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1. 发明授权

US5654675A Fully integrable phase locked loop with low jitter 失效
标题翻译：具有低抖动的完全可集成的锁相环
公开(公告)号：US5654675A
公开(公告)日：1997-08-05
申请号：US611831
申请日：1996-03-06
申请人： Melchiorre Bruccoleri , Gianfranco Vai , Salvatore Portaluri , Marco Demicheli
发明人： Melchiorre Bruccoleri , Gianfranco Vai , Salvatore Portaluri , Marco Demicheli
IPC分类号： H03L7/093 , H03L7/089 , H03L7/099 , H03L7/107
CPC分类号： H03L7/0891 , H03L7/099 , H03L7/107 , H03L2207/04 , H03L7/0995
摘要： A fully integrated, phase locked loop (PLL) having improved jitter characteristics uses the same digital/analog converter (DAC) that is normally used to control the time constant of the low pass loop filter to control the value of a capacitance connected between the output of a voltage-to-current converting input stage of the voltage controlled oscillator and ground. The capacitance introduces a third pole in the loop's transfer function. In this way, the separation in the frequency domain between the zero and the third pole of the transfer function is kept constant; thus, the damping factor remains constant while the .omega..sub.0 of the PLL is varied.
摘要翻译：具有改进的抖动特性的完全集成的锁相环（PLL）使用相同的数/模转换器（DAC），其通常用于控制低通环路滤波器的时间常数，以控制连接在输出端压控振荡器和地的电压 - 电流转换输入级。电容在循环传递函数中引入了第三极点。以这种方式，传递函数的零和第三极之间的频域分离保持不变; 因此，阻尼因子保持恒定，同时PLL的ω0变化。

2. 发明授权

US5714903A Low consumption analog multiplier 失效
标题翻译：低功耗模拟乘法器
公开(公告)号：US5714903A
公开(公告)日：1998-02-03
申请号：US575872
申请日：1995-12-21
申请人： Melchiorre Bruccoleri , Gaetano Cosentino , Marco Demicheli , Salvatore Portaluri
发明人： Melchiorre Bruccoleri , Gaetano Cosentino , Marco Demicheli , Salvatore Portaluri
IPC分类号： G06G7/16 , G06G7/163 , G06F7/44
CPC分类号： G06G7/163
摘要： An analog multiplier includes at least a differential output stage formed by a pair of emitter-coupled bipolar transistors. Each transistor of the pair of emitter-coupled bipolar transistors is driven by a predistortion stage having a reciprocal of a hyperbolic tangent transfer function that is attributable to the base currents of the bipolar transistors used in the predistortion stage. The error in the output signal produced by the analog multiplier is compensated by generating replicas of the base currents of the bipolar transistors of the differential output stage and forcing those replica currents on the output node of a respective predistortion stage. Various embodiments that consume different amounts of power are described.
摘要翻译：模拟乘法器至少包括由一对发射极耦合双极晶体管形成的差分输出级。一对发射极耦合双极晶体管中的每个晶体管由具有双曲正切传递函数的倒数的预失真级驱动，该双曲正切转移函数归因于在预失真级中使用的双极型晶体管的基极电流。由模拟乘法器产生的输出信号中的误差通过产生差分输出级的双极晶体管的基极电流的副本并且迫使在相应的预失真级的输出节点上的那些复制电流来补偿。描述消耗不同功率量的各种实施例。

3. 发明授权

US06414810B1 Read channel equalization with enhanced signal to noise ratio 有权
标题翻译：读取信道均衡，增强信噪比
公开(公告)号：US06414810B1
公开(公告)日：2002-07-02
申请号：US09301192
申请日：1999-04-28
申请人： Giacomino Bollati , Melchiorre Bruccoleri , Salvatore Portaluri , Luca Celant
发明人： Giacomino Bollati , Melchiorre Bruccoleri , Salvatore Portaluri , Luca Celant
IPC分类号： G11B5035
CPC分类号： G11B20/10046 , G11B2220/2516
摘要： A method of equalizing a read channel of a mass magnetic memory device comprises attenuating the low frequencies of the spectrum of the analog signal originating from an electromagnetic read transducer without boosting the high frequency harmonic components of the spectrum. The low frequencies of the spectrum of the analog input signal are attenuated with a low pass filter of an order in a range from 6 to 8 and a boost is implemented by introducing two real and opposed zeroes in the transfer function of the filter without altering the group delay.
摘要翻译：均衡质量磁存储器件的读通道的方法包括衰减源自电磁读取换能器的模拟信号的频谱的低频，而不会增加频谱的高频谐波分量。模拟输入信号的频谱的低频通过6至8范围内的阶数的低通滤波器衰减，并且通过在滤波器的传递函数中引入两个实数和相对的零来实现升压，而不改变群延迟

