公开(公告)号：US4801816A

公开(公告)日：1989-01-31

申请号：US158811

申请日：1988-02-22

申请人： Mauro Merlo ,  Silvano Coccetti

发明人： Mauro Merlo ,  Silvano Coccetti

IPC分类号： H03K4/501 ,  H03K4/00 ,  H03K4/62 ,  H03K4/48

CPC分类号： H03K4/625 ,  H03K4/00

摘要： This generator of periodic signals with exponential edges, which may be integrated at low cost, comprises a current source circuit connected to a capacitor and to a resistive element to supply them with currents having mutually correlated amplitudes, an amplifier interposed between the capacitor and the resistive element and adapted to maintain the voltage drop on the resistive element proportional to the voltage drop on the capacitor, and a switch device, connected in parallel to the capacitor and periodically switched off to allow the discharge of the capacitor.

公开(公告)号：US4803381A

公开(公告)日：1989-02-07

申请号：US55952

申请日：1987-06-01

申请人： Silvano Gornati ,  Roberto Viscardi ,  Silvano Coccetti

发明人： Silvano Gornati ,  Roberto Viscardi ,  Silvano Coccetti

IPC分类号： H03K4/50 ,  H04N3/16 ,  H03K4/08 ,  G05F3/16 ,  H03K4/10 ,  H03K17/56

CPC分类号： H03K4/50

摘要： This circuit comprises a current source stage connectable to a capacitor which is controlled so as to alternately and periodically charge with the current fed by the source stage and discharge through a switch element, so as to generate a saw-tooth wave voltage. A buffer circuit, with low-impedance output is connected to the capacitor, for feeding a saw-tooth shaped low-impedance voltage signal to a load. In order to prevent the bias current of the buffer stage from introducing an error in the capacitor charge current and in the frequency of the saw-tooth voltage, a current sensor is provided connected between the buffer stage and the current source stage so as to vary the current generated by the source stage in an equal but opposite manner with respect to the error current due to the buffer stage.

摘要翻译： 该电路包括可连接到电容器的电流源级，电容器被控制以便与由源级馈送的电流交替地和周期地充电，并通过开关元件放电，以产生锯齿波电压。 具有低阻抗输出的缓冲电路连接到电容器，用于将锯齿形的低阻抗电压信号馈送到负载。 为了防止缓冲级的偏置电流引入电容器充电电流和锯齿电压的频率中的误差，提供连接在缓冲器级与电流源级之间的电流传感器，以便改变 相对于缓冲器级的误差电流，由源级产生的电流以相等但相反的方式产生。

公开(公告)号：US4181878A

公开(公告)日：1980-01-01

申请号：US902282

申请日：1978-05-03

申请人： Bruno Murari ,  Silvano Coccetti

发明人： Bruno Murari ,  Silvano Coccetti

IPC分类号： H01L27/07 ,  H01L27/08 ,  H01L29/8605 ,  H01L27/04 ,  H01C1/14

CPC分类号： H01L27/0802 ,  H01L27/0738 ,  H01L27/0772 ,  H01L29/8605

摘要： A voltage divider with at least two intermediate taps of almost the same potential is formed in an integrated-circuit chip by diffusing P-type impurities into an N-type substrate along a narrow strip zone ending in enlarged terminal areas. The strip zone has at least two narrower transverse branches which form closely adjoining junctions with it and extend laterally in the same or in opposite directions. Upon application of a voltage difference across the strip zone by means of electrodes placed on the two terminal areas, output terminals in contact with the free ends of the branches remote from the strip zone and connected to high-resistance loads carry potentials substantially equal to those of the corresponding junctions.

