公开(公告)号：US06351111B1

公开(公告)日：2002-02-26

申请号：US09834421

申请日：2001-04-13

申请人： J. Marcos Laraia

发明人： J. Marcos Laraia

IPC分类号： G05F326

CPC分类号： G05F3/267 ,  G05F3/225 ,  G05F3/245 ,  Y10S323/907

摘要： A current reference circuit provides a reference current that has a controlled temperature coefficient and is relatively stable with supply voltage fluctuations. The reference leg includes a series of MOS transistors including at least one PMOS transistor that is electrically closer in the series to a high voltage source, at least one NMOS transistor that is electrically closer in the series to the low voltage source. The series composite resistor comprises at least two resistors coupled in series within the current path. The size of the resistors may be designed so as to lower the temperature dependency of the circuit. A bipolar transistor is also coupled in the reference leg. The mirror leg is similar to the reference leg except that no series resistor is provided, and the emitter area of the bipolar resistor in the reference leg is larger than the emitter area of the bipolar transistor in the mirror leg.

摘要翻译： 电流参考电路提供具有受控温度系数并且在电源电压波动时相对稳定的参考电流。 参考支路包括一系列MOS晶体管，其包括至少一个PMOS晶体管，其至少一个串联连接到高电压源的PMOS晶体管，至少一个与串联连接到低电压源的NMOS晶体管。 串联复合电阻器包括在电流路径内串联耦合的至少两个电阻器。 可以设计电阻器的尺寸以降低电路的温度依赖性。 双极晶体管也耦合在参考支路中。 除了不提供串联电阻器之外，镜腿与参考腿相似，参考腿中的双极性电阻器的发射极面积大于镜腿中的双极晶体管的发射极面积。

公开(公告)号：US06194957B1

公开(公告)日：2001-02-27

申请号：US09416464

申请日：1999-10-12

申请人： Martin A. Fryer ,  Dominic Charles Royce

发明人： Martin A. Fryer ,  Dominic Charles Royce

IPC分类号： G05F326

CPC分类号： H03F1/0244 ,  G05F3/262

摘要： A current mirror comprises reference and output devices (21, 22), and an amplifier (23) for sensing the drain voltages of said devices (21, 22) and applying a control signal to their gates via a normally-closed switch (33). The output current of a circuit (not shown) feeding the reference device (21) may change if the voltage across it becomes too small. The amplifier (23) attempts to force almost identical voltages on the output electrodes of the reference and output devices. If the output voltage (at OUT) of the current mirror approaches an extreme of the output voltage range, the current feeding the reference device may change, and the output current will be incorrect. Also, if at start up the output voltage approaches this extreme, the circuit may “lock up”. Comparator 31, in response to the output voltage reaching a predetermined level, opens switch (33) and closes a normally-open switch (32), whereby the circuit reverts to the normal diode-connected mode, keeping the drain of the reference device (21) at a suitable voltage.

摘要翻译： 电流镜包括参考和输出装置（21,22）和用于感测所述装置（21,22）的漏极电压并且通过常闭开关（33）向它们的栅极施加控制信号的放大器（23） 。 馈送参考装置（21）的电路（未示出）的输出电流可以改变，如果其上的电压变得太小。 放大器（23）试图在参考和输出装置的输出电极上强制几乎相同的电压。 如果电流镜的输出电压（OUT）接近输出电压范围的极值，则馈送参考装置的电流可能会改变，输出电流将不正确。 另外，如果启动时输出电压接近这个极限，电路可能会“锁定”。 比较器31响应于输出电压达到预定电平，打开开关33并闭合常开开关32，由此电路恢复到正常二极管连接模式，保持参考装置的漏极（ 21）以合适的电压。

公开(公告)号：US06759891B2

公开(公告)日：2004-07-06

申请号：US10133761

申请日：2002-04-29

申请人： Robert N. Dotson

发明人： Robert N. Dotson

IPC分类号： G05F326

CPC分类号： G01K7/01 ,  G01K3/005

摘要： An integrated circuit (10) includes a thermal shutdown circuit that incorporates hysteresis for shutting down a functional circuit (13) when its temperature exceeds a predefined value. First and second current sources (18, 17) respectively produce first and second reference currents (IREF1, IREF2) representative of first and second die temperatures of the integrated circuit. A current mirror (14) has an input (19) for summing the first and second reference currents and an output (15) for providing a mirror current (IMIRROR). A detection circuit (12) has an output coupled to the output of the current mirror for sinking the mirror current to produce a detection signal (VDET) as a function of the first and second die temperatures.