4. 发明授权

US6140867A Transconductance control circuit, particularly for continuous-time circuits 有权
标题翻译：跨导控制电路，特别适用于连续时间电路
公开(公告)号：US6140867A
公开(公告)日：2000-10-31
申请号：US312003
申请日：1999-05-14
申请人： Marco de Micheli , Salvatore Portaluri , Giacomino Bollati , Melchiorre Bruccoleri
发明人： Marco de Micheli , Salvatore Portaluri , Giacomino Bollati , Melchiorre Bruccoleri
IPC分类号： G05F3/26 , H03F3/30 , H03H11/04 , H03B1/00
CPC分类号： H03F3/3001 , H03H11/0472
摘要： Embodiments of the invention provide a transconductance control circuit, particularly for a continuous-time filter, comprising a transconductor across which a constant voltage is input. The transconductor is connected to a digital-to-analog converter (DAC) to set a reference current. A feedback loop is provided between an output of the transconductor and an input. In particular, the circuit further comprises a means for mirroring the reference current set by the DAC both to the feedback loop and to at least one cell of a cascade-connected filter.
摘要翻译：本发明的实施例提供跨导控制电路，特别是对于连续时间滤波器，包括跨导体，跨导体输入恒定电压。跨导体连接到数模转换器（DAC）以设置参考电流。在跨导体的输出和输入之间提供反馈回路。特别地，电路还包括用于将DAC设置的参考电流镜像到反馈回路和级联连接的滤波器的至少一个单元的装置。

5. 发明授权

US06667868B2 Thermal shutdown control for multi-channel integrated circuit boards 有权
公开(公告)号：US06667868B2
公开(公告)日：2003-12-23
申请号：US09970540
申请日：2001-10-03
申请人： Salvatore Portaluri , Marco Demicheli
发明人： Salvatore Portaluri , Marco Demicheli
IPC分类号： H02H504
CPC分类号： H02H5/041
摘要： A multi-channel power shut-down circuit that includes a plurality of channel disabler circuits formed on a common substrate where each of the channel disabler circuits includes a first combinational logic and a second combinational logic having an input coupled to an output of the first combinational logic and having a channel disable output, and a channel overcurrent detector coupled to an input of the first combinational logic. A thermal warning detector is also formed on the common substrate and coupled to the inputs of the first combinational logic of the plurality of channel disabler circuits. A thermal shutdown detector formed on the common substrate and coupled to the inputs of the second combinational logic of the plurality of channel disabler circuits.

