公开(公告)号：US06445623B1

公开(公告)日：2002-09-03

申请号：US09934931

申请日：2001-08-22

Applicant: Haoran Zhang ,  Gregory S. Waterfall

Inventor： Haoran Zhang ,  Gregory S. Waterfall

IPC: G11C700

CPC classification number: H02M1/44 ,  G11C5/145 ,  H02M3/07

Abstract: A charge pump circuit is provided for reducing the voltage ripple and EMI associated with prior art circuits. The charge pump circuit is configured with at least one current source for suitably controlling the charging and/or discharging current in the charge pump capacitors the currents of the current sources are determined by the load current requirements, rather than the on-resistance of any switches or the ESR of any capacitors, thus allowing a significant reduction of the peak current drawn from the power supply as well as the peak current injected into the output reservoir capacitor. The charge pump circuit can be configured with a current source in series with the input supply voltage to control the total current in the charge pump. In addition, the charge pump circuit can be configured with current limited switches for controlling the total current. For example, current sources can be suitably configured to replace one or more switches in the charge pump circuit to effectively control the total current in the charge pump circuit. By feeding the charge pump capacitors with switched current sources, the voltage across the current sources can be suitably limited to the supply voltage or the output voltage. In addition, the current sources can operate as resistor devices with adjustable impedances, and be configured to suitably reduce or eliminate the excessive supply voltage across the current sources. Further, the switched current sources can comprise various current mirror configurations. As a result, the requirement for the breakdown voltage can be significantly reduced. In addition, through use of a low voltage process, the cost and packaging size can be suitably reduced.

Abstract translation: 提供电荷泵电路用于降低与现有技术电路相关联的电压纹波和EMI。 电荷泵电路配置有至少一个电流源，用于适当地控制电荷泵电容器中的充电和/或放电电流，电流源的电流由负载电流要求决定，而不是任何开关的导通电阻 或任何电容器的ESR，从而允许从电源吸取的峰值电流以及注入输出储能电容器的峰值电流显着降低。 电荷泵电路可以配置有与输入电源电压串联的电流源，以控制电荷泵中的总电流。 此外，电荷泵电路可以配置有用于控制总电流的电流限制开关。 例如，电流源可以被适当地配置成替换电荷泵电路中的一个或多个开关，以有效地控制电荷泵电路中的总电流。 通过向电荷泵电容器馈送开关电流源，电流源两端的电压可以适当地限于电源电压或输出电压。 此外，电流源可以作为具有可调阻抗的电阻器件工作，并且被配置为适当地减少或消除电流源上的过大电源电压。 此外，开关电流源可以包括各种电流镜配置。 结果，可以显着地降低击穿电压的要求。 此外，通过使用低电压工艺，可以适当降低成本和封装尺寸。

公开(公告)号：US07391262B2

公开(公告)日：2008-06-24

申请号：US11410367

申请日：2006-04-25

Applicant: Haoran Zhang

Inventor： Haoran Zhang

IPC: H03F3/45

CPC classification number: H03F3/45192 ,  H03F1/083 ,  H03F3/3022 ,  H03F3/45677 ,  H03F2200/453 ,  H03F2203/30033 ,  H03F2203/45248 ,  H03F2203/45318 ,  H03F2203/45342 ,  H03F2203/45352 ,  H03F2203/45366

Abstract: Amplifier circuitry includes an input stage having a transconductance stage including first and second input transistors and a first tail current source, gates of the first and second input transistors being coupled to first and second input signals, respectively. A bulk electrode capacitance driver includes third and fourth input transistors and first and second associated cascode transistors and a second tail current source coupled to the sources and bulk electrodes of the third and fourth input transistors and to the bulk electrodes of the first and second input transistors. The gates of the third and fourth input transistors are coupled to the first and second input voltage signals, respectively, and the gates of the first and second cascode transistors are coupled to the second and first input voltage signals, respectively.

Abstract translation: 放大器电路包括具有跨导级的输入级，该跨导级包括第一和第二输入晶体管和第一尾电流源，第一和第二输入晶体管的栅极分别耦合到第一和第二输入信号。 体电极电容驱动器包括第三和第四输入晶体管以及耦合到第三和第四输入晶体管的源极和体电极的第一和第二相关联的共源共栅晶体管以及耦合到第一和第二输入晶体管的体电极的第二尾电流源 。 第三和第四输入晶体管的栅极分别耦合到第一和第二输入电压信号，并且第一和第二共源共栅晶体管的栅极分别耦合到第二和第一输入电压信号。