摘要翻译： 集成电路（10）包括热关断电路，其在其功能电路（13）的温度超过预定值时包含用于关闭功能电路（13）的滞后。 第一和第二电流源（18,17）分别产生表示集成电路的第一和第二管芯温度的第一和第二参考电流（IREF1，IREF2）。 电流镜（14）具有用于对第一和第二参考电流求和的输入端（19）和用于提供反射镜电流（IMIRROR）的输出端（15）。 检测电路（12）具有耦合到电流镜的输出的输出，用于吸收反射镜电流，以产生作为第一和第二裸片温度的函数的检测信号（VDET）。

公开(公告)号：US06420911B1

公开(公告)日：2002-07-16

申请号：US08705569

申请日：1996-08-29

申请人： Leonardus F. P. Warmerdam ,  Hendrik Boezen

发明人： Leonardus F. P. Warmerdam ,  Hendrik Boezen

IPC分类号： G05F326

CPC分类号： G05F1/561

摘要： A ballast circuit for operating a lamp provided with a voltage-current converter, the ballast circuit having a differential amplifier provided with a first input terminal for connection to a reference voltage source for generating a reference voltage, a second input terminal for connection of a reference resistor, and an output. A first current generator supplies a first current to the reference resistor. A current amplifier generates a second current and is provided with an input coupled to the output of the differential amplifier. The differential amplifier is provided with a low-pass filter. The current amplifier on the one hand and the current generator and the reference resistor on the other hand exclusively comprise mutually separate components. The ballast circuit is in addition provided with a current control circuit coupled to the current amplifier and to the current generator for influencing the first current dependent upon the second current. As a result, an interference signal present at the second input terminal causes no appreciable interference in the second current.

摘要翻译： 一种镇流器电路，用于操作具有电压 - 电流转换器的灯，所述镇流器电路具有差分放大器，该差分放大器设置有用于连接到用于产生参考电压的参考电压源的第一输入端子，用于连接参考电压的第二输入端子 电阻和输出。 第一电流发生器向参考电阻器提供第一电流。 电流放大器产生第二电流并且被提供有耦合到差分放大器的输出的输入。 差分放大器配有低通滤波器。 另一方面，电流放大器和电流发生器和参考电阻器独占地包括相互分离的部件。 镇流器电路还具有耦合到电流放大器和电流发生器的电流控制电路，用于影响取决于第二电流的第一电流。 结果，存在于第二输入端子处的干扰信号在第二电流中不产生明显的干扰。

公开(公告)号：US06459249B2

公开(公告)日：2002-10-01

申请号：US09738641

申请日：2000-12-22

申请人： Marten Swart ,  Ekkehart-Peter Wagner ,  Christian Zelger

发明人： Marten Swart ,  Ekkehart-Peter Wagner ,  Christian Zelger

IPC分类号： G05F326

CPC分类号： G06F1/24 ,  G06F1/30 ,  Y10S323/901

摘要： A reset circuit for deactivating a circuit configuration, which is fed by a supply voltage, in the case of an undervoltage supply. In this case, active components 1,2 (FIG. 1); or 3,2 (FIG. 3) are provided and their forward paths are connected in series between the supply voltage Uv and ground reference potential. The active components are fed directly or indirectly by a current mirror circuit 9 from a respective current source 10, 11. A reset signal Ureset (active=low signal) being present at the junction point 5 of the active components, where the junction point 5 is connected to ground reference potential via a resistor Rdown.

