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公开(公告)号：US09455626B2
公开(公告)日：2016-09-27
申请号：US14205025
申请日：2014-03-11
申请人： Micrel, Inc.
发明人： Dashun Xue , William MacLean
CPC分类号： H02M3/156 , H02M3/158 , H02M2001/0025 , H02M2001/007
摘要： A buck switching regulator includes a feedback control circuit using a four-input comparator to regulate the output voltage to a substantially constant level with reduced voltage offset and with fast transient response. In some embodiments, the buck switching regulator uses the four-input comparator to compare a first feedback signal without ripple and a second feedback signal with injected ripple components to a reference level. The four-input comparator generates an output signal to control the switching of the power switches. The buck switching regulator generates an output voltage with increased accuracy and fast transient response. Furthermore, the buck switching regulator can be used with output capacitor having any value of ESR.
摘要翻译： 降压开关调节器包括使用四输入比较器的反馈控制电路，以将输出电压调节到具有降低的电压偏移和快速瞬态响应的基本上恒定的电平。 在一些实施例中，降压开关调节器使用四输入比较器来将没有波纹的第一反馈信号和具有注入的波纹分量的第二反馈信号与参考电平进行比较。 四输入比较器产生一个输出信号来控制电源开关的切换。 降压开关调节器以更高的精度和快速的瞬态响应产生输出电压。 此外，降压开关稳压器可以与具有任何ESR值的输出电容器一起使用。
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公开(公告)号：US09201438B2
公开(公告)日：2015-12-01
申请号：US13678322
申请日：2012-11-15
申请人： Micrel, Inc.
发明人： William MacLean , Dashun Xue , Leland Swanson
CPC分类号： G05F1/62 , H02M1/00 , H02M3/1588 , H02M2001/0025 , H02M2003/1566 , Y02B70/1466
摘要： A buck switching regulator includes a feedback control circuit including a first gain circuit generating a first feedback signal indicative of the regulated output voltage; a ripple generation circuit generating a ripple signal that is injected to the first feedback signal; and a comparator receiving a first reference signal and the first feedback signal to generate a comparator output signal. The switching regulator further includes an offset compensation circuit including a second gain circuit generating a second feedback signal indicative of the regulated output voltage; and an operational transconductance amplifier (OTA) configured to receive the second feedback signal and the first reference signal and to generate an output signal. The output signal of the OTA is coupled to the comparator to adjust an offset to the comparator so as to cancel the offset at the regulated output voltage due to the injected ripple signal.
摘要翻译： 降压开关调节器包括反馈控制电路，该反馈控制电路包括产生指示调节输出电压的第一反馈信号的第一增益电路; 纹波产生电路，产生注入到第一反馈信号的纹波信号; 以及比较器，接收第一参考信号和第一反馈信号以产生比较器输出信号。 开关调节器还包括偏移补偿电路，其包括产生指示调节输出电压的第二反馈信号的第二增益电路; 以及配置成接收第二反馈信号和第一参考信号并产生输出信号的运算跨导放大器（OTA）。 OTA的输出信号被耦合到比较器以调整比较器的偏移量，以便消除由于注入的纹波信号引起的调节输出电压的偏移。
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公开(公告)号：US20150263617A1
公开(公告)日：2015-09-17
申请号：US14205025
申请日：2014-03-11
申请人： Micrel, Inc.
发明人： Dashun Xue , William MacLean
IPC分类号： H02M3/158
CPC分类号： H02M3/156 , H02M3/158 , H02M2001/0025 , H02M2001/007
摘要： A buck switching regulator includes a feedback control circuit using a four-input comparator to regulate the output voltage to a substantially constant level with reduced voltage offset and with fast transient response. In some embodiments, the buck switching regulator uses the four-input comparator to compare a first feedback signal without ripple and a second feedback signal with injected ripple components to a reference level. The four-input comparator generates an output signal to control the switching of the power switches. The buck switching regulator generates an output voltage with increased accuracy and fast transient response. Furthermore, the buck switching regulator can be used with output capacitor having any value of ESR.
摘要翻译： 降压开关调节器包括使用四输入比较器的反馈控制电路，以将输出电压调节到具有降低的电压偏移和快速瞬态响应的基本上恒定的电平。 在一些实施例中，降压开关调节器使用四输入比较器来将没有波纹的第一反馈信号和具有注入的波纹分量的第二反馈信号与参考电平进行比较。 四输入比较器产生一个输出信号来控制电源开关的切换。 降压开关调节器以更高的精度和快速的瞬态响应产生输出电压。 此外，降压开关稳压器可以与具有任何ESR值的输出电容器一起使用。
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公开(公告)号：US20140132232A1
公开(公告)日：2014-05-15
申请号：US13678322
申请日：2012-11-15
申请人： MICREL, INC.
