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1.发明授权Circuit for detecting digital signals, particularly for a system with an ASI field bus 有权用于检测数字信号的电路，特别是用于具有ASI现场总线的系统公开(公告)号：US06690755B1
公开(公告)日：2004-02-10
申请号：US09436915
申请日：1999-11-09
IPC分类号： H04B110
CPC分类号： H02J13/0003
摘要： A circuit for detecting signals present on a bifilar voltage-supply and signal-transmission line, in which the signals are constituted by positive and negative variations of the supply potential of at least one of the wires of the line, the circuit including a low-pass filter connected to the two wires of the line in order to supply, at an output terminal of the filter, a constant reference potential substantially equal to the supply potential of a preselected one of the two wires, a first threshold comparator having a reference input terminal and a threshold input terminal connected, respectively, to the output terminal of the filter and to the preselected wire of the two wires, and a second threshold comparator having a reference input terminal and a threshold input terminal connected, respectively, to the preselected wire of the two wires and to the output terminal of the filter. The circuit is relatively simple, does not require synchronization signals, and can be formed as an integrated circuit, taking up a limited area.
摘要翻译： 一种电路，用于检测出现在双向电压和信号传输线路上的信号，其中信号由线路的至少一条线路的电源电位的正负变化构成，该电路包括低通滤波器， 连接到线路的两条导线，以便在滤波器的输出端处提供基本上等于两条线中的预选的电源的电位的恒定参考电位;具有参考输入的第一阈值比较器 端子和阈值输入端子分别连接到滤波器的输出端子和两条导线的预选导线，以及第二阈值比较器，其具有分别连接到预选导线的参考输入端子和阈值输入端子 的两根线和滤波器的输出端。 电路比较简单，不需要同步信号，可以形成为集成电路，占用有限的区域。
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2.发明授权Method and apparatus for protecting an integrated circuit from current overload 失效用于保护集成电路免受电流过载的方法和装置
公开(公告)号：US5710690A
公开(公告)日：1998-01-20
申请号：US488885
申请日：1995-06-09
IPC分类号： H02H3/08 , H03K17/082 , H03K17/284 , H02H3/18
CPC分类号： H03K17/284 , H03K17/0822
摘要： A non-dissipative device for protecting an integrated circuit having multiple independent channels against overloading. The non-dissipative device includes an input terminal and an output terminal having an integrated switch connected therebetween which consists of an input portion, a logic gate with two inputs a control portion, and an output portion, all connected in series with one another. The device further includes a generating circuit for generating the on-times and off-times of the integrated switch, the generating circuit is connected between an output of the output portion and an input of the logic gate.
摘要翻译： 一种用于保护具有多个独立通道的集成电路以防超载的非耗散装置。 非耗散装置包括输入端子和输出端子，其具有连接在其间的集成开关，其由输入部分，具有两个输入的控制部分的逻辑门和输出部分组成，所述输出部分彼此串联连接。 该装置还包括用于产生集成开关的导通和关断时间的发生电路，该发生电路连接在输出部分的输出端和逻辑门的输入端之间。
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公开(公告)号：US5656969A
公开(公告)日：1997-08-12
申请号：US449855
申请日：1995-05-24
IPC分类号： H03K17/567 , H03G1/00 , H03K17/00 , H03K17/042 , H03K17/16 , H03K17/687
CPC分类号： H03G1/0029 , H03G1/0023 , H03K17/04206 , H03K17/166 , H03K2217/0036
摘要： Power consumption by the driving circuitry of an output stage, employing a slew-rate controlling operational amplifier, is reduced by modulating the level of the current output by the operational amplifier in function of the working conditions of the output stage. Switching delay may also be effectively reduced. An auxiliary current generator forces an additional current through the conducting one of the pair of input transistors of the operational amplifier only during initial and final phases of a transition, essentially when the slew rate control loop ceases to be effective. The boosting of the bias current through the conducting input transistor is determined by the degree of unbalance of the differential input stage of the operational amplifier, without the use of dissipative sensing elements.
摘要翻译： 利用输出级的工作条件，通过调制运算放大器的电流输出电平，降低采用摆率控制运算放大器的输出级的驱动电路的功耗。 切换延迟也可以有效降低。 辅助电流发生器仅在转换的初始和最后阶段迫使额外的电流通过运算放大器的一对输入晶体管中的导通一个电流，基本上当压摆率控制回路不再有效时。 通过导通输入晶体管的偏置电流的升压由运算放大器的差分输入级的不平衡度决定，而不使用耗散感测元件。
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公开(公告)号：US07619598B2
公开(公告)日：2009-11-17
申请号：US11546516
申请日：2006-10-10
CPC分类号： G09G3/3216 , G09G3/22 , G09G3/3283 , G09G2320/029 , G09G2320/041 , G09G2320/043 , G09G2330/021 , G09G2330/028
摘要： An OLED (organic light-emitting diode) passive-matrix display includes a display portion and a driver portion. The display portion includes a matrix of OLEDs for displaying information. The driver portion includes a monitor circuit and a voltage adjusting circuit. The voltage adjusting circuit has a power-up portion that generates a supply voltage based on a reference voltage. In response to an indication to switch modes, the voltage adjusting circuit switches to an operational mode wherein the supply voltage is generated based on the maximum voltage drop read across the OLEDs.
