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    Bandgap circuit with low power consumption
    1.
    发明授权
    Bandgap circuit with low power consumption 有权

    公开(公告)号：US12111676B2

    公开(公告)日：2024-10-08

    申请号：US17947465

    申请日：2022-09-19

    申请人： Apple Inc.

    发明人： Giulio Maria Iadicicco ,  Angelo Bassi

    IPC分类号： G05F3/26

    CPC分类号： G05F3/265

    摘要： A bandgap circuit that is area efficient and has a low power consumption. The bandgap circuit includes a voltage generator circuit, and a sample and hold circuit coupled to the voltage generator circuit. The voltage generator circuit includes a pair of transistors each connected in a diode configuration and biased with a respective current source of a plurality of current sources of the voltage generator circuit. During a sample phase, the sample and hold circuit samples a first voltage between a first base and a first emitter of a first transistor of the pair of transistors and a second voltage between a second base and a second emitter of a second transistor of the pair of transistors. During a hold phase subsequent to the sample phase, the sample and hold circuit generates an output voltage as a combination of the sampled first and second voltages.

    TEMPERATURE COMPENSATED CONSTANT CURRENT SYSTEM AND METHOD
    5.
    发明申请
    TEMPERATURE COMPENSATED CONSTANT CURRENT SYSTEM AND METHOD 审中-公开

    公开(公告)号：US20180034447A1

    公开(公告)日：2018-02-01

    申请号：US15220327

    申请日：2016-07-26

    申请人： SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC

    发明人： Jacques Jean BERTIN

    IPC分类号： H03K3/011 ,  G05F3/26

    CPC分类号： H03K3/011 ,  G05F3/265 ,  G05F3/30 ,  H01L23/58

    摘要： A current reference circuit includes a voltage generating device, a resistor, one or more diodes, and a thermal bridge including one or more metal alloy contacts disposed on a substrate. The voltage generating device and the resistor have similar temperature coefficients. The diodes are thermally connected to the voltage generating device through the substrate. The metal alloy contacts are coupled between the diodes and the resistor. The diodes form a reverse bias junction when the compensation circuit is energized such that the thermal bridge may provide thermal conduction between the voltage generating device and the resistor.

    Method and circuit for low power voltage reference and bias current generator
    6.
    发明授权
    Method and circuit for low power voltage reference and bias current generator 有权

    公开(公告)号：US09851739B2

    公开(公告)日：2017-12-26

    申请号：US14954247

    申请日：2015-11-30

    申请人： Analog Devices, Inc.

    发明人： Stefan Marinca

    IPC分类号： G05F3/30 ,  G05F3/26

    CPC分类号： G05F3/265 ,  G05F3/30

    摘要： Circuits for generating a PTAT voltage as a base-emitter voltage difference between a pair of bipolar transistors. The circuits may form unit cells in a cascading voltage reference circuit that increases the PTAT voltage with each subsequent stage. The bipolar transistors are controlled using a biasing arrangement that includes an MOS transistor connected to a current mirror that provides the base current for the bipolar transistors. A voltage reference is formed by combining a PTAT voltage and a CTAT voltage at the last stage. The voltage reference may be obtained from the voltage at an emitter of one of the bipolar transistors in the last stage.

    Precision current sensing
    7.
    发明授权
    Precision current sensing 有权
    精密电流检测

    公开(公告)号：US09519303B2

    公开(公告)日：2016-12-13

    申请号：US14176795

    申请日：2014-02-10

    申请人： Infineon Technologies AG

    发明人： Fabio Ballarin ,  Marco Piselli ,  Fabio Gini ,  Stefano Zampieri

    IPC分类号： G05F3/26 ,  H02M3/158 ,  G05F3/22

    CPC分类号： G05F3/262 ,  G05F3/222 ,  G05F3/265 ,  H02M3/1584

    摘要： Example current tracking circuits and systems as well as methods for tracking current are described herein. In one example, a current tracking circuit comprises a current mirror that receives a power supply input and a control signal as inputs, wherein the current mirror has a mirror ratio. The current tracking circuit also comprises a programmability sub-circuit coupled to the current mirror that trims a value of the mirror ratio. In another example, a method comprises performing current mirroring using a current mirror comprising a sense device, wherein a mirror ratio of the current mirror is based on a programmable sub-circuit. The method further comprises maintaining, by a voltage regulation loop, a collector potential of the sense device within a threshold difference level of a collector potential of a power device coupled to the sense device, wherein the sense device mirrors a current flowing in the power device.

    摘要翻译： 本文描述了电流跟踪电路和系统的示例以及跟踪电流的方法。 在一个示例中，电流跟踪电路包括接收电源输入和控制信号作为输入的电流镜，其中电流镜具有镜像比。 电流跟踪电路还包括耦合到电流镜的可编程子电路，其修整镜像比的值。 在另一示例中，一种方法包括使用包括感测装置的电流镜执行电流镜像，其中电流镜的镜像比基于可编程子电路。 该方法还包括通过电压调节回路将感测装置的集电极电位维持在耦合到感测装置的功率器件的集电极电位的阈值差水平之内，其中感测装置反射在功率装置中流动的电流 。

    Method and circuit for low power voltage reference and bias current generator
    8.
    发明授权
    Method and circuit for low power voltage reference and bias current generator 有权
    低功率参考电压和偏置电流发生器的方法和电路

    公开(公告)号：US09218015B2

    公开(公告)日：2015-12-22

    申请号：US13648639

    申请日：2012-10-10

    申请人： Analog Devices, Inc.

