公开(公告)号：US5696658A

公开(公告)日：1997-12-09

申请号：US539732

申请日：1995-10-05

申请人： Giovanni Pietrobon

发明人： Giovanni Pietrobon

IPC分类号： H03K17/042 ,  H03K17/082 ,  H02H5/04

CPC分类号： H03K17/0822 ,  H03K17/04206

摘要： A short circuit protection circuit which has a first short circuit protection circuit in parallel with a second short circuit protection circuit is disclosed. The first short circuit protection circuit includes a sense resistor and a comparator for detecting the short circuit, and a transistor and current source for turning off the low side driver when the short circuit is detected. The second short circuit protection circuit includes a current mirror, zener diode, transistor, and current source connected in series. The second short circuit protection circuit is in parallel with the first short circuit protection circuit. The second short circuit protection circuit accelerates the turn-off of the low-side driver with out affecting the stability of the circuit.

摘要翻译： 公开了具有与第二短路保护电路并联的第一短路保护电路的短路保护电路。 第一短路保护电路包括检测电阻器和用于检测短路的比较器，以及用于当检测到短路时关闭低侧驱动器的晶体管和电流源。 第二短路保护电路包括串联连接的电流镜，齐纳二极管，晶体管和电流源。 第二短路保护电路与第一短路保护电路并联。 第二个短路保护电路加速了低端驱动器的关断，从而影响了电路的稳定性。

公开(公告)号：US4972130A

公开(公告)日：1990-11-20

申请号：US435889

申请日：1989-11-14

申请人： Domenico Rossi ,  Andrea Cuomo ,  Giovanni Pietrobon

发明人： Domenico Rossi ,  Andrea Cuomo ,  Giovanni Pietrobon

IPC分类号： H02P8/12 ,  H02P7/00 ,  H03K17/687 ,  H03K17/693 ,  H03K17/695

CPC分类号： H03K17/6871 ,  H02P7/04 ,  H03K17/693

摘要： A multipurpose integrated circuit for driving in a switching mode an externally connected load or loads permits implementation of any appropriate supply scheme of the external load or loads through six output terminals thereof and is therefore useful in a large number of applications. The integrated circuit uses six integrated power switching devices provided with respective recirculation diodes and a single externally connected sensing resistor for generating, by means of a customary PWM control loop, a control signal by which means of a logic circuit configurable by progrmaming permits the generation of driving signals as a function of the control signal for all six integrated power switches in accordance with a configuration of the driving signals which conforms with the particular scheme of connection of the load or loads selected among the different bridge type and unipolar-motor type schemes which may be selected by programming. A multiplexer is used for selecting among bridge type driving signals and unipolar-motor type driving modes and a ROM provided with two input registers for selecting the specific driving scheme and for regulation, respectively.

公开(公告)号：USRE35806E

公开(公告)日：1998-05-26

申请号：US512904

申请日：1995-08-09

申请人： Domenico Rossi ,  Andrea Cuomo ,  Giovanni Pietrobon

发明人： Domenico Rossi ,  Andrea Cuomo ,  Giovanni Pietrobon

IPC分类号： H02P7/00 ,  H03K17/56

CPC分类号： H02P7/04

摘要： A multipurpose integrated circuit for driving in a switching mode an externally connected load or loads permits implementation of any appropriate supply scheme of the external load or loads through six output terminals thereof and is therefore useful in a large number of applications. The integrated circuit uses six integrated power switching devices provided with respective recirculation diodes and a single externally connected sensing resistor for generating, by means of a customary PWM control loop, a control signal by which means of a logic circuit configurable by .�.programaming.!. .Iadd.programming .Iaddend.permits the generation of driving signals as a function of the control signal for all six integrated power switches in accordance with a configuration of the driving signals which conforms with the particular scheme of connection of the load or loads selected among the different bridge type and unipolar-motor type schemes which may be selected by programming. A multiplexer is used for selecting among bridge type driving signals and unipolar-motor type driving modes and a ROM provided with two input registers for selecting the specific driving scheme and for regulation, respectively.

