-
公开(公告)号：US4888567A
公开(公告)日：1989-12-19
申请号：US250731
申请日：1988-09-28
CPC分类号： H03B5/36 , H03B2200/002 , H03B2200/0026
摘要： A voltage-controlled oscillator in which a phase shifter is connected to a ceramic piezoelectric resonator. The phase shifter has a first circuit branch containing an amplifier. A second circuit branch is connected in parallel with the first circuit branch and includes a low-pass filter connected in series with a controllable amplifier and switch. The output of the controllable amplifier is applied to a first input of the switch, and a source of reference potential is connected to a second input of that switch. The switch has an output connected to a summing element at a first input of the summing element. A second input of that summing element is connected to the amplifier in the first circuit branch. The output of the summing element is fed back to the ceramic piezoelectric resonator.
摘要翻译： 一种压控振荡器，其中移相器连接到陶瓷压电谐振器。 移相器具有包含放大器的第一电路支路。 第二电路分支与第一电路分支并联连接，并包括与可控放大器和开关串联连接的低通滤波器。 可控放大器的输出被施加到开关的第一输入端，并且参考电位源连接到该开关的第二输入端。 开关具有连接到求和元件的第一输入处的求和元件的输出。 该求和元件的第二输入端连接到第一电路支路中的放大器。 求和元件的输出反馈到陶瓷压电谐振器。
-
公开(公告)号：US4855688A
公开(公告)日：1989-08-08
申请号：US184258
申请日：1988-04-21
申请人： Patrick Douziech , Philippe Berger
发明人： Patrick Douziech , Philippe Berger
摘要： In a multiple reference frequency generator, instead of using a quartz crystal for each of the accurate frequencies to be produced, a single quartz crystal is used together with a current controlled oscillator (ICO) and a phase loop comprising a phase comparator (PHC) and a control current generator (GC). The current generator provides a current varying as a function of a voltage and inversely proportional to a resistor value. In a first step, the phase loop causes the oscillator to oscillate at a frequency F0 and the resistor has a value R0. In a second phase, the loop is opened and the resistor is given a value R1 causing the oscillator to oscillate at a frequency F1=F0.times.R0/R1.
摘要翻译： 在多参考频率发生器中，代替对要产生的每个精确频率使用石英晶体，单个石英晶体与电流控制振荡器（ICO）和包括相位比较器（PHC）和 控制电流发生器（GC）。 电流发生器提供电流变化的电压函数，并与电阻值成反比。 在第一步中，相位环路使振荡器以频率F0振荡，并且电阻器具有值R0。 在第二阶段，环路被打开，电阻器被给定为R1，使得振荡器以F1 = F0xR0 / R1的频率振荡。
-
公开(公告)号：US4837625A
公开(公告)日：1989-06-06
申请号：US155540
申请日：1988-02-12
申请人： Patrick Douziech , Philippe Berger
发明人： Patrick Douziech , Philippe Berger
CPC分类号： H04N5/53
摘要： An automatic gain control device for video signals in the form of an integrated circuit uses a loop comprising comparators (3, 4) for comparing the video signal to various thresholds. Up-down counters and driving circuit (5) up-down the comparison output signals, so that, in connection with the comparators output signals, different time constants are obtained to control the gain of an input circuit.
摘要翻译： 用于集成电路形式的视频信号的自动增益控制装置使用包括用于将视频信号与各种阈值进行比较的比较器（3,4）的回路。 上下计数器和驱动电路（5）将比较输出信号上变，使得与比较器输出信号相关，获得不同的时间常数来控制输入电路的增益。
-
4.发明授权Device for setting minimal and maximal frequencies of a frequency modulated video signal 失效用于设置调频视频信号的最小和最大频率的装置
公开(公告)号：US4918529A
公开(公告)日：1990-04-17
申请号：US201412
申请日：1988-06-02
申请人： Patrick Douziech , Philippe Berger
发明人： Patrick Douziech , Philippe Berger
摘要： A frequency control apparatus automatically sets minimum and maximum reference frequencies (f.sub.min and f.sub.max) of a frequency modulated video luminance signal. An insertion circuit receives first and second reference voltages corresponding to f.sub.min and f.sub.max output from an AGC amplifier of a video tape recorder, wherein f.sub.min and f.sub.max are synchronized with first and second control signals. A discriminator receives one of the reference frequencies, f.sub.min or f.sub.max, together with the frequency modulated video signal from a voltage controlled oscillator of the video tape recorder and generates two voltage levels related to the input frequencies. A comparator receives one of the two voltage levels from the discriminator, generating a difference voltage corresponding to the difference between the two input voltage levels. An output of the comparator is provided to a switch which is controlled by third and fourth control signals so that the output level of the comparator controls either (a) the setting of the gain of a variable gain amplifier of the video tape recorder or (b) feeds one of the inputs of an adder of the video tape recorder. The switch is responsive to the reference frequency supplied to the discriminator to servo-control the video signal output by the voltage controlled oscillator either by f.sub.min or f.sub.max.