摘要翻译： 一种用于在欠电压供电的情况下停用由电源电压供电的电路配置的复位电路。 在这种情况下，有源元件1,2（图1）; 或3,2（图3），并且它们的前向通路串联连接在电源电压Uv和接地参考电位之间。 有源分量由相应的电流源10,11由电流镜电路9直接或间接馈送。复位信号Ureset（有效=低信号）存在于有源部件的接合点5处，其中连接点5 通过电阻Rdown连接到接地参考电位。

公开(公告)号：US06215291B1

公开(公告)日：2001-04-10

申请号：US09550850

申请日：2000-04-17

申请人： Mark J. Mercer

发明人： Mark J. Mercer

IPC分类号： G05F326

CPC分类号： H02J7/0057 ,  H02J7/0054

摘要： A control circuit is provided to minimize the charging cycle time of a battery charging system by maximizing the length of time that high constant charging current is applied to a discharged battery. The control circuit includes a constant current (CC) error amplifier, a constant voltage (CV) error amplifier, an output amplifier, and two pole-splitting compensation networks. The control circuit works in conjunction with a power source to charge a secondary battery. The pole-splitting compensation networks allow the CC, CV, and output amplifiers to be configured for high gain, without sacrificing output stability. The control circuit provides a sharp transition between the CC mode and CV mode of operation. In the CC mode, fast bulk battery charging is provided. In the CV mode, the control circuit initially provides a “top-off” charge to the battery and subsequently safely maintains the battery at its fully charged state. By using bi-directional transconductance error amplifiers as the CC and CV error amplifiers, the control circuit can be optimized for pole-splitting compensation. The control circuit can be operated with a constant internal reference voltage or a variable internal reference voltage. When a variable internal reference voltage is applied, the charging cycle time of the control circuit is further minimized through a charge current compensation technique.

摘要翻译： 提供一种控制电路，通过最大限度地将放电电池施加高恒定充电电流的时间长度来最小化电池充电系统的充电周期时间。 控制电路包括恒定电流（CC）误差放大器，恒压（CV）误差放大器，输出放大器和两个分极补偿网络。 控制电路与电源一起工作以对二次电池充电。 极分解补偿网络允许CC，CV和输出放大器配置为高增益，而不会牺牲输出稳定性。 控制电路在CC模式和CV操作模式之间提供了清晰的转换。 在CC模式下，提供快速批量电池充电。 在CV模式中，控制电路最初为电池提供“顶”电荷，并随后安全地将电池维持在完全充电状态。 通过使用双向跨导误差放大器作为CC和CV误差放大器，可以优化控制电路用于极分解补偿。 控制电路可以使用恒定的内部参考电压或可变的内部参考电压进行工作。 当施加可变的内部参考电压时，通过充电电流补偿技术进一步使控制电路的充电周期时间最小化。

公开(公告)号：US06433556B1

公开(公告)日：2002-08-13

申请号：US09655892

申请日：2000-09-06

申请人： Gregory J. Smith

发明人： Gregory J. Smith

IPC分类号： G05F326

CPC分类号： G05F3/245 ,  Y10S323/907

摘要： A circuit generating a ramp signal between two temperature values includes two pairs of transistors in current/mirror configurations and a signal converter. The transistors and signal converter are constructed and connected such that below a first temperature value a first constant signal is outputted. Between the first temperature value and a second temperature value, an increasing or decreasing ramp signal is outputted. Above the second temperature value, a second constant signal is outputted. The temperature values between which the ramp signal operates and the rate of increase or decrease of the ramp signal are selectable.