公开(公告)号：US06794923B2

公开(公告)日：2004-09-21

申请号：US10233966

申请日：2002-09-03

Applicant: Rodney T. Burt ,  Haoran Zhang ,  Thomas L. Botker ,  Vadium V. Ivanov

Inventor： Rodney T. Burt ,  Haoran Zhang ,  Thomas L. Botker ,  Vadium V. Ivanov

IPC: H03K1716

CPC classification number: H02M3/07

Abstract: A charge pump circuit is configured for charging of parasitic capacitances associated with charge pump capacitors in a manner that minimizes voltage ripple. The charge pump circuit is suitably configured with an independent charging circuit configured for supplying the current needed to charge the parasitic capacitances, rather than utilizing the reservoir capacitor to supply the needed current. The independent charging circuit can be implemented with various configurations of charge pump circuits, such as single phase or dual phase charge pumps, and/or doubler, tripler or inverter configurations. The independent charging circuit includes a parasitic charging capacitor or other voltage source configured with one or more switch devices configured to facilitate charging of the parasitics during any phases of operation of the charge pump circuit. In addition, the independent charging circuit includes an independent cell, and is local to charge pump circuit for supplying the current for charging the parasitic capacitances, instead of having the current supplied through external bussing or wire bonds.

Abstract translation: 电荷泵电路被配置为以最小化电压纹波的方式对与电荷泵电容器相关联的寄生电容进行充电。 电荷泵电路适当地配置有独立的充电电路，其被配置为提供对寄生电容充电所需的电流，而不是利用储存电容器来提供所需的电流。 独立充电电路可以用电荷泵电路的各种配置来实现，例如单相或双相电荷泵，和/或倍增器，三倍或逆变器配置。 独立充电电路包括寄生充电电容器或配置有一个或多个开关装置的其它电压源，所述开关装置被配置为便于在电荷泵电路的任何操作阶段期间寄生物的充电。 此外，独立充电电路包括独立的电池，并且是局部用于对泵电路进行充电以提供用于对寄生电容充电的电流，而不是具有通过外部总线或引线接合提供的电流。

公开(公告)号：US06661683B2

公开(公告)日：2003-12-09

申请号：US10101050

申请日：2002-03-18

Applicant: Thomas L. Botker ,  Haoran Zhang

Inventor： Thomas L. Botker ,  Haoran Zhang

IPC: H02M318

CPC classification number: H02M3/07

Abstract: A charge pump circuit is configured for continuous control of the output of the charge pump circuit through continuous use of at least one charge pump capacitor coupled with a servo amplifier. During and between both phases of operation of the charge pump circuit, the output current from the servo amplifier can be set equal to the load current through a continuous path. This servo amplifier configuration facilitates the continuous regulation of the load current, during both phases of operation, as well as in between the phases, and as a result no load current is drawn from the output capacitor, thus requiring no recharge of the output capacitor. In addition, an exemplary charge pump circuit can be configured with level-shifting capabilities, the ability to facilitate the use of lower voltage processes, and the ability to provide a large DC open loop gain and high stability. In addition, an exemplary charge pump circuit can be configured with capabilities for buck/boost operation.

Abstract translation: 电荷泵电路被配置为通过连续使用与伺服放大器耦合的至少一个电荷泵电容器来连续控制电荷泵电路的输出。 在电荷泵电路的两相操作期间和两相之间，来自伺服放大器的输出电流可以被设置为等于通过连续路径的负载电流。 该伺服放大器配置有助于在两个工作阶段以及相间的负载电流的连续调节，并且因此不会从输出电容器抽出负载电流，从而不需要输出电容器的再充电。 此外，示例性电荷泵电路可以配置有电平转换能力，便于使用较低电压工艺的能力，以及提供大直流开环增益和高稳定性的能力。 此外，示例性电荷泵电路可以被配置为降压/升压操作的能力。

公开(公告)号：US20070247227A1

公开(公告)日：2007-10-25

申请号：US11410367

申请日：2006-04-25

Applicant: Haoran Zhang

Inventor： Haoran Zhang

IPC: H03F3/45

CPC classification number: H03F3/45192 ,  H03F1/083 ,  H03F3/3022 ,  H03F3/45677 ,  H03F2200/453 ,  H03F2203/30033 ,  H03F2203/45248 ,  H03F2203/45318 ,  H03F2203/45342 ,  H03F2203/45352 ,  H03F2203/45366

Abstract: Amplifier circuitry includes an input stage having a transconductance stage including first and second input transistors and a first tail current source, gates of the first and second input transistors being coupled to first and second input signals, respectively. A bulk electrode capacitance driver includes third and fourth input transistors and first and second associated cascode transistors and a second tail current source coupled to the sources and bulk electrodes of the third and fourth input transistors and to the bulk electrodes of the first and second input transistors. The gates of the third and fourth input transistors are coupled to the first and second input voltage signals, respectively, and the gates of the first and second cascode transistors are coupled to the second and first input voltage signals, respectively.