摘要翻译： 频率控制装置自动设定频率调制视频亮度信号的最小和最大参考频率（fmin和fmax）。 插入电路接收对应于从磁带录像机的AGC放大器输出的fmin和fmax的第一和第二参考电压，其中fmin和fmax与第一和第二控制信号同步。 鉴频器与来自录像机的压控振荡器的调频视频信号一起接收参考频率fmin或fmax中的一个，并产生与输入频率相关的两个电压电平。 比较器从鉴频器接收两个电压电平中的一个，产生对应于两个输入电压电平之差的差分电压。 比较器的输出被提供给由第三和第四控制信号控制的开关，使得比较器的输出电平控制（a）设置磁带录像机的可变增益放大器的增益或（b ）馈送录像机的加法器的输入之一。 该开关响应于提供给鉴频器的参考频率，以通过fmin或fmax对由压控振荡器输出的视频信号进行伺服控制。
-
5.发明授权Circuit and process for chrominance decoding with analog or digital delay line in a television system of a pal or secam type 失效用于PAL或Secam类型的电视系统中用模拟或数字延迟线进行色度解码的电路和处理
公开(公告)号：US4553156A
公开(公告)日：1985-11-12
申请号：US559607
申请日：1983-12-08
申请人： Patrick Douziech , Michel Imbert
发明人： Patrick Douziech , Michel Imbert
CPC分类号： H04N9/64
摘要： The present invention provides a matching circuit for connecting a chrominance decoding integrated circuit normally connected by terminals to a conventional analog delay line so as to make it compatible with a digital delay line. This matching circuit comprises a switch connecting alternately each of the outputs of the integrated circuit to an analog-digital convertor connected to a digital delay line, to a digital-analog convertor, then to a switch routing the signal alternately to each of the two summators whose other inputs receive directly the output of the integrated circuit. The summators supply then respectively the chrominance signals R-Y and B-Y.
摘要翻译： 本发明提供了一种用于将通过端子正常连接的色度解码集成电路连接到常规模拟延迟线的匹配电路，以使其与数字延迟线兼容。 该匹配电路包括将集成电路的每个输出交替连接到连接到数字延迟线的模拟数字转换器的开关，数字模拟转换器，然后交替地将信号路由到两个求和器中的每一个的开关 其他输入端直接接收集成电路的输出。 求和器分别提供色度信号R-Y和B-Y。
-
6.发明授权Method and device for limiting the current of a cathode-ray tube during the frame return time 失效在框架返回时间限制阴极射线管的电流的方法和装置
公开(公告)号：US5134492A
公开(公告)日：1992-07-28
申请号：US637635
申请日：1991-01-04
申请人： Antoine Pery , Patrick Douziech
发明人： Antoine Pery , Patrick Douziech
IPC分类号： H04N5/59
CPC分类号： H04N5/59
摘要： A limiter device essentially includes a comparator connected to a capacitor charged by a current proportional to the beam current and short-circuited by pulses during one line just after the frame return pulses. This comparator receives a threshold voltage and its output is connected to a capacitor connected to another reference voltage, and this comparator is validated by the frame return pulses.
摘要翻译： 限幅器装置基本上包括连接到电容器的比较器，该电容器由与电流电流成比例的电流充电，并且在帧返回脉冲之后的一行期间由脉冲短路。 该比较器接收阈值电压，其输出连接到连接到另一个参考电压的电容器，该比较器由帧返回脉冲进行验证。
-
公开(公告)号：US4644388A
公开(公告)日：1987-02-17
申请号：US679112
申请日：1984-12-06
申请人： Patrick Douziech , Michel Imbert
发明人： Patrick Douziech , Michel Imbert
CPC分类号： H04N11/165
摘要： The present invention relates to chrominance decoding circuits and more particularly to a novel circuit for demodulating chrominance signals, B-Y or R-Y. This circuit comprises, connected in series, a multiplier multiplying the U or V-modulated chrominance signal by itself, a filter giving at the output the square (B-Y).sup.2 or (R-Y).sup.2 of the chrominance signal, a device for extracting the square root giving an absolute value .tbd.B-Y.tbd. or .tbd.R-Y.tbd. of the chrominance signal, and a multiplier multiplying said absolute value by the sign of the chrominance signal B-Y or R-Y to obtain at the output said chrominance signal, B-Y or R-Y.
