公开(公告)号：US20190204863A1

公开(公告)日：2019-07-04

申请号：US16157077

申请日：2018-10-10

申请人： RichWave Technology Corp.

发明人： Hwey-Ching Chien

IPC分类号： G05F3/22 ,  H03F3/45 ,  G05F3/20

CPC分类号： G05F3/222 ,  G05F3/20 ,  H03F3/4508 ,  H03F2203/45022 ,  H03F2203/45318 ,  H03F2203/45352

摘要： A reference voltage generator includes a voltage generation circuit, an amplifier, a diode unit and a transistor. The voltage generation circuit includes an output terminal for outputting a reference voltage, a first terminal having an operational voltage, and a second terminal. The amplifier includes an input terminal coupled to the first terminal of the voltage generation circuit, an output terminal, a first terminal coupled to a first voltage terminal, and a second terminal. The diode unit includes a first terminal coupled to the second terminal of the amplifier, and a second terminal coupled to the second terminal of the voltage generation circuit and a second voltage terminal. The transistor includes a first terminal coupled to the first terminal of the amplifier, a second terminal coupled to the output terminal of the voltage generation circuit, and a control terminal coupled to the output terminal of the amplifier.

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 。

公开(公告)号：US20150309525A1

公开(公告)日：2015-10-29

申请号：US14263136

申请日：2014-04-28

申请人： Texas Instruments Incorporated

发明人： Xiao Pu ,  Krishnaswamy Nagaraj ,  Yue Hu

IPC分类号： G05F3/22 ,  G05F3/30

CPC分类号： G05F3/222 ,  G05F3/30

摘要： A voltage reference circuit includes a bipolar transistor and a circuit configured to measure the ratio of emitter current to base current of the bipolar transistor. The output voltage of the voltage reference circuit is compensated as a function of the measured ratio.

摘要翻译： 电压参考电路包括双极晶体管和被配置为测量双极晶体管的发射极电流与基极电流的比率的电路。 电压参考电路的输出电压作为测量比的函数进行补偿。

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 。

公开(公告)号：US20050046406A1

公开(公告)日：2005-03-03

申请号：US10911467

申请日：2004-08-04

申请人： Paolo Menegoli ,  Carl Sawtell

发明人： Paolo Menegoli ,  Carl Sawtell

IPC分类号： G05F3/22 ,  G05F3/16

CPC分类号： G05F3/222 ,  Y10S323/907

摘要： Several methods to obtain process insensitive base-emitter forward voltage of a transistor are described. The main concept is to recognize that the transistor current gain is the parameter that affects this voltage the most with normal process variations. The use of transistor driven with known base current removes this error. In alternative, a method for compensating the base-emitter forward voltage variations is described. This is applicable to analog integrated circuits that utilize the base-emitter forward voltage of a transistor and in particular in applications that make use of either accurate voltage references, thermal sensing elements, solid state thermostats and very common thermal shutdown protection circuits.

摘要翻译： 描述获得晶体管的过程不敏感的基极 - 发射极正向电压的几种方法。 主要的概念是认识到晶体管电流增益是在正常工艺变化下影响最大电压的参数。 使用已知基极电流驱动的晶体管消除了这个错误。 替代地，描述了用于补偿基极 - 发射极正向电压变化的方法。 这适用于使用晶体管的基极 - 发射极正向电压的模拟集成电路，特别是在使用精确的电压基准，热敏元件，固态恒温器和非常常见的热关断保护电路的应用中。

公开(公告)号：US06515462B2

公开(公告)日：2003-02-04

申请号：US09779709

申请日：2001-02-09

申请人： Koichi Inoue ,  Hirokazu Oki

发明人： Koichi Inoue ,  Hirokazu Oki

IPC分类号： G05F316

CPC分类号： G05F3/222 ,  Y10T307/858

摘要： A power supply device produces a predetermined voltage from a supply voltage through a voltage follower composed of a plurality of transistors. The voltage follower has a function of preventing backflow current. The voltage follower has one end connected to the supply voltage and another end connected to a capacitor. A constant voltage generating circuit produces a constant voltage from the voltage across the capacitor. A switch circuit is connected between the supply voltage and the control electrode of one of the transistors constituting the voltage follower other than the first-stage transistor thereof. A voltage drop detecting circuit detects a drop below a predetermined level in the voltage across the capacitor, and turns on the switch circuit on detecting such a drop.

