公开(公告)号：US6040736A

公开(公告)日：2000-03-21

申请号：US984959

申请日：1997-12-04

申请人： Andrea Milanesi ,  Vanni Poletto ,  Alberto Poma ,  Marco Morelli

发明人： Andrea Milanesi ,  Vanni Poletto ,  Alberto Poma ,  Marco Morelli

IPC分类号： G05F1/575 ,  G05F1/10

CPC分类号： G05F1/575

摘要： A voltage-regulator circuit with a low voltage drop uses a DMOS power transistor driven by a charge pump. The control circuit includes two feedback loops: a first feedback loop having a high gain and accuracy but low response speed, and a second feedback loop having a wide passband and fast response speed, but low gain.

摘要翻译： 具有低压降的电压调节器电路使用由电荷泵驱动的DMOS功率晶体管。 控制电路包括两个反馈回路：具有高增益和精度但低响应速度的第一反馈回路，以及具有宽通带和快速响应速度但低增益的第二反馈回路。

公开(公告)号：US5920255A

公开(公告)日：1999-07-06

申请号：US902558

申请日：1997-07-29

申请人： Vanni Poletto ,  Alberto Poma ,  Marco Morelli

发明人： Vanni Poletto ,  Alberto Poma ,  Marco Morelli

IPC分类号： G01F23/00 ,  G01F23/30 ,  B60Q1/00

CPC分类号： G01F23/0061 ,  G01F23/30

摘要： The electronic interface circuit can perform ratiometric processing and driving of a signal generated by a fuel-level detector of a vehicle. The circuit uses a current mirror configured so as to send one half of the output current to the input resistance and one half of the output current to earth. The current mirror is controlled by a voltage taken from the input resistance and by a voltage taken from a resistive divider, the latter voltage having been filtered by a low-pass filter, so as to achieve ratiometric processing of the input signal.

摘要翻译： 电子接口电路可以执行比例计算处理和驱动由车辆的燃料液位检测器产生的信号。 该电路使用电流镜，配置为将输出电流的一半发送到输入电阻，输出电流的一半输出到地。 电流镜由从输入电阻取得的电压和从电阻分压器获取的电压来控制，后一电压已被低通滤波器滤波，以便实现输入信号的比例处理。

公开(公告)号：US5912617A

公开(公告)日：1999-06-15

申请号：US929810

申请日：1997-09-15

申请人： Vanni Poletto ,  Alberto Poma ,  Marco Morelli

发明人： Vanni Poletto ,  Alberto Poma ,  Marco Morelli

IPC分类号： G01F23/00 ,  H03K17/945 ,  B60Q1/00

CPC分类号： H03K17/945 ,  G01F23/0069 ,  G01F23/0084

摘要： A circuit for controlling the reserve lamp of a vehicle's fuel level indicator instrument. The circuit uses a switch controlled by an extremely asymmetric clock signal periodically to switch, for a very short time, the signal provided by the level sensor coupled to a comparator operable to compare this signal with a threshold value for the purpose of determining the state of the reserve lamp.

摘要翻译： 一种用于控制车辆燃料液位指示器的储备灯的电路。 该电路使用由非常不对称的时钟信号控制的开关周期性地在非常短的时间内切换耦合到比较器的电平传感器提供的信号，该比较器可用于将该信号与阈值进行比较，以便确定 备用灯。

公开(公告)号：US5404053A

公开(公告)日：1995-04-04

申请号：US75056

申请日：1993-06-09

申请人： Alberto Poma ,  Vanni Poletto ,  Marco Morelli

发明人： Alberto Poma ,  Vanni Poletto ,  Marco Morelli

IPC分类号： H01L27/06 ,  H03F1/52 ,  H03K17/06 ,  H03K17/082 ,  H03K17/60 ,  H03K3/26

CPC分类号： H03K17/0822 ,  H03F1/523 ,  H03K17/063

摘要： An improved circuit for controlling the maximum current in a MOS power transistor, in which resistor is in series with the drain-source path of the MOS power transistor. The supply terminal of a transconductance operational amplifier is connected to the output of a voltage-raising or charge pump circuit which can output a voltage higher than that of the voltage supply to which the drain of the MOS transistor is connected. The inputs of the amplifier are connected to the resistor and its output is connected to the gate of the MOS transistor so that, in operation, the maximum current flowing through the power transistor is limited to a value proportional to a reference voltage.