摘要翻译： 本发明涉及色度解码电路，更具体地说，涉及用于解调色度信号B-Y或R-Y的新型电路。 该电路包括串联连接乘法器U或V调制色度信号的乘法器，滤波器在输出端给出色度信号的平方（BY）2或（RY）2，提取方波 根给出色度信号的绝对值3BOND BY 3BOND或3BOND RY 3BOND，乘法器将所述绝对值乘以色度信号BY或RY的符号，以在输出端获得所述色度信号BY或RY。
-
8.发明授权Method and circuit for frequency and phase locking a local oscillator for television 失效用于频率和相位锁定电视本地振荡器的方法和电路
公开(公告)号：US4561014A
公开(公告)日：1985-12-24
申请号：US563866
申请日：1983-12-21
申请人： Patrick Douziech , Michel Imbert
发明人： Patrick Douziech , Michel Imbert
摘要： A conventional phase locking loop for locking a local oscillator in phase and frequency to a color burst signal in a television system requires a highly stable (i.e. crystal controlled) oscillator whose free running frequency must be individually adjusted to be as close as possible to the desired frequency. The present invention enables such adjustment to take place automatically in operation rather than as a separate manufacturing step. The output from the oscillator is compared in phase with the color burst signal to which it is to be locked. The output from the phase comparator is applied to one input of a differential amplifier whose output constitutes an error signal for application to a frequency controlling input of the oscillator. The error signal is also applied to a threshold control circuit which causes an up/down counter to count up or down when the error signal lies outside a predetermined range. The counter total is converted to analog form and is applied to the control input in addition to the error signal.
摘要翻译： 用于将本地振荡器在相位和频率上锁定到电视系统中的色同步信号的常规相位锁定环路需要高度稳定（即，晶体控制的）振荡器，其自由运行频率必须被单独调整为尽可能接近所需的 频率。 本发明使得这种调节能够在操作中自动发生，而不是单独的制造步骤。 将振荡器的输出与要被锁定的色同步信号进行相位比较。 来自相位比较器的输出被施加到差分放大器的一个输入端，差分放大器的输出构成用于施加到振荡器的频率控制输入的误差信号。 误差信号也被应用于阈值控制电路，当阈值控制电路在错误信号位于预定范围之外时，其使向上/向下计数器向上或向下计数。 计数器总数转换为模拟形式，除误差信号之外还应用于控制输入。
-
公开(公告)号：US06781474B2
公开(公告)日：2004-08-24
申请号：US10351824
申请日：2003-01-27
IPC分类号： H04B304
摘要： An apparatus and method for tuning a filter (11) with oscillator alignment for applications where the filter tuning signal (19, 27) is generated independently of the local oscillator tuning signal and the tuning range is large, for example such as terrestrial and cable TV broadcasting (40 to 860 MHz). The filter being adapted to a filter tuning modulation signal (25) having a first frequency (F1) and a second frequency (F2). Values of the output signal (28) are measured, a first value (S1) at the first frequency, and a second value (S2) at the second frequency, and a comparison signal (26) is generated in comparing the first value and the second value to adjust filter with the tuning control signal in response to the comparison signal, modulation signal and an approximate filter tuning signal to provide a desired signal at the output signal.
摘要翻译： 用于在与本地振荡器调谐信号和调谐范围无关地产生滤波器调谐信号（19,27）的应用中调谐具有振荡器对准的滤波器（11）的装置和方法很大，例如地面和有线电视 广播（40至860 MHz）。 滤波器适用于具有第一频率（F1）和第二频率（F2）的滤波器调谐调制信号（25）。 测量输出信号（28）的值，第一频率的第一值（S1）和第二频率的第二值（S2），以及比较信号（26），将第一值和 响应于比较信号，调制信号和近似滤波器调谐信号来调整具有调谐控制信号的滤波器的第二值，以在输出信号处提供期望的信号。
-
公开(公告)号：US5606228A
公开(公告)日：1997-02-25
申请号：US318932
申请日：1994-10-06
申请人： John A. Shepherd , Patrick Douziech
发明人： John A. Shepherd , Patrick Douziech
CPC分类号： H04N7/0122 , H03K4/50 , H04N3/223
摘要： A television vertical timebase circuit includes an arrangement (10, 25, 30, 35, 40, 45) for generating a vertical ramp voltage of first and second slopes corresponding to 4:3 and 16:9 aspect ratios. An arrangement (50,55,65) adds a predetermined voltage to a predetermined portion of the 16:9 ratio ramp voltage such that unwanted visible signals are positioned outside the visible screen area when displaying 16:9 aspect ratio pictures.
摘要翻译： 电视垂直时基电路包括用于产生对应于4：3和16：9纵横比的第一和第二斜率的垂直斜坡电压的装置（10,25,30,35,40,45）。 布置（50,55,65）将预定电压加到16:9比例斜坡电压的预定部分，使得当显示16：9宽高比图像时，不可见的可见信号位于可见屏幕区域的外部。
-
-
-
-
-
-
-
-
-
搜索结果
10 条记录 (耗时 0.016 秒)
