-
公开(公告)号：EP0777391A2
公开(公告)日：1997-06-04
申请号：EP96119124.4
申请日：1996-11-28
发明人： Hosoya, Nobukazu
IPC分类号： H04N9/78
摘要： An apparatus for processing television signal includes an A/D converter which converts a television signal (a luminance signal) into a digital television signal. A sampling circuit samples television signal data outputted from the A/D converter in response to a sampling clock outputted from a VCO included in a PLL, and outputs sampled data. An output of the A/D converter is also applied to a band elimination filter which outputs luminance signal data that a chrominance signal component is completely eliminated. The sampled data and the luminance signal data are compared with each other by a comparator, and an output of the comparator is applied to a low-pass filter included in the PLL during a burst period. An output of the low-pass filter becomes a control voltage signal for the VCO, whereby an oscillation frequency (phase) of the VCO is controlled.
-
公开(公告)号：EP0520485B1
公开(公告)日：1996-05-15
申请号：EP92110803.1
申请日：1992-06-26
发明人： Honda, Fumiaki , Hosoya, Nobukazu
IPC分类号： H03H11/26
CPC分类号： H03H11/265
-
公开(公告)号：EP0665646A1
公开(公告)日：1995-08-02
申请号：EP95100993.5
申请日：1995-01-25
发明人： Hosoya, Nobukazu
IPC分类号： H03H11/04
CPC分类号： H03H11/0466 , H03H11/0433
摘要： A filter circuit includes a differential amplifier having a mutual conductance of g m1 , and a transistor T₁ which attenuates an output current of the differential amplifier by 1/β (β is a current amplification factor) is arranged at a stage succeeding to the differential amplifier, whereby terms of g m1 in equations respectively representative of a resonance frequency ω 0̸ and a quality factor Q are multiplied by 1/β, respectively. Since the term of g m1 exists in a numerator within a root symbol ( √) in the equation representative of the resonance frequency ω 0̸ , by arranging the transistor T₁, the resonance frequency ω 0̸ can be decreased by 1/√β times. Furthermore, since the term of g m1 exists in a denominator within a root symbol (√) in the equation representative of the quality factor Q, by arranging the transistor T₁, the quality factor can be increased by √β times.
摘要翻译： 滤波器电路包括具有gm1的互导的差分放大器，并且将差分放大器的输出电流衰减1 /β（β为电流放大系数）的晶体管T1布置在差分放大器之后的阶段， 由此分别代表谐振频率ω0和质量因子Q的方程式中的gm1的项分别乘以1 /β。 由于gm1的术语通过表示谐振频率ω0的方程式存在于根符号（2ROOT）内的分子中，通过布置晶体管T1，谐振频率ω0可以减少1/2倍的β倍。 此外，由于在表示质量因子Q的方程式中，gm1的术语以根符号（2ROOT）内的分母存在，通过布置晶体管T1，可以通过2ROOTβ倍增加品质因子。
-
34.发明公开Circuit for correcting the phase of a chrominance signal 失效Schaltung zum Korrigieren der Phase einesFarbträgersignals。
公开(公告)号：EP0551901A2
公开(公告)日：1993-07-21
申请号：EP93100481.6
申请日：1993-01-14
IPC分类号： H04N9/89
CPC分类号： H04N9/893
摘要： A chrominance signal correcting circuit (10) includes a first all-pass filter (14) which receives a chrominance signal inputted from a terminal (12). A phase reference signal from an oscillator (20) is applied to a first phase-comparator (18) together with an output signal from the first all-pass filter (14), after the same is phase-shifted by 90 degrees by a first phase-shifter (20). A signal according to a phase difference of the both signals is outputted from the first phase-comparator (18) and applied to the first all-pass filter (14) via a first low-pass filter (24) and a capacitor (26). Therefore, in the first all-pass filter (14), a delay time is varied in accordance with the phase difference between the chrominance signal and the phase reference signal. Therefore, a jitter component of the chrominance signal can be removed.
摘要翻译： 突发相位校正电路（10）包括接收从终端（12）输入的色度信号的第一全通滤波器（14）。 来自振荡器（20）的相位参考信号与来自第一全通滤波器（14）的输出信号一起被施加到第一相位比较器（18），在相位被相移90度之后被第一 移相器（20）。 根据两个信号的相位差的信号从第一相位比较器（18）输出，经由第一低通滤波器（24）和电容器（26）施加到第一全通滤波器（14） 。 因此，在第一全通滤波器（14）中，延迟时间根据色度信号和相位参考信号之间的相位差而变化。 因此，可以去除色度信号的抖动分量。
-
公开(公告)号：EP0511682A3
公开(公告)日：1993-05-26
申请号：EP92107465.4
申请日：1992-04-30
IPC分类号： H04N9/78
CPC分类号： H04N9/78
摘要： A Y/C separation circuit includes a glass delay line for delaying an input composite video signal. A luminance signal and a chrominance signal are separated from each other by an adding circuit and a subtracting circuit each of which receives the input signal and an output signal from the glass delay line. The output signal from the glass delay line is phase-shifted by a 90° phase shifting circuit and then inputted to a multiplier which further receives the input signal. The multiplier outputs an error signal according to a phase difference between color burst signals included in the both signals, and a control voltage according to the error signal is outputted from a low-pass filter. The control voltage is applied to gyrators which terminate an input and an output of the glass delay line, respectively, whereby an inductance value of each of the gyrators is controlled by the control voltage such that a delay time of the glass delay line can be exactly adjusted at one horizontal period.