摘要翻译： 用于以开关模式驱动外部连接的负载或负载的多用途集成电路允许通过其六个输出端子实现外部负载或负载的任何适当供应方案，因此在大量应用中是有用的。 该集成电路使用六个集成的功率开关器件，它们具有各自的再循环二极管和一个外部连接的感测电阻器，用于通过常规的PWM控制环路产生一个控制信号，通过该控制信号可以通过[程序设计]编程允许 根据与不同桥型和单极电机之间选择的负载或负载的特定连接方案的驱动信号的配置，产生作为所有六个集成电力开关的控制信号的驱动信号的驱动信号 可以通过编程来选择类型方案。 多路复用器用于选择桥式驱动信号和单极电机类型驱动模式，以及一个ROM，分别具有两个输入寄存器，用于选择具体的驱动方案和调节。

公开(公告)号：US4914316A

公开(公告)日：1990-04-03

申请号：US283232

申请日：1988-12-12

申请人： Domenico Rossi ,  Giovanni Pietrobon ,  Sandro Storti ,  Carlo Cini

发明人： Domenico Rossi ,  Giovanni Pietrobon ,  Sandro Storti ,  Carlo Cini

IPC分类号： H02H7/08 ,  H03K17/00 ,  H03K17/06 ,  H03K17/24 ,  H03K17/695

CPC分类号： H03K17/24 ,  H03K17/063

摘要： A circuit for holding a MOS power transistor in a conduction state on the occurrence of an outage in the voltage supply, being of a type which comprises a first MOS transistor having its source connected to a line of the voltage supply and its drain connected to the gate of the power transistor, further comprises a diode connected between the drain of the first transistor and the gate of the power transistor, and a second transistor of the MOS type having its gate connected to the gate of the first transistor drain connected to the gate of the power transistor. The circuit prevents the gate capacitance of the power transistor from becoming discharged on a failure of the voltage supply, thus holding that transistor in a conducting state.

公开(公告)号：US20090039949A1

公开(公告)日：2009-02-12

申请号：US12186290

申请日：2008-08-05

申请人： GIOVANNI PIETROBON

发明人： GIOVANNI PIETROBON

IPC分类号： G05F1/10

CPC分类号： G05F3/30

摘要： A bandgap voltage reference circuit is achieved that does not resort to the use of resistors or regulation loops and is thus able to achieve improved noise performance while also exhibiting absolute stability, no start-up issues, and low input-voltage operation. Subcircuits comprised of four interconnected transistors of different junction areas are used to create differential base-emitter voltage sources with magnitudes that vary in direct proportion to absolute temperature. The voltages from several of these subcircuits are combined without resistors to create a voltage source that is proportional to absolute temperature. An additional transistor is operated as a forward-biased PN junction to create a voltage source that varies in a sense that is complementary to absolute temperature. By a judicious choice of the transistor-junction-area ratios and the number of subcircuits that are summed, the combination of the complementary and proportional voltage references produces a bandgap voltage reference that is nearly constant with variations in temperature. The unique summation technique presented results in a bandgap reference with a noise performance that is more than an order of magnitude better than the prior art, particularly for applications requiring low current consumption.

摘要翻译： 实现了带隙电压参考电路，其不采用电阻器或调节环路，因此能够实现改进的噪声性能，同时还具有绝对稳定性，无启动问题和低输入电压操作。 使用由不同结区域的四个互连晶体管组成的子电路来产生差分基极 - 发射极电压源，其幅度与绝对温度成正比。 来自这些子电路中的几个的电压被组合而没有电阻器以产生与绝对温度成比例的电压源。 额外的晶体管作为正向偏置PN结工作，以产生在与绝对温度互补的意义上变化的电压源。 通过明智地选择晶体管结面积比和相加的子电路数量，互补和比例电压基准的组合产生的带隙电压基准随温度变化几乎恒定。 所提出的独特的求和技术导致带隙参考，噪声性能比现有技术好多一个数量级，特别是对于需要低电流消耗的应用。

公开(公告)号：US6008972A

公开(公告)日：1999-12-28

申请号：US854667

申请日：1997-05-12

申请人： Giovanni Pietrobon

发明人： Giovanni Pietrobon

IPC分类号： H03K17/042 ,  H03K17/082 ,  H02H3/00

CPC分类号： H03K17/0822 ,  H03K17/04206

摘要： A short circuit protection circuit which has a first short circuit protection circuit in parallel with a second short circuit protection circuit is disclosed. The first short circuit protection circuit includes a sense resistor and a comparator for detecting the short circuit, and a transistor and current source for turning off the low side driver when the short circuit is detected. The second short circuit protection circuit includes a current mirror, zener diode, transistor, and current source connected in series. The second short circuit protection circuit is in parallel with the first short circuit protection circuit. The second short circuit protection circuit accelerates the turn-off of the low-side driver with out affecting the stability of the circuit.

