专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4837464A Phase regulation circuit, particularly for horizontal phase regulation in data displays 失效
标题翻译：相位调节电路，特别适用于数据显示中的水平相位调节
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。

2. 发明授权

US4803381A Bias current compensating circuit, particularly for saw-tooth wave generators 失效
标题翻译：偏置电流补偿电路，特别适用于锯齿波发生器
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。

3. 发明授权

US4739228A Electric circuit for S correction of the vertical scanning ramp in a television apparatus 失效
标题翻译：用于电视机中垂直扫描斜坡S校正的电路
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。

4. 发明授权

US4672332A RC oscillator having plural differential threshold stages 失效
标题翻译： RC振荡器具有多个差分阈值级
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。

5. 发明授权

US4967139A Temperature-independent variable-current source 失效
标题翻译：与温度无关的可变电流源
公开(公告)号：US4967139A
公开(公告)日：1990-10-30
申请号：US509435
申请日：1990-04-16
申请人： Giorgio Betti , Maurizio Zuffada , Fabrizio Sacchi , Silvano Gornati
发明人： Giorgio Betti , Maurizio Zuffada , Fabrizio Sacchi , Silvano Gornati
IPC分类号： G05F3/22
CPC分类号： G05F3/225 , Y10S323/907
摘要： This variable-current source comprises a differential stage and a pair of voltage buffers which respectively receive, at the input, a variable input voltage and a reference voltage and are connected at the output to the differential stage. Both buffers comprise a resistor flown by a current which varies only as a function of the respective input voltage and of its resistance and therefore depends thermally exclusively on this resistance, and provide output voltages which depend upon these currents, so that the output current generated by the differential stage is temperature-independent.

6. 再颁专利

USRE36508E Method of automatically measuring the horizontal scan frequency of a composite synchronism signal, and an electronic circuit operating in accordance with the method 失效
标题翻译：一种自动测量复合同步信号的水平扫描频率的方法，以及根据该方法操作的电子电路
公开(公告)号：USRE36508E
公开(公告)日：2000-01-18
申请号：US932000
申请日：1997-09-17
申请人： Silvano Gornati , Giorgio Betti , Fabrizio Sacchi , Gianfranco Vai , Maurizio Zuffada
发明人： Silvano Gornati , Giorgio Betti , Fabrizio Sacchi , Gianfranco Vai , Maurizio Zuffada
IPC分类号： H04N5/04 , H04N5/46 , H04N17/04 , H04N5/08 , H04N7/01
CPC分类号： H04N17/04 , H04N5/04 , H04N5/46
摘要： A method of automatically measuring the horizontal scan frequency of a composite synchronism signal, comprising horizontal synchronization impulses at line frequency, consists of first performing a count of a number of impulses having a repeat frequency higher than said line frequency, as intervening between two successive impulses at line frequency.The count value, corresponding to said number of impulses, is stored to obtain the line frequency of the signal, and thereafter, a series of down counts is effected, as initiated at predetermined times, until a change of frequency of the signal is detected.
摘要翻译：一种自动测量复合同步信号的水平扫描频率的方法，包括在线频率处的水平同步脉冲，包括首先执行具有高于所述线频率的重复频率的多个脉冲的计数，作为介于两个连续脉冲之间在线频率。存储对应于所述脉冲数的计数值以获得信号的线路频率，然后在预定时间开始进行一系列递减计数，直到检测到信号的频率变化。

7. 发明授权

US5495201A Transconductor stage 失效
标题翻译：跨导级
公开(公告)号：US5495201A
公开(公告)日：1996-02-27
申请号：US145989
申请日：1993-10-29
申请人： Roberto Alini , Maurizio Zuffada , David Moloney , Silvano Gornati
发明人： Roberto Alini , Maurizio Zuffada , David Moloney , Silvano Gornati
IPC分类号： H03F1/32 , H03F3/45 , H03H11/04 , G06G7/12
CPC分类号： H03F3/45071 , H03F1/3211 , H03H11/0422
摘要： A transconductor stage for high-frequency filters operated on a low voltage supply, being of a type which comprises an input circuit portion having signal inputs, further comprises a pair of interconnected differential cells (2,3) being associated each with a corresponding signal input. Each cell incorporates at least one pair of bipolar transistors (Q1,Q2;Q3,Q4) having at least one corresponding terminal thereof (e.g. the emitter terminal) connected in common.
摘要翻译：一种用于在低电压电源上工作的高频滤波器的跨导电压级，其包括具有信号输入的输入电路部分的类型，还包括一对互连的差分单元（2,3），其中每一个具有对应的信号输入。每个单元包含至少一对具有共同连接的至少一个对应端子（例如发射极端子）的双极晶体管（Q1，Q2; Q3，Q4）。