摘要翻译： 电源装置通过由多个晶体管组成的电压跟随器从电源电压产生预定电压。 电压跟随器具有防止回流电流的功能。 电压跟随器的一端连接到电源电压，另一端连接到电容器。 恒压产生电路从电容器两端的电压产生恒定的电压。 开关电路连接在构成除了其第一级晶体管之外的电压跟随器的晶体管之一的电源电压和控制电极之间。 电压降检测电路检测电容器两端的电压下降到预定水平以下，并且检测到这种下降时接通开关电路。

公开(公告)号：US06476661B2

公开(公告)日：2002-11-05

申请号：US09817292

申请日：2001-03-27

申请人： Stepan Iliasevitch

发明人： Stepan Iliasevitch

IPC分类号： H03K1704

CPC分类号： G05F3/222

摘要： A pull-down circuit uses an npn transistor operating at close to saturation and the collector/emitter voltage is used as the pull-down voltage. To keep this within strict limits the npn transistor is connected in circuit with other transistors and resistors as well as a current source that generates a current proportional to absolute temperature. By selecting the values of the resistors and transistor parameters the collector/emitter voltage may be kept stable within a small range over wide temperature variation.

摘要翻译： 下拉电路使用工作在接近饱和的npn晶体管，集电极/发射极电压用作下拉电压。 为了将其保持在严格的限制范围内，npn晶体管与其他晶体管和电阻器以及产生与绝对温度成比例的电流的电流源连接在电路中。 通过选择电阻和晶体管参数的值，集电极/发射极电压可以在较宽的温度变化范围内保持在小范围内。

公开(公告)号：US06429720B1

公开(公告)日：2002-08-06

申请号：US09569544

申请日：2000-05-12

申请人： Barrie Gilbert

发明人： Barrie Gilbert

IPC分类号： G05F7556

CPC分类号： G01R19/02 ,  G05F3/222 ,  G05F3/265 ,  H03G1/0088

摘要： An RMS-DC converter provides extended dynamic range by driving a squaring cell with a variable gain amplifier. Temperature effects in the squaring cell can be cancelled by driving a second squaring cell with a reference signal and averaging the difference between the output signals from the two squaring cells. In a transmission system utilizing a power measurement system having two detector cells, square-law conformance errors in the detector cells can be cancelled by driving one of the detectors cells with a replica of the baseband modulation signal.

摘要翻译： RMS-DC转换器通过用可变增益放大器驱动平方单元来提供扩展的动态范围。 可以通过用参考信号驱动第二平方单元并平均来自两个平方单元的输出信号之间的差来抵消平方单元中的温度效应。 在利用具有两个检测器单元的功率测量系统的传输系统中，通过用基带调制信号的副本驱动检测器单元之一，可以消除检测器单元中的平方律一致性误差。

公开(公告)号：US06316924B1

公开(公告)日：2001-11-13

申请号：US09606895

申请日：2000-06-29

申请人： Michael A. Stapleton ,  Bernard W. Boland ,  Jeffery J. Olsen ,  John A. Dickerson

发明人： Michael A. Stapleton ,  Bernard W. Boland ,  Jeffery J. Olsen ,  John A. Dickerson

IPC分类号： G05F140

CPC分类号： G05F3/222

摘要： A system includes a first power supply line that is associated with a first voltage level and a second power supply line that is associated with a second voltage level. A power supply is coupled to the first and second power lines to establish a first voltage of the first power supply line near the first voltage level and a second voltage of the second power supply line near the second voltage level. The power supply has a response during a time period after the activation or deactivation of the power supply in which the power supply does not maintain a difference between the first and second voltages within a predefined range. The system includes a circuit that is coupled to the first and second power supply lines to maintain the difference between the first and second voltages within the predefined range during the time period.