摘要翻译： 在集成电路芯片中形成具有至少两个具有几乎相同电位的中间抽头的分压器，通过沿着扩大的终端区域结束的窄条带将P型杂质扩散到N型衬底中。 带区具有至少两个较窄的横向分支，其与其形成紧密邻接的连接点并且在相同或相反的方向上横向延伸。 通过放置在两个端子区域上的电极在带状区域之间施加电压差时，与远离带状区域的分支的自由端接触的并且连接到高电阻负载的输出端子承载的电位基本上等于 的相应路口。

公开(公告)号：US4837464A

公开(公告)日：1989-06-06

申请号：US55954

申请日：1987-06-01

申请人： Roberto Viscardi ,  Silvano Gornati ,  Silvano Coccetti

发明人： Roberto Viscardi ,  Silvano Gornati ,  Silvano Coccetti

IPC分类号： H03K5/26 ,  G09G5/12 ,  G09G5/18 ,  H03K4/90 ,  H03K5/13 ,  H03L7/06

CPC分类号： G09G5/12

摘要： This circuit comprises a phase-lock stage receiving at the input a reference signal and the synchronism signal EN and generating at the output a triangular signal in phase correlation with the synchronism signal, a rectangular waveform generator receiving at the input the triangular signal and supplying at the output a rectangular signal, a drive element receiving the rectangular signal and generating a periodic control signal, as well as a phase comparator receiving at the input the triangular signal and the control signal, as well as a further reference signal and generating at the output an error signal correlated with the phase shift of the drive element and fed to the rectangular waveform generator. The reference signal fed to the phase-lock stage or to the phase comparator can be suitably varied within preset limits by an external potentiometer.

摘要翻译： 该电路包括相位锁定级，在输入端接收参考信号和同步信号EN，并在输出端产生与同步信号相位相关的三角形信号;矩形波形发生器，在输入端接收三角形信号并在 输出矩形信号，接收矩形信号并产生周期性控制信号的驱动元件以及在输入端接收三角波信号和控制信号的相位比较器以及另一参考信号并在输出端产生 与驱动元件的相移相关并馈送到矩形波形发生器的误差信号。 馈送到锁相级或相位比较器的参考信号可以通过外部电位器在预设的限制内适当变化。

公开(公告)号：US4752722A

公开(公告)日：1988-06-21

申请号：US836116

申请日：1986-03-04

申请人： Pietro Erratico ,  Mauro Merlo ,  Silvano Coccetti

发明人： Pietro Erratico ,  Mauro Merlo ,  Silvano Coccetti

IPC分类号： H04N3/16 ,  H01J29/70 ,  H01J29/76

CPC分类号： H04N3/16

摘要： An amplifier stage with variable gain dependent on the anode voltage is interposed between a ramp generator having constant amplitude ramp output voltage and the vertical deflection stage in such a manner as to vary the input voltage of said vertical deflection stage in accordance with anode voltage variations. In such a manner the vertical deflection current varies correspondingly.

摘要翻译： 具有取决于阳极电压的可变增益的放大器级介于具有恒定幅度斜坡输出电压的斜坡发生器和垂直偏转级之间，以便根据阳极电压变化改变所述垂直偏转级的输入电压。 以这种方式，垂直偏转电流相应地变化。

公开(公告)号：US4916371A

公开(公告)日：1990-04-10

申请号：US210814

申请日：1988-06-24

申请人： Silvano Coccetti ,  Mauro Merlo ,  Roberto Viscardi

发明人： Silvano Coccetti ,  Mauro Merlo ,  Roberto Viscardi

IPC分类号： H04N3/19 ,  H03K4/69 ,  H04N3/16

CPC分类号： H03K4/696

摘要： The circuit, particularly suitable for high-definition monitors, wherein a power amplifier is fed by a supply voltage source to generate a deflection current in a yoke, furthermore comprises switching means which are activatable to connect another source of a supply voltage higher than the source to the amplifier, and flyback detector means to activate said switching means at the beginning of the flyback.

公开(公告)号：US4739228A

公开(公告)日：1988-04-19

申请号：US863842

申请日：1986-05-16

申请人： Roberto Viscardi ,  Silvano Coccetti ,  Silvano Gornati

发明人： Roberto Viscardi ,  Silvano Coccetti ,  Silvano Gornati

IPC分类号： H04N3/233 ,  H01J29/70 ,  H01J29/56 ,  H01J29/76 ,  H04N5/06

CPC分类号： H04N3/233

摘要： A variable-gain rectifier-amplifier with regulated voltage converts the output ramp of a ramp generator with regulating resistance of ramp amplitude into a triangular wave form with adjustable linearity which a feedback circuit brings back to said regulating resistance in the form of alternating current superimposing it on the direct current regulated through said resistance. This provides an S correction of the output ramp which depends on the gain regulation voltage of the rectifier-amplifier circuit.