摘要翻译： 一种用于控制MOS功率晶体管中的最大电流的改进电路，其中电阻器与MOS功率晶体管的漏极 - 源极路径串联。 跨导运算放大器的供电端子连接到升压或电荷泵电路的输出，该电压可以输出比MOS晶体管的漏极连接的电压高的电压。 放大器的输入连接到电阻器，其输出端连接到MOS晶体管的栅极，使得在工作中流过功率晶体管的最大电流被限制为与参考电压成比例的值。

公开(公告)号：US5309347A

公开(公告)日：1994-05-03

申请号：US947105

申请日：1992-09-18

申请人： Alberto Poma ,  Vanni Poletto ,  Marco Morelli

发明人： Alberto Poma ,  Vanni Poletto ,  Marco Morelli

IPC分类号： H03K17/08 ,  H02M1/00 ,  H02M1/38 ,  H03K17/082 ,  H03K17/66 ,  H02M3/155

CPC分类号： H02M1/38 ,  H03K17/0826 ,  H03K17/663

摘要： An H-bridge circuit which includes four power transistors (an npn pull-down and a pnp pull-up for each of the output terminals). Two control circuits are connected to drive these transistors in a complementary crossover configuration, so that each control circuit can turn on the pull-up transistor on one side of the load and the pull-down transistor on the opposite side of the load. Each of the power transistors is paralleled (base-to-base) by a smaller transistor which provides a scaled current output (proportional to that of the corresponding power transistor) to the opposite control circuit. The control circuit includes static current-thresholding disable logic, which prevents turn-on until the currents through the opposite power devices have declined to threshold levels. Thus, as long as either control circuit is driving one of the pull-up transistors into in the on-state, the other control circuit will not be able to turn on the pull-down transistor which is in series with the active pull-up transistor. This efficiently prevents any condition of unlimited crowbar current, without adding any excess delay or causing any high-impedance condition at the output.

摘要翻译： 一个H桥电路，包括四个功率晶体管（npn下拉和每个输出端子的pnp上拉）。 连接两个控制电路以以互补的交叉配置驱动这些晶体管，使得每个控制电路可以在负载的一侧上的上拉晶体管和负载的相对侧上的下拉晶体管导通。 每个功率晶体管由较小的晶体管并联（基极到基极），其提供与相对的控制电路成比例的电流输出（与对应的功率晶体管成比例）。 控制电路包括静态电流阈值禁用逻辑，其可以防止导通，直到通过相对的功率器件的电流已经下降到阈值电平。 因此，只要任一控制电路将上拉晶体管中的一个驱动到导通状态，则另一控制电路将不能接通与有源上拉串联的下拉晶体管 晶体管。 这有效地防止了无限制的撬棒电流的任何条件，而不会增加任何超出延迟或在输出端引起任何高阻抗条件。

公开(公告)号：US6037826A

公开(公告)日：2000-03-14

申请号：US99243

申请日：1993-07-28

申请人： Vanni Poletto ,  Marco Morelli

发明人： Vanni Poletto ,  Marco Morelli

IPC分类号： H01L29/73 ,  G05F1/569 ,  H01L21/331 ,  H03K17/0422 ,  H03K17/08

CPC分类号： G05F1/569 ,  H03K17/0422

摘要： Saturation of a bipolar power transistor is controlled by sensing the current which is eventually injected into the substrate of the integrated circuit by the saturating transistor and using this signal for exerting a limiting action on the current which is driven to the base of the power transistor by a dedicated driving circuit. Unlike the prior art antisaturation systems, it is no longer necessary to precisely monitor the operating voltages across the terminals of the bipolar power transistor. A suitable sensing resistance may be integrated conveniently at a distance from the often complex integrated structure of the bipolar transistor. The system of the invention offers numerous advantages and ensures intervention of the antisaturation circuit only when the power transistor has positively reached a state of saturation, but well before any unwanted consequence.

摘要翻译： 双极功率晶体管的饱和度通过感测由饱和晶体管最终注入到集成电路的衬底中的电流来控制，并且使用该信号对通过功率晶体管的基极驱动的电流施加限制作用 专用驱动电路。 与现有技术的抗饱和系统不同，不再需要精确地监视双极功率晶体管的端子两端的工作电压。 合适的感测电阻可以方便地集成在与双极晶体管的经常复杂的集成结构相距一定距离处。 本发明的系统提供了许多优点，并且仅在功率晶体管正确地达到饱和状态，但在任何不期望的后果之前才能确保抗饱和电路的干预。

公开(公告)号：US5258723A

公开(公告)日：1993-11-02

申请号：US919991

申请日：1992-07-27

申请人： Michelangelo Mazzucco ,  Vanni Poletto ,  Marco Morelli

发明人： Michelangelo Mazzucco ,  Vanni Poletto ,  Marco Morelli

IPC分类号： G01N27/409 ,  H03F1/08 ,  H03F3/34 ,  H03F3/347 ,  H03F3/45

CPC分类号： H03F1/083 ,  H03F3/45479 ,  H03F2200/261

摘要： An amplifier including first and second input transistors which are connected to respective first and second feedback amplification circuits associated with respective frequency-compensating capacitances. The second feedback amplification circuit has a two-stage structure and includes an internal compensating capacitance. The three frequency-compensating capacitances can have low values and can thus conveniently be integrated in the same chip as the amplifier. The amplifier can be used, in particular, as an interface between a zirconium-dioxide oxygen sensor and an electronic control unit which have different earth conductors.