Abstract translation: 放大器电路包括具有跨导级的输入级，该跨导级包括第一和第二输入晶体管和第一尾电流源，第一和第二输入晶体管的栅极分别耦合到第一和第二输入信号。 体电极电容驱动器包括第三和第四输入晶体管以及耦合到第三和第四输入晶体管的源极和体电极的第一和第二相关联的共源共栅晶体管以及耦合到第一和第二输入晶体管的体电极的第二尾电流源 。 第三和第四输入晶体管的栅极分别耦合到第一和第二输入电压信号，并且第一和第二共源共栅晶体管的栅极分别耦合到第二和第一输入电压信号。

公开(公告)号：US06618296B2

公开(公告)日：2003-09-09

申请号：US10201189

申请日：2002-07-22

Applicant: Haoran Zhang

Inventor： Haoran Zhang

IPC: G11C700

CPC classification number: H02M3/07 ,  G11C5/145

Abstract: A charge pump circuit is configured for suitably controlling the charging current in the charge pump capacitors. The charge pump circuit comprises an input current controlling circuit comprising a current limiting device for controlling the inrush current, and thus the charging current in the charge pump capacitors. The input current controlling circuit is configured to regulate the average voltage at the output of the current limiting device to correspond to the average voltage at the output of a pass device configured for regulating the output current. Accordingly, the total input current, and thus the charging current in the charge pump capacitors, can be suitably controlled at all times to significantly reduce the impact of any instantaneous charging currents.

Abstract translation: 电荷泵电路被配置为适当地控制电荷泵电容器中的充电电流。 电荷泵电路包括输入电流控制电路，其包括用于控制浪涌电流的限流装置，从而控制电荷泵电容器中的充电电流。 输入电流控制电路被配置为调节限流装置的输出处的平均电压，以对应于被配置为调节输出电流的通过装置的输出处的平均电压。 因此，可以始终适当地控制总输入电流以及电荷泵电容器中的充电电流，以显着降低任何瞬时充电电流的影响。

公开(公告)号：US20110262971A1

公开(公告)日：2011-10-27

申请号：US12764230

申请日：2010-04-21

Applicant: Blaine Pfeifer ,  Haoran Zhang

Inventor： Blaine Pfeifer ,  Haoran Zhang

IPC: C12P19/62 ,  C12N1/21

CPC classification number: C12P19/62 ,  C12N15/52

Abstract: Genetically modified E. coli strains capable of producing erythromycins, particularly erythromycin A.

Abstract translation: 能够产生红霉素，特别是红霉素A的转基因大肠杆菌菌株。

公开(公告)号：US06703816B2

公开(公告)日：2004-03-09

申请号：US10190931

申请日：2002-07-08

Applicant: Hubert J. Biagi ,  Haoran Zhang ,  Thomas L. Botker

Inventor： Hubert J. Biagi ,  Haoran Zhang ,  Thomas L. Botker

IPC: G05F140

CPC classification number: G05F1/575

Abstract: A composite loop compensation circuit and method for a low drop-out regulator configured to facilitate stable operation at very low output load currents is provided. An exemplary low drop-out regulator includes an error amplifier, a pass device, and a composite loop compensation circuit. The compensation loop compensation circuit includes a plurality of segmented sense devices, a plurality of switches and a biasing component. The plurality of segmented sense devices are configured to sense an output load current, i.e., the current from the output terminal of the pass device. The plurality of switches are coupled between the plurality of segmented sense devices and a biasing component. Composite loop compensation circuit is configured to adjust the dominant first pole of the composite feedback loop based on the output load current through biasing of the active resistor component. As a result, the low drop-out regulator can include a very large pass device form addressing high currents and can remain stable for extremely low currents.

Abstract translation: 提供了一种用于在非常低的输出负载电流下促进稳定操作的低压差稳压器的复合环路补偿电路和方法。 示例性的低压差调节器包括误差放大器，通过装置和复合环路补偿电路。 补偿环路补偿电路包括多个分段感测装置，多个开关和偏置部件。 多个分段感测装置被配置为感测输出负载电流，即，从通过装置的输出端子的电流。 多个开关耦合在多个分段感测装置和偏置部件之间。 复合环路补偿电路被配置为基于通过有源电阻器部件的偏置的输出负载电流来调整复合反馈回路的主要第一极点。 因此，低压差稳压器可以包括非常大的通过器件形式，用于寻址高电流，并且可以在极低电流下保持稳定。