-
公开(公告)号：EP0521404A1
公开(公告)日：1993-01-07
申请号：EP92110802.3
申请日：1992-06-26
发明人： Honda, Fumiaki , Hosoya, Nobukazu
IPC分类号： H03H11/48
CPC分类号： H03H11/483
摘要： A capacitive circuit (10), which is incorporated in an integrated circuit, includes a high-pass type non-inverting amplifier (12) which receives an input signal (ei) and a differential amplifier (14) which receives the input signal and an output signal (eo) of the non-inverting amplifier. A differential component between the both signals is detected by the differential amplifier and fed-back to the input signal, whereby an input impedance shows a capacitive characteristic because the input signal is phase-shifted by 90 degrees.
摘要翻译： 集成在集成电路中的电容电路（10）包括接收输入信号（ei）的高通型非反相放大器（12）和接收输入信号的差分放大器（14），和 非反相放大器的输出信号（eo）。 两个信号之间的差分分量由差分放大器检测并反馈到输入信号，由此输入阻抗显示出电容特性，因为输入信号相移90度。
-
公开(公告)号：EP0379210A3
公开(公告)日：1992-08-26
申请号：EP90101084.3
申请日：1990-01-19
发明人： Hosoya, Nobukazu , Sasaki, Tooru
IPC分类号： H04N5/93
CPC分类号： H04N9/7912 , H04N9/7908 , H04N9/7933
摘要： An apparatus for reducing noise in the high-frequency band is provided in the preceding stage of a limiter (8) with a high-frequency band correcting filter (12) for reducing a high-frequency band component of a reproduced RF signal from an optical disc. The reproduced RF signal has its high-frequency component lowered before entered into the limiter (18), reducing noise and beat components. As a result, a signal which is less influenced by the noise and beat and has good S/N can be obtained.
-
38.发明公开Signal reproducing circuitry and signal reproducing method for optical disc player 失效光盘播放器的信号再现电路和信号再现方法
公开(公告)号：EP0332193A3
公开(公告)日：1991-10-23
申请号：EP89104208.7
申请日：1989-03-09
发明人： Sasaki, Tooru , Hosoya, Nobukazu
CPC分类号： H04N9/793 , G11B7/005 , H04N9/8216 , H04N9/835
摘要： Provided is a signal reproducing circuit for an optical disc player comprising a multidivisional photodetector (9) with photoelectric converting elements (D1, D2) in a preceding side and photoelectric converting elements (D3, D4) in a succeeding side relative to a proceeding direction of pits (11) of an optical disc (10), a variable delay circuit (50) for delaying outputs from the photoelectric converting elements in the preceding side, a circuit (51, 52, 53; 60) for detecting a time difference between an output from the photo electric converting elements in the succeeding side and an output from the variable delay circuit, and a circuit (C22, VC1 to VC3) responsive to an output from the time difference detecting circuit for changing a delay time of the variable delaying circuit. The signal reproducing circuit further comprises a circuit (72, 72′) for amplifying and correcting high frequency components of signals reproduced by the photo detector in response to the output from the time difference detecting circuit. This structure extends reproduced frequency band, improves high frequency characteristic of the video signals reproduced from the optical disc and supplies video signals having superior frequency characteristics.
-
39.发明公开Circuit for removing jitter of chrominance signal and television set using the same 失效电路用于抵消色度信号和电视接收器的抖动使用该电路的。
公开(公告)号：EP0421434A2
公开(公告)日：1991-04-10
申请号：EP90119073.6
申请日：1990-10-04
摘要： A frequency of a chrominance signal including a jitter component and separated from a color video signal is converted from a first frequency to a second frequency by first frequency converting means (51). Then, the chrominance signal which frequency is converted to the second frequency is converted to have the original frequency by second frequency converting means (52). The first frequency converting means and the second frequency converting means both includes a multiplier (51a,52a) and a bandpass filter (51b,52b). One multiplier of the first or the second frequency converting means receives a frequency signal corresponding to a phase difference between a reference frequency signal and a color burst signal separated from the chrominance signal. As a result, the jitter component is removed from the chrominance signal either in the first or the second frequency converting means. In the first and the second frequency converting means the input signal and the output signal so widely differ from each other in frequency that the respective frequency components included in the output signal of the multipliers in the respective frequency converting means expend widely along an axis of a frequency. As a result, the bandpass filter in each frequency converting means is enabled to easily extract only a signal of a desired frequency component.
摘要翻译： 色度信号包含抖动分量，并从一个彩色视频信号中分离的频率从第一频率由第一频率转换装置51中。然后，哪个频率被转换到第二频率被转换成色度信号转换到第二频率 具有由第二频率转换装置52。每个所述第一频率转换装置51和第二频率转换装置52包括一个乘法器和带通滤波器的原始频率。 所述第一和第二频率转换装置51和52中的一个乘法器接收的频率信号对应于参考频率信号和从色度信号分离出来的彩色同步信号之间的相位差。 其结果，抖动成分被去除形式色度信号无论是在所述第一或第二频率转换装置51或52在第一和第二频率转换装置51和52时，输入信号和输出信号，以便广泛分化 从海誓山盟在频率，包括在respectivement频率转换装置上的频率的轴线沿广泛花费乘法器的输出信号DASS模具respectivement频率分量。 其结果是，在每个频率转换装置的带通滤波器被使能以容易地提取所希望的频率分量的唯一的信号。
-
公开(公告)号：EP0047995B1
公开(公告)日：1987-07-29
申请号：EP81107183.6
申请日：1981-09-11
发明人： Hosoya, Nobukazu
IPC分类号： H04N9/465
CPC分类号： H04N9/455
-
-
-
-
-
-
-
-
-
搜索结果
56 条记录 (耗时 0.017 秒)