8. 发明授权

US5416389A Horizontal deflection stage linearity control device 失效
标题翻译：水平偏转台线性度控制装置
公开(公告)号：US5416389A
公开(公告)日：1995-05-16
申请号：US916386
申请日：1992-07-20
申请人： Mauro Merlo , Silvano Gornati
发明人： Mauro Merlo , Silvano Gornati
IPC分类号： H04N3/16 , H04N3/23 , H04N3/233 , G09G1/04 , H01J29/70
CPC分类号： H04N3/233
摘要： A device for controlling the linearity of a horizontal deflection stage comprising a deflection yoke supplied with a yoke current controlled by a switch and series-connected to a capacitor for varying the yoke voltage according to the phase of the yoke current; the device comprising a circuit for detecting and generating a real signal proportional to the yoke current, a ramp generator for generating an ideal ramp signal having rising portions defining a given S-shaped wave:form, and an error amplifier for receiving the real and ideal ramp signals and generating an error signal for driving a power transistor having its emitter and collector terminals connected parallel to the capacitor for modifying the voltage in the capacitor so that the yoke current assumes the required waveform.
摘要翻译：一种用于控制水平偏转级的线性的装置，包括偏转线圈，该偏转线圈由提供由开关控制的轭电流并串联连接到电容器，用于根据轭电流的相位改变轭电压; 该装置包括用于检测和产生与轭电流成比例的实际信号的电路;斜坡发生器，用于产生具有限定给定S形波形的上升部分的理想斜坡信号;以及误差放大器，用于接收实际和理想的产生用于驱动其发射极和集电极端子并联连接到电容器的功率晶体管的误差信号，用于修改电容器中的电压，使得磁轭电流呈现所需的波形。

9. 发明授权

US5263186A Control loop for reducing the time of repsonse of a tuner-AGC of a superheterodyne receiver and relative leading edge differentiating circuit used in the control loop 失效
标题翻译：用于减少调谐器的响应时间的控制环路 - 超外差接收机的AGC和控制环路中使用的相对前沿微分电路
公开(公告)号：US5263186A
公开(公告)日：1993-11-16
申请号：US641147
申请日：1991-01-15
申请人： Silvano Gornati , Giorgio Betti , Fabrizio Sacchi , Gianfranco Vai , Maurizio Zuffada
发明人： Silvano Gornati , Giorgio Betti , Fabrizio Sacchi , Gianfranco Vai , Maurizio Zuffada
IPC分类号： H04B1/18 , H03G3/30 , H04B1/26 , H04N5/52 , H04B1/16
CPC分类号： H03G3/3068
摘要： In a dynamic automatic loop for control of the overall gain of an input circuit of a superheterodyne receiver, the response time of the HF-AGC circuit of the TUNER, in response to the action of the TUNER DELAY circuit activated by the IF-AGC in the case of autonomously uncontrollable abrupt increases in the level of the antenna signal from the same HF-AGC of the TUNER, is markedly reduced using an additional TUNER DELAY PLUS circuit able to absorb for a determined interval of time, a discharge current from the storage capacitor the control voltage of the HF-AGC in addition to the discharge current absorbed by the existing TUNER DELAY circuit. The relevant intensity of this additional discharge current and its duration are optimized by way of suitable circuital arrangements in the design of said TUNER DELAY PLUS circuit. The response time is reduced without modifying the time constant of the HF-AGC, which cannot be freely reduced because of inter- and cross-modulation problems.

10. 发明授权

US5095363A Method of demodulating multi-standard TV signals and a circuit device for implementing the method 失效
标题翻译：解调多标准电视信号的方法和实现方法的电路装置
公开(公告)号：US5095363A
公开(公告)日：1992-03-10
申请号：US549610
申请日：1990-07-09
申请人： Maurizio Zuffada , Fabrizio Sacchi , Gianfranco Vai , Giorgio Betti , Silvano Gornati
发明人： Maurizio Zuffada , Fabrizio Sacchi , Gianfranco Vai , Giorgio Betti , Silvano Gornati
IPC分类号： H04N5/46 , H04N9/00 , H04N11/20
CPC分类号： H04N5/46
摘要： A method of demodulating multi-standard TV signals consists of providing a plurality of signals at a frequency which is a multiple of a reference frequency whose value is a common submultiple of the frequencies of the multi-standard signals. Thereafter, the signal to be demodulated is multiplied by one of said plural signals having a frequency which differs therefrom by a value equal to the reference frequency; by filtering the result of the multiplication, a signal is obtained at the reference frequency but corresponding in amplitude to the one to be demodulated.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式