摘要翻译： OLED（有机发光二极管）无源矩阵显示器包括显示部分和驱动器部分。 显示部分包括用于显示信息的OLED矩阵。 驱动器部分包括监视器电路和电压调节电路。 电压调节电路具有基于参考电压产生电源电压的上电部分。 响应于开关模式的指示，电压调节电路切换到操作模式，其中基于通过OLED读取的最大电压降产生电源电压。
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公开(公告)号：US20070171155A1
公开(公告)日：2007-07-26
申请号：US11546516
申请日：2006-10-10
IPC分类号： G09G3/30
CPC分类号： G09G3/3216 , G09G3/22 , G09G3/3283 , G09G2320/029 , G09G2320/041 , G09G2320/043 , G09G2330/021 , G09G2330/028
摘要： An OLED (organic light-emitting diode) passive-matrix display includes a display portion and a driver portion. The display portion includes a matrix of OLEDs for displaying information. The driver portion includes a monitor circuit and a voltage adjusting circuit. The voltage adjusting circuit has a power-up portion that generates a supply voltage based on a reference voltage. In response to an indication to switch modes, the voltage adjusting circuit switches to an operational mode wherein the supply voltage is generated based on the maximum voltage drop read across the OLEDs.
摘要翻译： OLED（有机发光二极管）无源矩阵显示器包括显示部分和驱动器部分。 显示部分包括用于显示信息的OLED矩阵。 驱动器部分包括监视器电路和电压调节电路。 电压调节电路具有基于参考电压产生电源电压的上电部分。 响应于开关模式的指示，电压调节电路切换到操作模式，其中基于通过OLED读取的最大电压降产生电源电压。
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公开(公告)号：US6130527A
公开(公告)日：2000-10-10
申请号：US378171
申请日：1999-08-20
CPC分类号： G05F3/20
摘要： A voltage regulator providing smooth variation of an absorbed current having a first capacitor parallel-connected to a load, which is in turn connected to a supply voltage; a transconductor coupled between the supply voltage and the load and whose output voltage supplies the load; a differential amplifier coupled between the output of the transconductor and the supply voltage, and further coupled to the input of the transconductor, a second capacitor coupled between the supply voltage and the input of the transconductor; and a pair of diodes coupled between the output of the transconductor and the first capacitor and configured to introduce a zero in the transfer function of the voltage regulator that is suitable to compensate for a pole generated by the first capacitor.
摘要翻译： 电压调节器提供吸收电流的平滑变化，其具有并联到负载的第一电容器，负载又连接到电源电压; 耦合在电源电压和负载之间并且其输出电压提供负载的跨导体; 耦合在所述跨导体的输出和所述电源电压之间并且进一步耦合到所述跨导体的输入的差分放大器，耦合在所述电源电压和所述跨导体的输入之间的第二电容器; 以及耦合在跨导体的输出和第一电容器之间的一对二极管，其被配置为在适于补偿由第一电容器产生的极的电压调节器的传递函数中引入零。
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公开(公告)号：US06791212B2
公开(公告)日：2004-09-14
申请号：US10260717
申请日：2002-09-27
IPC分类号： H01H3110
CPC分类号： H02M3/073 , G09G3/36 , G09G3/3696 , G09G2330/02 , G09G2330/021 , H02M2001/0022 , Y10T307/747
摘要： A regulated voltage-boosting device provides a charge-pump circuit, which has an input terminal receiving a first voltage and an output terminal supplying a second voltage higher than the first voltage. The regulated voltage-boosting device provides a plurality of voltage-boosting stages that can be selectively activated and deactivated. The regulated voltage-boosting device provides an automatic-selection circuit for activating a number of voltage-boosting stages which is correlated to the first voltage and to the second voltage.
摘要翻译： 稳压升压装置提供电荷泵电路，其具有接收第一电压的输入端和提供高于第一电压的第二电压的输出端。 调节的升压装置提供可以选择性地激活和去激活的多个升压级。 调节升压装置提供一个自动选择电路，用于激活与第一电压和第二电压相关的多个升压级。
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公开(公告)号：US06487059B2
公开(公告)日：2002-11-26
申请号：US09919343
申请日：2001-07-30
申请人： Gregorio Bontempo , Claudio Adragna , Mauro Fagnani , Albino Pidutti , Francesco Pulvirenti , Roberto Quaglino , Giuseppe Gattavari
发明人： Gregorio Bontempo , Claudio Adragna , Mauro Fagnani , Albino Pidutti , Francesco Pulvirenti , Roberto Quaglino , Giuseppe Gattavari
IPC分类号： H02H320
CPC分类号： H02M3/28 , H02M1/32 , H02M3/33523
摘要： The power supply device includes a DC-DC converter circuit having a power switch and a driving stage. The driving stage has a compensation terminal on which a compensation voltage is present, and which receives a biasing current. The driving stage includes a control circuit having an output terminal connected to a control terminal of the power switch and disconnection-detecting circuitry connected to the compensation terminal and generating a signal for permanent turning-off of the power switch when the biasing current drops below a current-threshold value. The driving stage moreover includes over-voltage detecting circuitry connected to the compensation terminal and generating a signal for temporary turning-off of the power switch when the compensation voltage exceeds a voltage-threshold value.