摘要翻译： 公开了具有与第二短路保护电路并联的第一短路保护电路的短路保护电路。 第一短路保护电路包括检测电阻器和用于检测短路的比较器，以及用于当检测到短路时关闭低侧驱动器的晶体管和电流源。 第二短路保护电路包括串联连接的电流镜，齐纳二极管，晶体管和电流源。 第二短路保护电路与第一短路保护电路并联。 第二个短路保护电路加速了低端驱动器的关断，从而影响了电路的稳定性。

公开(公告)号：US5502416A

公开(公告)日：1996-03-26

申请号：US414779

申请日：1995-03-31

申请人： Giovanni Pietrobon

发明人： Giovanni Pietrobon

IPC分类号： G05F1/56 ,  G05F1/565 ,  H03K17/22 ,  H03K19/00 ,  H03K5/08

CPC分类号： G05F1/565

摘要： According to the present invention, an integrated regulator having an adjustable reset threshold is disclosed. The integrated regulator has the following elements contained within an integrated circuit device: a transistor, a voltage reference block, an internal resistive network, an operational amplifier which regulates the voltage output signal of the integrated regulator by regulating the base current of the transistor, and a comparator which senses and communicates to the user when the operational amplifier is unable to maintain the voltage output signal within an acceptable range of a desired value of the voltage output signal. External to the integrated circuit device is an external resistive network. When the reset output signal of the integrated regulator is equal to an active state, this is indicative that the operational amplifier has been unsuccessful in keeping the voltage output signal within the acceptable range of the desired value of the voltage output signal, i.e. the voltage output signal has fallen below the reset threshold or trip point of the integrated regulator. When the voltage output signal is back within the acceptable range of the desired value of the voltage output signal, the reset output signal of the integrated regulator is equal to an inactive state. The reset threshold of the integrated regulator may be easily and readily programmed by adjusting the external resistive network.

摘要翻译： 根据本发明，公开了一种具有可调复位阈值的集成调节器。 集成稳压器具有集成电路器件中的以下元件：晶体管，电压基准块，内部电阻网络，通过调节晶体管的基极电流来调节集成稳压器的电压输出信号的运算放大器，以及 当运算放大器不能将电压输出信号保持在电压输出信号的期望值的可接受范围内时，该比较器感测并与用户通信。 集成电路设备外部是外部电阻网络。 当集成调节器的复位输出信号等于有效状态时，这表明运算放大器不能将电压输出信号保持在电压输出信号的期望值的可接受范围内，即电压输出 信号低于集成稳压器的复位阈值或跳变点。 当电压输出信号回到电压输出信号的期望值的可接受范围内时，积分稳压器的复位输出信号等于无效状态。 集成调节器的复位阈值可以通过调整外部电阻网络来轻松编程。

公开(公告)号：US4928049A

公开(公告)日：1990-05-22

申请号：US245657

申请日：1988-09-16

申请人： Giovanni Pietrobon ,  Domenico Rossi ,  Salvatore Pappalardo

发明人： Giovanni Pietrobon ,  Domenico Rossi ,  Salvatore Pappalardo

IPC分类号： H02P8/12

CPC分类号： H02P8/12

摘要： The circuit controls current switching in multiple inductive loads (L1, L2, L3, L4) fed by means of respective switching switches (SW1, SW2, SW3, SW4) and by means of respective current adjustment switches (SWA, SWB), and comprises a single sense resistor (R) in series to said switching switches, and a single comparator circuit (C, FF) adapted to generate a logical signal (Q) when the voltage across the sense resistor exceeds a reference voltage (V.sub.ref), which drives a plurality of AND gates (PA, PB) which control said adjustment switches and the second inputs whereof are driven by respective square-wave signals in opposite phase with a period equal to twice the switching period.