初始部分和最大电压电平之间延伸的主部分。 斜坡斜率在主斜坡段上具有恒定值，并且大于初始段上的常数值。 在斜坡的初始部分中，斜率以在参考电压接近斜坡信号的最小电压电平的操作范围内补偿比较器的非线性的方式变化。 还需要在波形的实际斜坡之前插入短的消隐期。 该方法可用于开关电源转换器和D类放大器。

公开(公告)号：US20100308784A1

公开(公告)日：2010-12-09

申请号：US12792919

申请日：2010-06-03

申请人： Kevin Scoones ,  Gerhard Thiele ,  Neil Gibson

发明人： Kevin Scoones ,  Gerhard Thiele ,  Neil Gibson

IPC分类号： G05F1/10

CPC分类号： H02M3/157 ,  H02M1/32 ,  H02M3/1588 ,  H02M2001/0032 ,  Y02B70/1466

摘要： The invention relates to an electronic device and a method for DC-DC conversion using a comparator for generating an output signal for driving a power switch of a switch mode DC-DC converter. The electronic device is configured to reduce a bias current of the comparator with a first slope in response to a decreasing load and to increase the bias current of the comparator with a second slope in response to an increasing load, wherein the second slope is steeper than the first slope.

摘要翻译： 本发明涉及使用比较器产生用于驱动开关模式DC-DC转换器的电源开关的输出信号的DC-DC转换的电子装置和方法。 电子设备被配置为响应于负载的减小而以比第一斜率减小比较器的偏置电流，并且响应于增加的负载而以比第二斜率增加比较器的偏置电流，其中第二斜率比 第一个斜坡

公开(公告)号：US07259603B2

公开(公告)日：2007-08-21

申请号：US11080327

申请日：2005-03-15

申请人： Neil Gibson ,  Joerg Kirchner ,  Kevin Scoones

发明人： Neil Gibson ,  Joerg Kirchner ,  Kevin Scoones

IPC分类号： H03K5/12

CPC分类号： H02M3/156 ,  H02M2001/0025

摘要： A switch mode power converter is provided which includes a switching cell with a supply input, an output and a control input. A summing comparator has first and second differential input pairs and an output. The output is connected to the control input of the switching cell. An oscillator provides a periodic waveform that is applied to a first one of the inputs of the first differential input pair of the summing comparator. An adjustable reference voltage source provides an adjustable reference voltage a predetermined fraction of which is applied to a second one of the inputs of the first differential input pair of the summing comparator. An error amplifier has differential outputs coupled to the second pair of differential inputs of the summing comparator and a differential input pair. A first input of the differential input pair is coupled to the output of the switching cell, and the adjustable reference voltage from the adjustable reference voltage source is applied to a second input of the differential input pair. Thus, the desired DC voltage is scaled to produce a DC reference for the comparator which generates the desired duty cycle for the pulse signal that drives the switching cell, and thus the desired regulated output voltage, with only minor corrections required across the error terminals to correct small parasitic terms.

摘要翻译： 提供一种开关模式功率转换器，其包括具有电源输入，输出和控制输入的开关单元。 求和比较器具有第一和第二差分输入对和输出。 输出连接到开关单元的控制输入。 振荡器提供施加到求和比较器的第一差分输入对的第一输入端的周期性波形。 可调参考电压源提供可调参考电压，其预定分数被施加到求和比较器的第一差分输入对的第二输入端。 误差放大器具有耦合到求和比较器和差分输入对的第二对差分输入的差分输出。 差分输入对的第一输入耦合到开关单元的输出，并且来自可调参考电压源的可调参考电压被施加到差分输入对的第二输入。 因此，所需的直流电压被缩放以产生用于比较器的直流基准，该比较器为驱动开关电池的脉冲信号产生期望的占空比，并因此产生期望的调节输出电压，只需要跨越误差端子至少需要更正 纠正小寄生条件。

公开(公告)号：US20090058375A1

公开(公告)日：2009-03-05

申请号：US12190730

申请日：2008-08-13

申请人： Neil Gibson ,  Kevin Scoones

发明人： Neil Gibson ,  Kevin Scoones

IPC分类号： G05F1/613

CPC分类号： H02M3/1563

摘要： A converter has a main feedback path and two auxiliary feedback paths from an output node to an auxiliary differential input pair of a comparator. The auxiliary feedback paths have different RC time constants so that a differential ramp signal is effectively applied to the auxiliary differential inputs of the comparator. The circuit design compensates for a negligibly small equivalent series resistor of an output capacitor so that modern capacitors may be used without compromising the stable oscillation of the converter.

摘要翻译： A转换器具有从输出节点到比较器的辅助差分输入对的主反馈路径和两个辅助反馈路径。 辅助反馈路径具有不同的RC时间常数，使得差分斜坡信号有效地施加到比较器的辅助差分输入。 电路设计补偿了输出电容器的可忽略的小的等效串联电阻器，从而可以使用现代电容器，而不会影响转换器的稳定振荡。

公开(公告)号：US20050218874A1

公开(公告)日：2005-10-06

申请号：US11080327

申请日：2005-03-15

申请人： Neil Gibson ,  Joerg Kirchner ,  Kevin Scoones

发明人： Neil Gibson ,  Joerg Kirchner ,  Kevin Scoones

IPC分类号： G05F1/40 ,  H02M3/156

CPC分类号： H02M3/156 ,  H02M2001/0025

摘要： A switch mode power converter is provided which includes a switching cell with a supply input, an output and a control input. A summing comparator has first and second differential input pairs and an output. The output is connected to the control input of the switching cell. An oscillator provides a periodic waveform that is applied to a first one of the inputs of the first differential input pair of the summing comparator. An adjustable reference voltage source provides an adjustable reference voltage a predetermined fraction of which is applied to a second one of the inputs of the first differential input pair of the summing comparator. An error amplifier has differential outputs coupled to the second pair of differential inputs of the summing comparator and a differential input pair. A first input of the differential input pair is coupled to the output of the switching cell, and the adjustable reference voltage from the adjustable reference voltage source is applied to a second input of the differential input pair. Thus, the desired DC voltage is scaled to produce a DC reference for the comparator which generates the desired duty cycle for the pulse signal that drives the switching cell, and thus the desired regulated output voltage, with only minor corrections required across the error terminals to correct small parasitic terms.

摘要翻译： 提供一种开关模式功率转换器，其包括具有电源输入，输出和控制输入的开关单元。 求和比较器具有第一和第二差分输入对和输出。 输出连接到开关单元的控制输入。 振荡器提供施加到求和比较器的第一差分输入对的第一输入端的周期性波形。 可调参考电压源提供可调参考电压，其预定分数被施加到求和比较器的第一差分输入对的第二输入端。 误差放大器具有耦合到求和比较器和差分输入对的第二对差分输入的差分输出。 差分输入对的第一输入耦合到开关单元的输出，并且来自可调参考电压源的可调参考电压被施加到差分输入对的第二输入。 因此，所需的直流电压被缩放以产生用于比较器的直流基准，该比较器为驱动开关电池的脉冲信号产生期望的占空比，并因此产生期望的调节输出电压，只需要跨越误差端子至少需要更正 纠正小寄生条件。