6. 发明授权

US06246289B1 Variable-gain multistage amplifier with broad bandwidth and reduced phase variations 有权
标题翻译：可变增益多级放大器，带宽宽，相位变化减小
公开(公告)号：US06246289B1
公开(公告)日：2001-06-12
申请号：US09507562
申请日：2000-02-18
申请人： Valerio Pisati , Salvatore Portaluri , Alessandro Savo , Stefano Marchese
发明人： Valerio Pisati , Salvatore Portaluri , Alessandro Savo , Stefano Marchese
IPC分类号： H03F345
CPC分类号： H03G1/0023
摘要： A programmable-gain multistage amplifier with broad bandwidth and reduced phase variations having a differential input stage biased by a first current source and to which a differential voltage signal is fed, the stage being connected to a pair of diodes in which the cathode terminals are connected to respective bipolar transistors, which are biased by a second current source and in which the collector terminals are connected to load resistors, the differential output of the amplifier being provided at the collector terminals of the bipolar transistors. The amplifier further includes two circuit branches, each of which is constituted by a bipolar transistor and by a third current source, which is respectively connected to the collector terminal and emitter terminal of the bipolar transistor, in which the base terminal receives the differential voltage signal and the collector terminal is connected to the cathode terminal of a respective one of the two diodes, the circuit branches being mutually connected by means of a pair of capacitors.
摘要翻译：一种具有宽带宽和相位变化较小的可编程增益多级放大器，具有由第一电流源偏置的差分输入级，馈送差分电压信号，该级连接到阴极端子连接的一对二极管到由双极晶体管的集电极端子提供的由第二电流源偏置并且其中集电极端子连接到负载电阻器的各个双极晶体管，放大器的差分输出被提供。放大器还包括两个电路分支，每个电路分支由双极晶体管和第三电流源构成，第三电流源分别连接到双极晶体管的集电极端子和发射极端子，其中基极端子接收差分电压信号并且集电极端子连接到两个二极管中的相应一个的阴极端子，电路分支通过一对电容器相互连接。

7. 发明授权

US06222751B1 Driver circuit for a polyphase DC motor with minimized voltage spikes 有权
标题翻译：具有最小电压尖峰的多相直流电机的驱动电路
公开(公告)号：US06222751B1
公开(公告)日：2001-04-24
申请号：US09571354
申请日：2000-05-15
申请人： Salvatore Portaluri , Alessandro Savo , Maurizio Nessi , Luigi Eugenio Garbelli , Giorgio Sciacca
发明人： Salvatore Portaluri , Alessandro Savo , Maurizio Nessi , Luigi Eugenio Garbelli , Giorgio Sciacca
IPC分类号： H02M75387
CPC分类号： H03K17/166 , H02M7/53803
摘要： A driver circuit includes a half-bridge output stage including two transistors with a common terminal for connection as the driver output to a coil of a DC motor. Two amplifiers drive the transistors in the push-pull operation and two capacitors are connected between the driver output and one input of a respective amplifier to form feedback loops for controlling the output slew-rate. Two current generators are selectively connected to an input of either of the amplifiers through respective pairs of switches. A commutation sequencer turns on and off the switches according to a commutation program. Comparators are connected to the drive output for detecting predetermined output voltage conditions and providing the commutation sequencer with signals for conditioning the commutation program as a function of the detected voltage conditions.
摘要翻译：驱动器电路包括半桥输出级，其包括具有用于连接的公共端子的两个晶体管，因为驱动器输出到直流电动机的线圈。两个放大器在推挽操作中驱动晶体管，并且两个电容器连接在驱动器输出和相应放大器的一个输入端之间，以形成用于控制输出转换速率的反馈回路。两个电流发生器通过相应的开关对选择性地连接到任一放大器的输入。换向顺序器根据换向程序打开和关闭开关。比较器连接到驱动输出端，用于检测预定的输出电压状况，并根据检测到的电压条件向换向定序器提供用于调节换向程序的信号。

8. 发明授权

US6037838A Amplifier with programmable gain and input linearity usable in high-frequency lines 有权
标题翻译：具有可编程增益和输入线性度的放大器可用于高频线路
公开(公告)号：US6037838A
公开(公告)日：2000-03-14
申请号：US264296
申请日：1999-03-08
申请人： Stefano Marchese , Valerio Pisati , Salvatore Portaluri , Alessandro Savo
发明人： Stefano Marchese , Valerio Pisati , Salvatore Portaluri , Alessandro Savo
IPC分类号： H03G1/00 , H03G7/06 , H03F3/45 , H03G7/00
CPC分类号： H03G7/06 , H03G1/0023
摘要： An amplifier with programmable gain and input linearity at high frequency allows an increase in the gain without effecting input linearity and without significantly increasing current consumption. The amplifier includes an input stage which receives a voltage signal for performing a current conversion thereof with compression. An output stage is connected to the input stage and decompresses the signal provided by the input stage for producing gain amplification thereof. The amplifier further includes at least one current amplifier stage interposed between the input stage and the output stage. The at least one current amplifier includes at least one bipolar transistor series-connected to a load diode and to a current source. A reduction in the transconductance of the load diode is provided in the at least one amplifier stage to determine a programmable gain factor for the amplifier.
摘要翻译：在高频下具有可编程增益和输入线性度的放大器可以增加增益，而不会影响输入线性度并且不会显着增加电流消耗。放大器包括输入级，其接收用于通过压缩执行其电流转换的电压信号。输出级连接到输入级，并且解压缩由输入级提供的信号，以产生其增益放大。放大器还包括插入在输入级和输出级之间的至少一个电流放大器级。至少一个电流放大器包括串联连接到负载二极管和电流源的至少一个双极晶体管。在所述至少一个放大器级中提供所述负载二极管的跨导的减小以确定所述放大器的可编程增益因子。