摘要翻译： 在两个温度值之间产生斜坡信号的电路包括电流/反射镜配置中的两对晶体管和信号转换器。 晶体管和信号转换器被构造和连接，使得在第一温度值以下输出第一恒定信号。 在第一温度值和第二温度值之间，输出增减斜坡信号。 高于第二温度值时，输出第二恒定信号。 斜坡信号工作的温度值和斜坡信号的增加或减小速率是可选择的。

公开(公告)号：US06271710B1

公开(公告)日：2001-08-07

申请号：US08659979

申请日：1996-06-07

申请人： Tsukasa Ooishi

发明人： Tsukasa Ooishi

IPC分类号： G05F326

CPC分类号： G05F3/262 ,  G05F3/245

摘要： Constant current is generated by a constant current generating circuit. This constant current is divided by a current dividing circuit, and current having temperature dependency is generated by a temperature dependent circuit based on the constant current. This current and the divided current are added in an adding circuit, and driving current is supplied to a ring oscillator. In the ring oscillator, one gate input of each of the odd number of stages of inverters is connected to an output of an inverter in the previous stage, and the other gate input thereof is connected to an output of an inverter in the second previous stage.

摘要翻译： 恒流由恒流产生电路产生。 该恒定电流由分流电路分压，具有温度依赖性的电流由基于恒定电流的与温度相关的电路产生。 该电流和分压电流加在加法电路中，驱动电流被提供给环形振荡器。 在环形振荡器中，奇数级反相器中的每一级的一个栅极输入连接到前一级的反相器的输出，而另一个栅极输入连接到第二级的反相器的输出 。

公开(公告)号：US06731159B2

公开(公告)日：2004-05-04

申请号：US10299159

申请日：2002-11-18

申请人： Francois Van Zanten ,  Marc Sabut ,  Raymond Ribas

发明人： Francois Van Zanten ,  Marc Sabut ,  Raymond Ribas

IPC分类号： G05F326

CPC分类号： G05F3/262

摘要： A mirroring circuit operating at high frequencies is provided. The mirroring circuit includes a first branch having a first transistor in series with a first resistor, a second branch having a second transistor in series with a second resistor, and a servo circuit for controlling current flowing in the first branch and the second branch. The servo circuit includes a third transistor configured as a diode, a source of the third transistor coupled to a source of the first transistor, a fourth transistor configured as a shift lever, a source of the fourth transistor coupled to ground via a third resistor, a fifth transistor configured as a diode, a source of the fifth transistor coupled to a source of the second transistor, and a sixth transistor configured as a shift lever, a source of the sixth transistor coupled to ground via the third resistor.

摘要翻译： 提供以高频操作的镜像电路。 镜像电路包括具有与第一电阻器串联的第一晶体管的第一分支，具有与第二电阻器串联的第二晶体管的第二分支和用于控制在第一分支和第二分支中流动的电流的伺服电路。 伺服电路包括被配置为二极管的第三晶体管，耦合到第一晶体管的源极的第三晶体管的源极，配置为变换杆的第四晶体管，经由第三电阻器耦合到地的第四晶体管的源极， 配置为二极管的第五晶体管，耦合到第二晶体管的源极的第五晶体管的源极和被配置为变换杆的第六晶体管，第六晶体管的源极经由第三电阻器耦合到地。

公开(公告)号：USRE38250E1

公开(公告)日：2003-09-16

申请号：US09684192

申请日：2000-10-06

申请人： William Carl Slemmer

发明人： William Carl Slemmer

IPC分类号： G05F326

CPC分类号： G11C5/143 ,  G05F3/267 ,  G05F3/30

摘要： According to the present invention, a circuit, utilizing a minimum number of bipolar devices and current mirror scaling devices, generates a bandgap reference voltage. The bandgap voltage generated by the bandgap reference circuit is a function of a plurality of sized current mirror devices, the ratio of a first resistor to a second resistor, and the number and relative sizing of bipolar junction transistors used. The bandgap reference circuit generates a bandgap reference voltage which is suitable for use in a variety of integrated circuit devices, such as a zero power static random access memory (SRAM). If used in a zero power SRAM application, the bandgap reference voltage may be utilized to determine when the primary power source of the zero power SRAM has fallen below a predetermined voltage level and a secondary power source must be substituted for the primary power source.