发明人： William MacLean , Dashun Xue , Leland Swanson
IPC分类号： G05F1/62
CPC分类号： G05F1/62 , H02M1/00 , H02M3/1588 , H02M2001/0025 , H02M2003/1566 , Y02B70/1466
摘要： A buck switching regulator includes a feedback control circuit including a first gain circuit generating a first feedback signal indicative of the regulated output voltage; a ripple generation circuit generating a ripple signal that is injected to the first feedback signal; and a comparator receiving a first reference signal and the first feedback signal to generate a comparator output signal. The switching regulator further includes an offset compensation circuit including a second gain circuit generating a second feedback signal indicative of the regulated output voltage; and an operational transconductance amplifier (OTA) configured to receive the second feedback signal and the first reference signal and to generate an output signal. The output signal of the OTA is coupled to the comparator to adjust an offset to the comparator so as to cancel the offset at the regulated output voltage due to the injected ripple signal.
摘要翻译： 降压开关调节器包括反馈控制电路，该反馈控制电路包括产生指示调节输出电压的第一反馈信号的第一增益电路; 纹波产生电路，产生注入到第一反馈信号的纹波信号; 以及比较器，接收第一参考信号和第一反馈信号以产生比较器输出信号。 开关调节器还包括偏移补偿电路，其包括产生指示调节输出电压的第二反馈信号的第二增益电路; 以及配置成接收第二反馈信号和第一参考信号并产生输出信号的运算跨导放大器（OTA）。 OTA的输出信号被耦合到比较器以调整比较器的偏移量，以便消除由于注入的纹波信号引起的调节输出电压的偏移。
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公开(公告)号：US08643415B1
公开(公告)日：2014-02-04
申请号：US13657683
申请日：2012-10-22
申请人： Micrel, Inc.
发明人： Dashun Xue
IPC分类号： H03L7/06
CPC分类号： H03L7/0895
摘要： A filter circuit in a phase-locked loop circuit includes a capacitor coupled between a control voltage node and a first node; and a variable resistive element coupled between the first node and a ground potential. The variable resistive element has a resistance value modulated by a current proportional to the charge pump current of the charge pump. In one embodiment, the variable resistive element is a MOS transistor biased in the linear region and having a drain-to-source resistance modulated by the current proportional to the charge pump current.
摘要翻译： 锁相环电路中的滤波电路包括耦合在控制电压节点和第一节点之间的电容器; 以及耦合在第一节点和地电位之间的可变电阻元件。 可变电阻元件具有由与电荷泵的电荷泵电流成比例的电流调制的电阻值。 在一个实施例中，可变电阻元件是偏置在线性区域中并具有由与电荷泵电流成比例的电流调制的漏极 - 源极电阻的MOS晶体管。
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公开(公告)号：US09467043B2
公开(公告)日：2016-10-11
申请号：US14226548
申请日：2014-03-26
申请人： Micrel, Inc.
发明人： Dashun Xue , William MacLean
CPC分类号： H02M3/156 , H02M3/157 , H02M3/158 , H02M3/1588 , H02M2001/0012 , Y02B70/1466
摘要： A buck switching regulator implements a fixed frequency feedback control circuit including a voltage control loop and a frequency control loop to regulate the switching frequency of the buck switching regulator to a fixed or nearly fixed frequency. The voltage control loop, implementing ripple mode control, is configured to control the power switches in response to the switching regulator output voltage or a signal related to the switching regulator output voltage. The frequency control loop, implementing a phase-locked loop control scheme, is configured to adjust the on-time of the high-side switch so as to regulate the switching frequency to be equal to or be proportional to the reference frequency.
摘要翻译： 降压开关调节器实现固定频率反馈控制电路，其包括电压控制回路和频率控制回路，以将降压开关调节器的开关频率调节到固定或几乎固定的频率。 实现纹波模式控制的电压控制环路被配置为响应于开关稳压器输出电压或与开关稳压器输出电压相关的信号来控制功率开关。 实施锁相环控制方案的频率控制回路被配置为调节高侧开关的导通时间，以将开关频率调节为等于或与参考频率成比例。
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公开(公告)号：US20150280557A1
公开(公告)日：2015-10-01
申请号：US14226548
申请日：2014-03-26
申请人： Micrel, Inc.
发明人： Dashun Xue , William MacLean
CPC分类号： H02M3/156 , H02M3/157 , H02M3/158 , H02M3/1588 , H02M2001/0012 , Y02B70/1466
摘要： A buck switching regulator implements a fixed frequency feedback control circuit including a voltage control loop and a frequency control loop to regulate the switching frequency of the buck switching regulator to a fixed or nearly fixed frequency. The voltage control loop, implementing ripple mode control, is configured to control the power switches in response to the switching regulator output voltage or a signal related to the switching regulator output voltage. The frequency control loop, implementing a phase-locked loop control scheme, is configured to adjust the on-time of the high-side switch so as to regulate the switching frequency to be equal to or be proportional to the reference frequency.
摘要翻译： 降压开关调节器实现固定频率反馈控制电路，其包括电压控制回路和频率控制回路，以将降压开关调节器的开关频率调节到固定或几乎固定的频率。 实现纹波模式控制的电压控制环路被配置为响应于开关稳压器输出电压或与开关稳压器输出电压相关的信号来控制功率开关。 实施锁相环控制方案的频率控制回路被配置为调节高侧开关的导通时间，以将开关频率调节为等于或与参考频率成比例。
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公开(公告)号：US08890499B2
公开(公告)日：2014-11-18
申请号：US13793953
申请日：2013-03-11
申请人： Micrel, Inc.
