公开(公告)号：US4698519A

公开(公告)日：1987-10-06

申请号：US812935

申请日：1985-12-23

申请人： Carlo Cini ,  Claudio Diazzi ,  Pietro Erratico

发明人： Carlo Cini ,  Claudio Diazzi ,  Pietro Erratico

IPC分类号： H03K17/0412 ,  H03K17/66 ,  H03K17/60 ,  H03K3/33

CPC分类号： H03K17/04126 ,  H03K17/665

摘要： A monolithically integrable high-efficiency control circuit for the switching of transistors includes a first transistor whose base terminal is connected to a source of switching signals. A second transistor whose base is connected to a current generator, drives a third transistor which connected in series with the first transistor such that the first and third transistors are connected between two terminals of a supply voltage generator. The emitter terminal of the third transistor forms an output terminal of the control circuit and is connected to the collector terminal of the first transistor by means of a parallel connected diode and a resistor combination. The circuit also includes a fourth transistor, whose base terminal is connected through a resistor to the base terminal of the third transistor and whose collector and emitter terminals are respectively connected to the base terminal of the second transistor and to the collector terminal of the first transistor.

摘要翻译： 用于晶体管开关的单片可积分高效率控制电路包括其基极连接到开关信号源的第一晶体管。 基极连接到电流发生器的第二晶体管驱动与第一晶体管串联连接的第三晶体管，使得第一和第三晶体管连接在电源电压发生器的两个端子之间。 第三晶体管的发射极端子形成控制电路的输出端，并通过并联二极管和电阻器组合连接到第一晶体管的集电极端子。 电路还包括第四晶体管，其基极端子通过电阻器连接到第三晶体管的基极端子，其集电极和发射极端子分别连接到第二晶体管的基极端子和第一晶体管的集电极端子 。

公开(公告)号：US4672326A

公开(公告)日：1987-06-09

申请号：US821926

申请日：1986-01-24

申请人： Carlo Cini ,  Claudio Diazzi ,  Pietro Erratico

发明人： Carlo Cini ,  Claudio Diazzi ,  Pietro Erratico

IPC分类号： H03F3/34 ,  H03F3/30 ,  H03F3/45 ,  H03G11/04

CPC分类号： H03F3/3071 ,  H03G11/04

摘要： This operational amplifier has an output range comprised between values adjustable as desired and includes a differential input stage and an output gain stage, and two additional differential stages supplied at one input with the output voltage of the operational amplifier and at the other input each with a reference voltage representing either the upper limit or the lower limit of the sought range. The outputs of the two additional differential stages are connected to the input stage of the operational amplifier such as not to interfere with the latter when the output voltage of the operational amplifier is comprised between the range limits and to allow switching off and functional substitution of the input stage for either differential stage when the operational amplifier output is equal to the reference voltage of this differential stage, so as to hold that reference voltage at the operational amplifier output regardless of the signal at the input to the operational amplifier.

摘要翻译： 该运算放大器的输出范围包括可根据需要调节的值，包括差分输入级和输出增益级，以及两个额外的差分级，在一个输入端提供运算放大器的输出电压，另一个输入端分别具有 参考电压代表所寻求范围的上限或下限。 两个附加差分级的输出连接到运算放大器的输入级，例如当运算放大器的输出电压在范围限度之间时不干扰后者，并允许关断和功能替换 当运算放大器输出等于该差动级的参考电压时，用于差分级的输入级，以便将运算放大器输出上的参考电压保持在与运算放大器的输入端的信号无关。

公开(公告)号：US4673889A

公开(公告)日：1987-06-16

申请号：US809506

申请日：1985-12-16

申请人： Carlo Cini ,  Claudio Diazzi ,  Pietro Erratico

发明人： Carlo Cini ,  Claudio Diazzi ,  Pietro Erratico

IPC分类号： H03F3/217 ,  H03F1/00 ,  H03F1/30 ,  H03F3/20 ,  H03F3/30 ,  H03F3/38

CPC分类号： H03F3/217 ,  H03F1/305 ,  H03F3/3044

摘要： In an audio switching power amplifier, muting apparatus provided for eliminating noise signals associated with turn-on and turn-off operations of the apparatus is disclosed. The muting apparatus disables the output power amplifiers and controls signal levels at various positions in the power amplifier to reduce transient conditions. Control apparatus applies the muting signals to the power amplifier during a predetermined period during start-up of the amplifier and applies the muting conditions immediately upon the turning off of power to the power amplifier.