摘要翻译： 具有调节电压的可变增益整流器放大器将斜坡发生器的输出斜坡转换成具有可调线性度的三角波形式的斜坡振幅调节电阻，反馈电路以交替电流的形式叠加到所述调节电阻 通过所述电阻调节直流电流。 这提供了取决于整流器 - 放大器电路的增益调节电压的输出斜坡的S校正。

公开(公告)号：US4672332A

公开(公告)日：1987-06-09

申请号：US854392

申请日：1986-04-21

申请人： Silvano Coccetti ,  Roberto Viscardi ,  Silvano Gornati

发明人： Silvano Coccetti ,  Roberto Viscardi ,  Silvano Gornati

IPC分类号： H03K3/0231 ,  H03K4/502 ,  H03K3/023 ,  H03K3/282

CPC分类号： H03K3/0231 ,  H03K4/502

摘要： This high accuracy, RC oscillator, particularly for monitors, has different switch-over thresholds independent from such variable parameters as the saturating voltage of transistors, and has a high operating frequency. The oscillator comprises a capacitor having an output terminal, a capacitor power current source, and a control section. The control section is composed of a plurality of differential stages sharing a common input and each having an input connected to a different switch-over threshold. The control section further comprises a switch-over drive stage connected to the oscillator output terminal and to an input terminal thereof for controlling activation and deactivation of the different differential stages (and hence, of the respective associated thresholds) according to the signal present at the output and input terminals of the oscillator.

摘要翻译： 这种高精度RC振荡器，特别是对于监视器，具有独立于诸如晶体管的饱和电压的可变参数的不同的切换阈值，并且具有高的工作频率。 振荡器包括具有输出端子的电容器，电容器功率电流源和控制部分。 控制部分由多个共用公共输入的差分级组成，每个具有连接到不同转换阈值的输入。 控制部分还包括连接到振荡器输出端及其输入端的切换驱动级，用于根据存在于所述振荡器输出端的信号控制不同差分级（并且因此相应的相应阈值）的激活和去激活 输出和输入端子。

公开(公告)号：US4417292A

公开(公告)日：1983-11-22

申请号：US377994

申请日：1982-05-13

申请人： Valerio Borghese ,  Pietro Erratico ,  Silvano Coccetti

发明人： Valerio Borghese ,  Pietro Erratico ,  Silvano Coccetti

IPC分类号： H03F1/52 ,  H03K4/08 ,  H03K4/69 ,  H03K17/082 ,  H02H3/26 ,  H03F3/04

CPC分类号： H03K17/0826 ,  H03F1/52 ,  H03K4/085 ,  H03K4/693

摘要： A protective current mirror, with a reflection ratio greater than one, is connected as the active load of an input differential amplifier of a power amplifier. This mirror is provided in addition to the usual current mirror which has its output connected to the drive transistor of the output power amplifier stage. The protective mirror senses the imbalance due to a voltage peak which occurs at an inverted input of the input differential amplifier at the very beginning of the descending portion of a sawtooth input signal ramp voltage and the protective mirror operates a protective transistor which is connected to the base of the power amplifier drive transistor so as to keep one power transistor of the final power amplifier stage in its inactive state. Protection of the output power transistor occurs before the output of the power amplifier has reached its maximum voltage level.

摘要翻译： 反射比大于1的保护电流镜被连接作为功率放大器的输入差分放大器的有源负载。 除了通常的电流反射镜之外还提供该反射镜，该反射镜的输出端连接到输出功率放大器级的驱动晶体管。 保护镜感测到由于在锯齿波输入信号斜坡电压的下降部分的最初开始在输入差分放大器的反相输入处发生的电压峰值的不平衡，并且保护镜操作保护晶体管，其连接到 功率放大器驱动晶体管的基极，以将最终功率放大器级的一个功率晶体管保持在其非激活状态。 输出功率晶体管的保护发生在功率放大器的输出达到其最大电压电平之前。