摘要翻译： 电源装置包括具有电源开关和驱动级的DC-DC转换器电路。 驱动级具有补偿端子，其上存在补偿电压，并且接收偏置电流。 驱动级包括控制电路，该控制电路具有连接到电源开关的控制端子的输出端子和连接到补偿端子的断开检测电路，并且当偏置电流下降至低于该值时产生用于永久关断电源开关的信号 电流阈值。 此外，驱动级还包括连接到补偿端子的过电压检测电路，并且当补偿电压超过电压阈值时，产生暂时关断电源开关的信号。
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公开(公告)号：US5831466A
公开(公告)日：1998-11-03
申请号：US777182
申请日：1996-12-27
IPC分类号： H03K17/08 , H03K17/082 , H02H1/00
CPC分类号： H03K17/0822 , H03K2017/0806 , H03K2217/0063 , H03K2217/0072
摘要： The present invention is aimed at providing a method and a circuit for protecting the output stage of a power actuator against voltage transients of the surge type. In particular, it provides protection against voltage surge transients of the kind described by International Standard IEC 801-5, for a power transistor contained in the output stage of the actuator. The method of this invention provides for: the utilization of the power transistor (PW) intrinsic diode (DP) for dumping the transient energy to one of the supply generator terminals during a positive transient; and the utilization of the power transistor (PW) restoration feature to the on state for dumping the energy thereinto during a negative transient, while simultaneously inhibiting the current limiting function. The power transistor (PW) is turned on again, and the current limiting circuit (4) inhibited, by the following steps: a) generating an electric signal which is substantially proportional to the voltage appearing at the output terminal (OUT) of the actuator; b) driving the control terminal (G) of the power transistor (PW) by means of said electric signal, and causing said transistor to conduct, while simultaneously disabling the current limiting circuit (4) when the output voltage exceeds a predetermined threshold; and c) allowing the transient energy to be dissipated to the power transistor (PW).
摘要翻译： 本发明的目的在于提供一种用于保护功率执行器的输出级的方法和电路，以防止浪涌型的电压瞬变。 特别地，它提供了针对包含在执行器的输出级中的功率晶体管的国际标准IEC 801-5所述类型的电压浪涌瞬变的保护。 本发明的方法提供：功率晶体管（PW）本征二极管（DP）用于在正瞬变期间将瞬态能量倾倒到一个供电发生器端子; 以及在负瞬态期间将功率晶体管（PW）恢复特性应用于导通状态以将能量倾倒在其中，同时抑制电流限制功能。 功率晶体管（PW）再次导通，并且限流电路（4）通过以下步骤来禁止：a）产生与执行器的输出端（OUT）出现的电压基本成正比的电信号 ; b）通过所述电信号驱动功率晶体管（PW）的控制端（G），并使所述晶体管导通，同时在所述输出电压超过预定阈值时使所述限流电路（4）同时禁用; 和c）允许瞬态能量被耗散到功率晶体管（PW）。
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10.发明授权Protection circuit and method for power transistors, voltage regulator using the same 失效功率晶体管的保护电路和方法，使用相同的电压调节器
公开(公告)号：US5789971A
公开(公告)日：1998-08-04
申请号：US560001
申请日：1995-11-17
CPC分类号： G05F1/573
摘要： A protection circuit for at least one power transistor which has at least one control terminal and two main conduction terminals defining a main conduction path includes a first detection means designed to generate a first electrical signal approximately proportional to current flowing in the main conduction path. Second detection means are designed to generate a second electrical signal approximately proportional to voltage across the main conduction path. Multiplying means receive at input the first and second signals and are designed to generate an electrical product signal substantially corresponding to the product of at least the latter. A generator generates an electrical reference signal, and operational amplifier means receive at input the product signal and the reference signal and are designed to generate an electrical difference signal substantially corresponding to their difference. Control means are designed to drive the control terminal on the basis of the difference signal so that the product signal is not greater than the reference signal.
摘要翻译： 用于至少一个功率晶体管的保护电路，其具有至少一个控制端子和限定主导电路径的两个主导电端子，包括设计成产生与在主导通路径中流动的电流近似成比例的第一电信号的第一检测装置。 第二检测装置被设计成产生与主传导路径上的电压近似成比例的第二电信号。 乘法装置在输入端处接收第一和第二信号，并被设计成产生基本上对应于至少后者的乘积的电产品信号。 发生器产生电参考信号，并且运算放大器装置在输入端接收产品信号和参考信号，并且被设计成产生基本上与其差异相对应的电差信号。 控制装置被设计成基于差分信号驱动控制终端，使得乘积信号不大于参考信号。
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