摘要翻译： 在音频开关功率放大器中，公开了一种用于消除与该装置的导通和关断操作相关的噪声信号的静音装置。 静音设备禁用输出功率放大器并控制功率放大器中各个位置的信号电平，以减少瞬态条件。 控制装置在放大器启动期间的预定时段期间将功能放大器施加静音信号，并且在关闭功率放大器的电源时立即施加静音条件。

公开(公告)号：US4549095A

公开(公告)日：1985-10-22

申请号：US441851

申请日：1982-11-15

申请人： Fabrizio Stefani ,  Carlo Cini ,  Claudio Diazzi

发明人： Fabrizio Stefani ,  Carlo Cini ,  Claudio Diazzi

IPC分类号： G11B23/087 ,  G11B23/38 ,  H03K17/0412 ,  H03K17/64 ,  H03K17/60 ,  H03K3/26

CPC分类号： H03K17/64 ,  H03K17/04126

摘要： A control circuit for switching inductive loads which can be monolithically integrated and used in high-speed printing equipment and in chopper power supply systems. The circuit includes a final power transistor, driven for switching by means of a drive transistor coupled to its control terminal. A speedup circuit is connected to the control terminals of both of the transistors in order to accelerate the turning off of the transistors by reducing the discharge time thereof. Such a speedup circuit is enabled so as to remove charge carriers only for a period of time which begins when the transistors are turned off in order to avoid additional time delays when the transistors are subsequently turned on again.

摘要翻译： 用于切换感应负载的控制电路，其可以单片集成并用于高速打印设备和斩波电源系统中。 该电路包括一个最终的功率晶体管，驱动用于通过耦合到其控制端的驱动晶体管来切换。 加速电路连接到两个晶体管的控制端，以便通过减少晶体管的放电时间来加速晶体管的截止。 这样的加速电路被启用，以便仅在晶体管截止时开始的时间段内去除电荷载体，以便在再次接通晶体管时避免额外的时间延迟。

公开(公告)号：US4950919A

公开(公告)日：1990-08-21

申请号：US194602

申请日：1988-05-16

申请人： Domenico Rossi ,  Claudio Diazzi ,  Carlo Cini

发明人： Domenico Rossi ,  Claudio Diazzi ,  Carlo Cini

IPC分类号： H02P7/00 ,  H03K17/687 ,  H03K17/695

CPC分类号： H03K17/6871 ,  H02P7/04

摘要： In this MOS-transistor bridge circuit, for obtaining a fast flyback conduction of the current after a normal operation of the circuit, instead of the flyback diodes associated with each transistor of the bridge, the MOS transistors themselves are employed, driven so as to conduct current from the ground to the power supply, that is in the opposite direction with respect to that of normal operation. For this purpose a control section is provided receiving at the input a fast flyback signal and comprising delay gates connected to the disable inputs of the transistors, so as to delay switching off thereof, and to maintain in the on state two diagonally opposed transistors so as to allow current to flow from the ground to the power supply through these diagonally opposed transistors and the load until the current decreases to zero.

公开(公告)号：US4727465A

公开(公告)日：1988-02-23

申请号：US897467

申请日：1986-08-18

申请人： Carlo Cini ,  Claudio Diazzi ,  Domenico Rossi

发明人： Carlo Cini ,  Claudio Diazzi ,  Domenico Rossi

IPC分类号： H03K5/02 ,  H03F3/20 ,  H03F3/30 ,  H03K5/153 ,  H03K17/04 ,  H03K17/0412 ,  H03K17/042 ,  H03K17/06 ,  H03K17/687 ,  H03K19/017 ,  H02M3/335

CPC分类号： H03K17/04206 ,  H03K17/04123 ,  H03K17/6874 ,  H03K19/01714

摘要： This circuit, for reliably driving a load both in DC and AC mode with a low dissipation, comprises a pair of MOS power transistors, in a push-pull configuration, and a bootstrap circuit including a bootstrap capacitor placed between the source of the upper MOS transistor and a reference voltage point, through a first switch. A second switch is arranged between the supply line and the gate of the upper MOS transistor, while a third switch is arranged between the gate of the upper MOS transistor and the point common to the first switch and the bootstrap capacitor. During DC operation, the switches are open or closed in order to allow for the connection of the gate of the MOS power transistor to the supply voltage. During AC operation, the switches are controlled thereby, alternately the capacitor is charged at the voltage of the reference voltage point and the upper MOS transistor is held at a gate-to-source voltage sufficient to feed the load.

摘要翻译： 该电路用于可靠地驱动具有低功耗的直流和交流模式的负载，包括一对推挽配置的MOS功率晶体管，以及自举电路，该自举电路包括置于上MOS源之间的自举电容器 晶体管和参考电压点，通过第一开关。 第二开关设置在上MOS晶体管的电源线和栅极之间，而第三开关设置在上MOS晶体管的栅极和第一开关共用的点与自举电容之间。 在直流操作期间，开关是开或关的，以便将MOS功率晶体管的栅极连接到电源电压。 在交流运行期间，由此控制开关，交替地，电容器以参考电压点的电压被充电，并且上MOS晶体管被保持在足以馈送负载的栅极 - 源极电压。