    发明人： Stefan Marinca

    IPC分类号： G05F3/30

    CPC分类号： G05F3/265 ,  G05F3/30

    摘要： Circuits for generating a PTAT voltage as a base-emitter voltage difference between a pair of bipolar transistors. The circuits may form unit cells in a cascading voltage reference circuit that increases the PTAT voltage with each subsequent stage. The bipolar transistors are controlled using a biasing arrangement that includes an MOS transistor connected to a current mirror that provides the base current for the bipolar transistors. A voltage reference is formed by combining a PTAT voltage and a CTAT voltage at the last stage. The voltage reference may be obtained from the voltage at an emitter of one of the bipolar transistors in the last stage.

    摘要翻译： 用于产生PTAT电压作为一对双极晶体管之间的基极 - 发射极电压差的电路。 这些电路可以在级联电压参考电路中形成单元，以增加每个后续级的PTAT电压。 使用偏置装置来控制双极晶体管，该偏置装置包括连接到提供双极晶体管的基极电流的电流镜的MOS晶体管。 通过在最后阶段组合PTAT电压和CTAT电压来形成参考电压。 可以从最后一级的双极晶体管之一的发射极处的电压获得电压基准。

    PRECISION CURRENT SENSING
    9.
    发明申请
    PRECISION CURRENT SENSING 有权
    精密电流传感器

    公开(公告)号：US20150227157A1

    公开(公告)日：2015-08-13

    申请号：US14176795

    申请日：2014-02-10

    申请人： INFINEON TECHNOLOGIES AG

    发明人： Fabio Ballarin ,  Marco Piselli ,  Fabio Gini ,  Stefano Zampieri

    IPC分类号： G05F3/26

    CPC分类号： G05F3/262 ,  G05F3/222 ,  G05F3/265 ,  H02M3/1584

    摘要： Example current tracking circuits and systems as well as methods for tracking current are described herein. In one example, a current tracking circuit comprises a current mirror that receives a power supply input and a control signal as inputs, wherein the current mirror has a mirror ratio. The current tracking circuit also comprises a programmability sub-circuit coupled to the current mirror that trims a value of the mirror ratio. In another example, a method comprises performing current mirroring using a current mirror comprising a sense device, wherein a mirror ratio of the current mirror is based on a programmable sub-circuit. The method further comprises maintaining, by a voltage regulation loop, a collector potential of the sense device within a threshold difference level of a collector potential of a power device coupled to the sense device, wherein the sense device mirrors a current flowing in the power device.

    摘要翻译： 本文描述了电流跟踪电路和系统的示例以及跟踪电流的方法。 在一个示例中，电流跟踪电路包括接收电源输入和控制信号作为输入的电流镜，其中电流镜具有镜像比。 电流跟踪电路还包括耦合到电流镜的可编程子电路，其修整镜像比的值。 在另一示例中，一种方法包括使用包括感测装置的电流镜执行电流镜像，其中电流镜的镜像比基于可编程子电路。 该方法还包括通过电压调节回路将感测装置的集电极电位维持在耦合到感测装置的功率器件的集电极电位的阈值差水平之内，其中感测装置反射在功率装置中流动的电流 。

    Current source with low power consumption and reduced on-chip area occupancy
    10.
    发明授权
    Current source with low power consumption and reduced on-chip area occupancy 有权
    电流源具有低功耗和片上占用面积

    公开(公告)号：US08729883B2

    公开(公告)日：2014-05-20

    申请号：US13171491

    申请日：2011-06-29

    申请人： Yanyi L. Wong ,  Agustinus Sutandi

    发明人： Yanyi L. Wong ,  Agustinus Sutandi

    IPC分类号： G05F3/04

    CPC分类号： G05F3/262 ,  G05F3/265

    摘要： A current source with low power consumption and reduced on-chip area occupancy. The current source for providing a constant current to a load includes a first circuit that generates a reference current. The first circuit includes a first plurality of interconnected transistors. The current source also includes a characteristic resistor, coupled to the first circuit, that determines value of the reference current. The current source further includes a second circuit and a third circuit. The second circuit, coupled to the first circuit and to the load, generates an output current that is identical to the reference current. The second circuit includes a second plurality of interconnected transistors. The third circuit, coupled to the first circuit, drives a multiple of the reference current into the characteristic resistor. The third circuit includes a third plurality of interconnected transistors.

    摘要翻译： 电流源，功耗低，片上占用空间小。 用于向负载提供恒定电流的电流源包括产生参考电流的第一电路。 第一电路包括第一多个互连晶体管。 电流源还包括耦合到第一电路的特性电阻器，其确定参考电流的值。 电流源还包括第二电路和第三电路。 耦合到第一电路和负载的第二电路产生与参考电流相同的输出电流。 第二电路包括第二多个互连的晶体管。 耦合到第一电路的第三电路将参考电流的倍数驱动到特征电阻器中。 第三电路包括第三多个互连晶体管。