发明人： Leland Swanson , Dashun Xue , William MacLean
CPC分类号： H02M3/156 , H02M2001/0025
摘要： A buck switching regulator includes a feedback control circuit including a feedback network including first and second gain circuits configured to generate first and second feedback signals, respectively, indicative of the regulated output voltage; a ripple generation circuit configured to inject a ripple signal to the first gain circuit; an operational transconductance amplifier (OTA) configured to receive the second feedback signal and a reference signal and to generate an output signal being coupled to the first gain circuit to adjust the first feedback signal; and a comparator configured to receive the first feedback signal and the reference signal and to generate a comparator output signal. The output signal of the OTA is applied to the first feedback signal to cancel a voltage offset in the regulated output voltage due to the injected ripple signal to the first gain circuit.
摘要翻译： 降压开关调节器包括反馈控制电路，该反馈控制电路包括反馈网络，该反馈网络包括分别产生指示稳压输出电压的第一和第二反馈信号的第一和第二增益电路; 纹波生成电路，被配置为向第一增益电路注入纹波信号; 配置成接收第二反馈信号和参考信号并且产生耦合到第一增益电路的输出信号以调整第一反馈信号的运算跨导放大器（OTA） 以及比较器，被配置为接收第一反馈信号和参考信号并产生比较器输出信号。 OTA的输出信号被施加到第一反馈信号，以消除由于向第一增益电路的注入纹波信号而在稳压输出电压中的电压偏移。
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公开(公告)号：US20140253082A1
公开(公告)日：2014-09-11
申请号：US13793953
申请日：2013-03-11
申请人： MICREL, INC.
发明人： Leland Swanson , Dashun Xue , William MacLean
IPC分类号： H02M3/156
CPC分类号： H02M3/156 , H02M2001/0025
摘要： A buck switching regulator includes a feedback control circuit including a feedback network including first and second gain circuits configured to generate first and second feedback signals, respectively, indicative of the regulated output voltage; a ripple generation circuit configured to inject a ripple signal to the first gain circuit; an operational transconductance amplifier (OTA) configured to receive the second feedback signal and a reference signal and to generate an output signal being coupled to the first gain circuit to adjust the first feedback signal; and a comparator configured to receive the first feedback signal and the reference signal and to generate a comparator output signal. The output signal of the OTA is applied to the first feedback signal to cancel a voltage offset in the regulated output voltage due to the injected ripple signal to the first gain circuit.
摘要翻译： 降压开关调节器包括反馈控制电路，该反馈控制电路包括反馈网络，该反馈网络包括分别产生指示稳压输出电压的第一和第二反馈信号的第一和第二增益电路; 纹波生成电路，被配置为向第一增益电路注入纹波信号; 配置成接收第二反馈信号和参考信号并且产生耦合到第一增益电路的输出信号以调整第一反馈信号的运算跨导放大器（OTA） 以及比较器，被配置为接收第一反馈信号和参考信号并产生比较器输出信号。 OTA的输出信号被施加到第一反馈信号，以消除由于向第一增益电路的注入纹波信号而在稳压输出电压中的电压偏移。
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公开(公告)号：US08593125B1
公开(公告)日：2013-11-26
申请号：US13657674
申请日：2012-10-22
申请人： Micrel, Inc.
发明人： Dashun Xue
IPC分类号： G05F1/00
CPC分类号： H02M3/156 , H02M1/15 , H02M2003/1566
摘要： A buck switching regulator includes a feedback control circuit including a first gain circuit configured to generate a first feedback signal indicative of the regulated output voltage; a ripple generation circuit configured to generate a ripple signal using the switching output voltage and to inject the ripple signal to the first feedback signal; a second gain circuit configured to generate a second feedback signal indicative of the regulated output voltage; an operational transconductance amplifier (OTA) configured to generate an output signal having a magnitude indicative the difference between the second feedback signal and the first reference signal; and a comparator configured to generate a comparator output signal having an output level indicative of the difference between the output signal of the OTA and the first feedback signal. As thus configured, the buck switching regulator generates an output voltage with increased accuracy and fast transient response.
摘要翻译： 降压开关调节器包括反馈控制电路，该反馈控制电路包括：第一增益电路，被配置为产生指示调节输出电压的第一反馈信号; 纹波生成电路，被配置为使用所述开关输出电压产生纹波信号，并将纹波信号注入到所述第一反馈信号中; 第二增益电路，被配置为产生指示所述调节的输出电压的第二反馈信号; 被配置为产生具有指示第二反馈信号和第一参考信号之间的差的幅度的输出信号的运算跨导放大器（OTA）; 以及比较器，被配置为产生具有表示所述OTA的输出信号与所述第一反馈信号之间的差的输出电平的比较器输出信号。 如此配置，降压开关调节器产生具有增加的精度和快速瞬态响应的输出电压。
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