公开(公告)号：US6052153A

公开(公告)日：2000-04-18

申请号：US734524

申请日：1996-10-18

申请人： Sebastien Marsanne ,  Philippe Berger ,  Vincent Chanel

发明人： Sebastien Marsanne ,  Philippe Berger ,  Vincent Chanel

IPC分类号： H04N5/04 ,  H04N5/46 ,  H03L7/00

CPC分类号： H04N5/04

摘要： Disclosed is a synchronization circuit that can be applied in the field of monitors and, especially, in the field of television receivers. The disclosed circuit comprises circuits to analyse and correct the horizontal and vertical synchronization signals in order to neutralize the effect of the signalling present in the horizontal synchronization signal on the working of a phase-locked loop.

摘要翻译： 公开了可以应用于监视器领域，特别是在电视接收机领域中的同步电路。 所公开的电路包括用于分析和校正水平和垂直同步信号的电路，以便中和水平同步信号中存在的信号对锁相环工作的影响。

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

IPC分类号： H04N5/922 ,  G11B20/06 ,  H03C3/09 ,  H04N5/92

CPC分类号： H04N5/92 ,  H03C3/09

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。

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

IPC分类号： H03L7/099 ,  H03L7/14 ,  H03L7/16

CPC分类号： H03L7/14 ,  H03L7/099 ,  H03L7/16

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

IPC分类号： H04N5/52 ,  H04N5/53

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。

公开(公告)号：US06215361B1

公开(公告)日：2001-04-10

申请号：US08922747

申请日：1997-09-03

申请人： Nicolas Lebouleux ,  Philippe Berger ,  Eric Cirot

发明人： Nicolas Lebouleux ,  Philippe Berger ,  Eric Cirot

IPC分类号： H03L7095

CPC分类号： H04N5/126 ,  H03L7/0891 ,  H03L7/0898 ,  H03L7/095 ,  H03L7/107 ,  Y10S331/02

摘要： The present invention relates to a phase-locked loop including a comparator and a charge pump. The comparator compares the phases of an input pulse signal and of a reference pulse signal and generates charge and discharge control signals, the charge pump being capable of charging or discharging the capacitive filter according to the charge and discharge control signals. The filter is charged or discharged when these signals are in a first state and insulated from the charge pump when they are in a second state. The loop includes a device for limiting the charge and discharge current of the capacitive filter, this device including windowing circuits for limiting the time during which the charge and discharge control signals are in the first state.

摘要翻译： 本发明涉及一种包括比较器和电荷泵的锁相环。 比较器比较输入脉冲信号和参考脉冲信号的相位，并产生充放电控制信号，电荷泵能够根据充放电控制信号对电容滤波器进行充电或放电。 当这些信号处于第一状态并且当它们处于第二状态时与电荷泵绝缘时，滤波器被充电或放电。 该环路包括用于限制电容滤波器的充电和放电电流的装置，该装置包括用于限制充电和放电控制信号处于第一状态的时间的开窗电路。

公开(公告)号：US4888567A

公开(公告)日：1989-12-19

申请号：US250731

申请日：1988-09-28

申请人： Philippe Berger ,  Pierre A. Berland ,  Patrick Douziech

发明人： Philippe Berger ,  Pierre A. Berland ,  Patrick Douziech

IPC分类号： H03B5/32 ,  H03B5/36

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。