公开(公告)号：US5896057A

公开(公告)日：1999-04-20

申请号：US865721

申请日：1997-05-30

申请人： Stefania Chicca ,  Vanni Poletto ,  Marco Morelli

发明人： Stefania Chicca ,  Vanni Poletto ,  Marco Morelli

IPC分类号： G01R31/00 ,  H02H7/08 ,  H02H7/122 ,  H03K17/56

CPC分类号： H02H7/0844 ,  G01R31/006 ,  H02H7/1225

摘要： A troubleshooting circuit for locating malfunctions while driving an electric load by means of a bridge stage (M1, M2, M3, M4) which is connected between ground (GND) and the power supply (+VCC) in series with first and second resistors (Rsl, Rsh), respectively. First (COMP1) and second (COMP2) threshold comparators are coupled to the first resistor to sense a short-circuit to battery (+VCC) and an open-load condition, respectively. Coupled to the second resistor is a third threshold comparator (COMP3) adapted to sense a short-circuit to ground. The output signals from the comparators are sampled through flip-flops (FF1, FF2, FF3, FF4, FF5, FF6) upon a transistor in the bridge being switched to the off state.

摘要翻译： 用于通过连接在接地（GND）和与第一和第二电阻器（GND）和电源（+ VCC）串联的桥接级（M1，M2，M3，M4）来驱动电力负载的定位故障的故障排除电路 Rsl，Rsh）。 第一（COMP1）和第二（COMP2）阈值比较器分别耦合到第一电阻器以感测到电池（+ VCC）和开路负载条件的短路。 耦合到第二电阻器的是第三阈值比较器（COMP3），其适于感测到对地短路。 当桥接器中的晶体管切换到关闭状态时，来自比较器的输出信号通过触发器（FF1，FF2，FF3，FF4，FF5，FF6）进行采样。

公开(公告)号：US5280233A

公开(公告)日：1994-01-18

申请号：US842294

申请日：1992-02-26

申请人： Vanni Poletto ,  Marco Morelli ,  Bruno Murari

发明人： Vanni Poletto ,  Marco Morelli ,  Bruno Murari

IPC分类号： G05F1/56 ,  G05F1/569 ,  G05F1/59 ,  H02J9/06

CPC分类号： G05F1/59 ,  G05F1/569 ,  H02J9/061 ,  Y10T307/527 ,  Y10T307/625

摘要： A voltage regulator comprising a first power switch connected between the input terminal and output terminal; a storage condenser connected to the input terminal via a one-way switch; a second power switch connected between the condenser and the input terminal; and a regulating element connected to the output terminal and driving the power switches in such a manner as to maintain the output voltage constant. For better distributing electric and thermal stress and improving the reliability and working life of the regulator by reducing the interference caused by switching of the two power switches, a drive device is provided between the regulating element and the switches for detecting the input voltage and the voltage of the condenser, and keeping both switches on as long as the input voltage is above two given thresholds, turning off the second switch when the input voltage is higher than the condenser voltage and below the first threshold, and turning off the first switch when the input voltage is lower than the condenser voltage and below the second threshold.

摘要翻译： 一种电压调节器，包括连接在输入端子和输出端子之间的第一电源开关; 存储电容器，其通过单向开关连接到所述输入端子; 连接在电容器和输入端子之间的第二电源开关; 以及连接到输出端子并且以保持输出电压恒定的方式驱动电源开关的调节元件。 为了更好地分配电力和热应力，通过减少由两个电源开关切换引起的干扰，提高了稳压器的可靠性和使用寿命，驱动装置设置在调节元件和开关之间，用于检测输入电压和电压 并且只要输入电压高于两个给定阈值就保持两个开关接通，当输入电压高于冷凝器电压并低于第一阈值时关闭第二开关，并且当第二开关断开时，关闭第一开关 输入电压低于电容电压，低于第二阈值。

公开(公告)号：US5276405A

公开(公告)日：1994-01-04

申请号：US919891

申请日：1992-07-27

申请人： Michelangleo Mazzucco ,  Vanni Poletto ,  Marco Morelli

发明人： Michelangleo Mazzucco ,  Vanni Poletto ,  Marco Morelli

IPC分类号： G01N27/409 ,  H03F3/45

CPC分类号： H03F3/45479 ,  H03F3/45076 ,  H03F2200/261

摘要： An amplifier having a high input dynamic range as well as high CMRR and PSRR values and input impedance while using a single supply voltage, includes an input stage with two transistors which are biased by a constant current, preferably of less than 1 microampere, while the collectors of the transistors are kept at fixed reference voltages. The input signal applied between the emitters of the transistors is transferred to the terminals of a first resistor which is supplied with current from a circuit which mirrors the current into a second resistor, from the terminals of which the output signal is taken.The preferred application is for forming interfaces for lambda probes fitted to catalytic converters for motor vehicles.

摘要翻译： 具有高输入动态范围的放大器以及使用单电源电压时的高CMRR和PSRR值和输入阻抗，包括具有两个晶体管的输入级，其中两个晶体管被恒定电流偏置，优选小于1微安，而 晶体管的集电极保持在固定的参考电压。 施加在晶体管的发射极之间的输入信号被传送到第一电阻器的端子，该第一电阻器从从其输出信号的端子反射电流到第二电阻器的电路提供电流。 优选的应用是形成用于机动车辆的催化转化器的λ探针的界面。