9. 发明授权

US06424172B1 Circuit structure for synthesizing time-continual filters 有权
标题翻译：用于合成时间连续滤波器的电路结构
公开(公告)号：US06424172B1
公开(公告)日：2002-07-23
申请号：US09796996
申请日：2001-02-28
申请人： Valerio Pisati , Salvatore Portaluri , Marco Cazzaniga , Rinaldo Castello
发明人： Valerio Pisati , Salvatore Portaluri , Marco Cazzaniga , Rinaldo Castello
IPC分类号： H03K19082
CPC分类号： H03H11/0422
摘要： This invention relates to a circuit structure of the feedforward type with programmable zeroes, particularly for synthesizing time-continual filters. This structure comprises a pair of amplification cells interconnected at least one interconnection node and connected between a first signal input of a first cell and an output terminal of the second cell, each cell comprising a pair of transistors which have a conduction terminal in common and have the other conduction terminals coupled respectively to a first voltage reference through respective bias members. The structure further comprises a circuit leg connecting a node of the first cell to the output terminal and comprising a transistor which has a control terminal connected to the node of the first cell, a first conduction terminal connected to the output terminal, and a second conduction terminal coupled to a second voltage reference through a capacitor. Thus, a released “zero” can be introduced in the right semiplane of the pole-zero complex plane to improve the flattening of group gain.
摘要翻译：本发明涉及具有可编程零点的前馈类型的电路结构，特别是用于合成时间连续滤波器。该结构包括互连至少一个互连节点并连接在第一单元的第一信号输入和第二单元的输出端之间的一对放大单元，每个单元包括一对具有共同的导通端子并具有其它导电端子通过相应的偏置构件分别耦合到第一电压基准。所述结构还包括将所述第一单元的节点连接到所述输出端子并且包括具有连接到所述第一单元的节点的控制端子的晶体管，连接到所述输出端子的第一导通端子和第二导通端子通过电容器耦合到第二参考电压。因此，可以在极零复平面的右半平面中引入释放的“零”，以改善组增益的平坦化。

10. 发明授权

US06320439B1 Method and circuit of soft start and of power monitor for IC with multiple supplies 有权
标题翻译：具有多种电源的IC软启动和功率监控的方法和电路
公开(公告)号：US06320439B1
公开(公告)日：2001-11-20
申请号：US09657436
申请日：2000-09-07
申请人： Luigi Eugenio Garbelli , Giuseppe Luciano , Salvatore Portaluri
发明人： Luigi Eugenio Garbelli , Giuseppe Luciano , Salvatore Portaluri
IPC分类号： H03K302
CPC分类号： G01R31/40 , G05F1/468
摘要： The monitoring of multiple supply voltages of an integrated circuit is done using a single external capacitor connected to a pin of the integrated circuit. Part of the multiple supply voltages are externally generated and part are internally generated. The internally generated supply voltages may include different voltages with different signs. A logic signal indicating that all the supply voltages have reached pre-established values before enabling functioning of the integrated circuit is generated after an initial soft start phase of the turn-on process.
摘要翻译：使用连接到集成电路引脚的单个外部电容器对集成电路的多个电源电压进行监控。多个电源电压的一部分是外部产生的，部分内部产生。内部产生的电源电压可以包括具有不同符号的不同电压。指示在使能功能的集成电路之前所有电源电压达到预定值的逻辑信号在开启过程的初始软启动阶段之后产生。

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