公开(公告)号：US4725769A

公开(公告)日：1988-02-16

申请号：US36518

申请日：1987-04-09

申请人： Carlo Cini ,  Claudio Diazzi ,  Giuseppe Gattavari

发明人： Carlo Cini ,  Claudio Diazzi ,  Giuseppe Gattavari

IPC分类号： H03K17/08 ,  H01H47/32 ,  H02H3/087 ,  H02M3/155 ,  G05F1/573

CPC分类号： H01H47/325 ,  H02H3/087

摘要： The switching driving device with current limitation, operating reliably even with high switching frequencies, comprises a drive stage receiving at the input a timing clock signal at a preset frequency and generating at the output a drive signal synchronized with the timing clock signal, a power element connected at the input to the drive stage, receiving therefrom the drive signal and generating a load supply signal, a load fed by the power element, and a current sensor generating an overload signal when the current in the load has reached a preset threshold. The current limitation is obtained through a memory element connected to the current sensor and disabling the drive stage in the presence of the overload signal. In order to obtain a reliable operation, in the presence of the overload signal the drive stage is controlled at a switching frequency which is lower than the preset frequency of the timing clock signal.

摘要翻译： 具有电流限制的切换驱动装置即使具有高开关频率也可靠地运行，包括驱动级，在输入端接收预定频率的定时时钟信号，并在输出端产生与定时时钟信号同步的驱动信号，功率元件 连接到驱动级的输入端，从其接收驱动信号并产生负载供给信号，由功率元件馈送的负载，以及当负载中的电流达到预设阈值时产生过载信号的电流传感器。 通过连接到电流传感器的存储元件获得电流限制，并且在存在过载信号的情况下禁用驱动级。 为了获得可靠的操作，在存在过载信号的情况下，驱动级被控制在低于定时时钟信号的预设频率的开关频率。

公开(公告)号：US4736121A

公开(公告)日：1988-04-05

申请号：US897561

申请日：1986-08-18

申请人： Carlo Cini ,  Claudio Diazzi ,  Domenico Rossi

发明人： Carlo Cini ,  Claudio Diazzi ,  Domenico Rossi

IPC分类号： H03K5/02 ,  H03K5/153 ,  H03K17/04 ,  H03K17/0412 ,  H03K17/042 ,  H03K17/06 ,  H03K17/687 ,  H03K19/017 ,  H03K3/01 ,  H03K3/353 ,  H03K17/56

CPC分类号： H03K17/04123 ,  H03K17/04206 ,  H03K17/6874 ,  H03K19/01714

摘要： This charge pump circuit comprises a capacitor connected with a first terminal thereof to a reference voltage point through a first switch element and with a second terminal thereof to a switching section. The switching section, which is arranged between a positive supply voltage line and the ground, is controlled so as to alternately and selectively connect the second terminal of the capacitor to the positive supply and to ground. The first terminal of the capacitor is further connected to the gate of the MOS transistor to be driven. During operation the switch section is controlled so as to alternately charge the capacitor and allow transfer of the charge of the capacitor to the MOS transistor gate, thereby achieving a fast charging of the MOS transistor and a low circuit dissipation in the DC mode.

摘要翻译： 该电荷泵电路包括通过第一开关元件与其第一端子连接到参考电压点并且其第二端子连接到开关部分的电容器。 布置在正电源电压线和地之间的开关部分被控制，以便将电容器的第二端子交替且有选择地连接到正电源和地。 电容器的第一端子进一步连接到待驱动的MOS晶体管的栅极。 在操作期间，控制开关部分以交替地对电容器充电，并允许电容器的电荷传递到MOS晶体管栅极，从而实现MOS晶体管的快速充电和DC模式中的低电路耗散。

公开(公告)号：US4958251A

公开(公告)日：1990-09-18

申请号：US370445

申请日：1989-06-23

申请人： Carlo Cini ,  Bruno Murari

发明人： Carlo Cini ,  Bruno Murari

IPC分类号： H02J7/00 ,  H02H3/18 ,  H02H11/00

CPC分类号： H02H11/003 ,  Y10T307/839

摘要： A guarded electronic circuit from reversal of its supply battery polarity comprises a MOS power transistor connected between one pole of the battery and ground, to drive an electric load to ground, and a second, protection MOS transistor connected between the pole and the first transistor; said transistors, which are both provided with respective inherent diodes between the source and the drain, have their related drain electrodes connected together. The resulting circuit is self-protected against possible reversal of the polarity of the battery to which it is connected, and can protect the electric load driven thereby.

公开(公告)号：US5027250A

公开(公告)日：1991-06-25

申请号：US370442

申请日：1989-06-23

申请人： Carlo Cini ,  Bruno Murari

发明人： Carlo Cini ,  Bruno Murari

IPC分类号： G05F1/56 ,  G05F3/18 ,  H02H9/04

CPC分类号： H02H9/046 ,  Y10T307/839

摘要： An electronic circuit with a protection device against fluctuations in the supply battery voltage, being of a type which comprises a MOS power transistor connected between one pole of the battery and an electric load for driving said load to ground, further comprises a pair of Zener diodes connected to each other in a push-pull configuration, between said pole and the gate electrode of the power transistor.