摘要翻译： 系统包括与第一电压电平相关联的第一电源线和与第二电压电平相关联的第二电源线。 电源耦合到第一和第二电源线，以建立靠近第一电压电平的第一电源线的第一电压和靠近第二电压电平的第二电源线的第二电压。 电源在电源的激活或停用之后的时间段内具有响应，其中电源不将预定范围内的第一和第二电压之间的差保持不变。 该系统包括耦合到第一和第二电源线的电路，以在该时间段内将第一和第二电压之间的差值保持在预定范围内。

公开(公告)号：US06271716B1

公开(公告)日：2001-08-07

申请号：US09220709

申请日：1998-12-21

申请人： Mehrdad Nayebi ,  Stephen D. Edwards ,  Phil Shapiro

发明人： Mehrdad Nayebi ,  Stephen D. Edwards ,  Phil Shapiro

IPC分类号： G05F110

CPC分类号： H03L7/0895 ,  G05F3/222 ,  H03L7/0896

摘要： A current source circuit for providing a stable current into a filter element of a phase-lock-loop circuit of a clock generator. The current source circuit comprises a first resistor coupled to a voltage supply. The emitter of a first transistor is coupled to the first resistor; the base is coupled to a bias voltage, and the collector is coupled to a capacitor. The capacitor forms part of the filter of the phase-lock-loop circuit. Current flows from the voltage supply through the first resistor and first transistor into the capacitor. A second transistor has a collector coupled to the capacitor; a base; and an emitter coupled to ground via a second resistor. The second transistor and resistor causes a fixed amount of current to be sinked from the capacitor. Leakage current flowing out of the capacitor due to the inherent Rcb impedance associated with the second transistor is directed to a path provided by a third transistor. The third transistor has an emitter coupled to the base of the second transistor and a collector coupled to the emitter of the first transistor. The third transistor directs the Rcb leakage current inherent to the second transistor back into the capacitor. Thereby, the Rcb leakage current flowing out from the capacitor is canceled by the current flowing back into the capacitor via the third and first transistors. This produces a more stable current, and hence, more stable voltage being maintained by the capacitor. A more stable voltage means that the capacitor can be made smaller. In turn, this enables the phase-lock-loop to be fabricated on-chip with the rest of the clock generator, thereby minimizing its susceptibility to external noise and interferences. Furthermore, a more stable voltage across the filter element of the phase-lock-loop reduces unwanted jitter in the clock signal.

摘要翻译： 一种用于向时钟发生器的锁相环电路的滤波器元件提供稳定电流的电流源电路。 电流源电路包括耦合到电压源的第一电阻器。 第一晶体管的发射极耦合到第一电阻器; 基极耦合到偏置电压，并且集电极耦合到电容器。 电容器形成锁相环电路滤波器的一部分。 电流从电源通过第一电阻和第一晶体管流入电容器。 第二晶体管具有耦合到电容器的集电极; 一个基地 以及通过第二电阻器耦合到地的发射极。 第二晶体管和电阻使固定电流从电容器吸收。 由于与第二晶体管相关联的固有Rcb阻抗而流出电容器的泄漏电流被引导到由第三晶体管提供的路径。 第三晶体管具有耦合到第二晶体管的基极的发射极和耦合到第一晶体管的发射极的集电极。 第三晶体管将第二晶体管固有的Rcb漏电流引导回电容器。 因此，从电容器流出的Rcb漏电流通过经由第三和第一晶体管流回电容器的电流而被抵消。 这产生更稳定的电流，因此由电容器维持更稳定的电压。 更稳定的电压意味着电容器可以做得更小。 反过来，这使得锁相环能够与时钟发生器的其余部分片上制造，从而最小化其对外部噪声和干扰的敏感性。 此外，锁相环路的滤波器元件两端的更稳定的电压降低了时钟信号中的不必要的抖动。