公开(公告)号：JPS59122003A

公开(公告)日：1984-07-14

申请号：JP23232282

申请日：1982-12-27

申请人： Toshiba Corp

发明人： NAGASHIMA YOSHITAKE

IPC分类号： H03D3/00

CPC分类号： H03D3/00

摘要： PURPOSE:To obtain a frequency discriminator which is MOSIC-implemented, has simple circuit constitution, and eliminates the need for an external element such as a reactance element by providing a capacitor, MOSFET, and changeover switch. CONSTITUTION:The capacitor 1 with capacity C, MOSFET3, and changeover switch circuit 5 are provided. The changeover switch 5 receives an FM signal Sf to alternate the 1st and the 2nd states repeatedly at a frequency equal to or proportional to the frequency of the signal; the capacitor 1 is connected to a DC power source 2 in the 1st stage and to the source S of the MOSFET3 in the 2nd state. The gate of the MOSFET3 is biased to a fixed value by the DC power source 4. Further, the absolute value ¦V2-VGST¦ of the difference between the gate bias value V2 and gate-drain threshold value VGST of the MOSFET3 is set larger than the absolute value ¦V1¦ of the voltage V1 of the DC power source.

摘要翻译： 目的：为了获得MOSIC实现的鉴​​频器，具有简单的电路结构，并且通过提供电容器，MOSFET和转换开关来消除对电抗元件等外部元件的需要。 构成：提供具有容量C，MOSFET3和转换开关电路5的电容器1。 转换开关5接收FM信号Sf，以与信号的频率成正比的频率重复地交替第1和第2状态; 电容器1连接到第二级的直流电源2和第二级的MOSFET3的源极S. MOSFET3的栅极通过DC电源4被偏置到固定值。此外，MOSFET3的栅极偏置值V2和栅极 - 漏极阈值VGST之间的差的绝对值| V2-VGST|被设定得更大 直流电源的电压V1的绝对值| V1 |。

公开(公告)号：JPS59122002A

公开(公告)日：1984-07-14

申请号：JP23232182

申请日：1982-12-27

申请人： Toshiba Corp

发明人： NAGASHIMA YOSHITAKE

IPC分类号： H03D3/00

CPC分类号： H03D3/00

摘要： PURPOSE:To obtain a frequency discriminator which is MOSIC-implemented, has simple circuit constitution, and eliminates the need for an external element such as a reactance element by providing a charge transfer element and a driving circuit which operates this element at the frequency of an FM signal. CONSTITUTION:The charge transfer element 1 has a semiconductor substrate 4 and a source area 5 and a drain area 6 are formed on the surface 4a of the substrate 4. Further, electrodes 7-9 which adjoin to one another are provided on the substrate surface 4a between the areas 5 and 6 with an insulating film 10 between. The driving circuit 2 receives an FM signal Sf and drives the source electrode 5 and gate electrode 9 at a frequency equal to or proportional to the frequency of the FM signal Sf. A constant voltage is impressed between the electrodes 7 and 8. Those charge transfer element 1 and driving circuit 2 are provided to obtain the frequency discriminator which is MOSIC-implemented, has the simple circuit constitution, and requires no external element such as a reactance element.

摘要翻译： 目的：为了获得MOSIC实现的鉴​​频器，具有简单的电路结构，并且通过提供电荷转移元件和驱动电路来消除对诸如电抗元件的外部元件的需要，该驱动电路以 FM信号。 构成：电荷转移元件1具有半导体基板4，并且在基板4的表面4a上形成有源极区域5和漏极区域6.此外，在基板表面上设置有彼此相邻的电极7-9 在区域5和6之间具有绝缘膜10之间的4a。 驱动电路2接收FM信号Sf，并以与FM信号Sf的频率成比例的频率驱动源电极5和栅电极9。 在电极7和8之间施加恒定的电压。这些电荷转移元件1和驱动电路2被提供以获得MOSIC实现的鉴​​频器，具有简单的电路结构，并且不需要诸如电抗元件的外部元件 。

公开(公告)号：JPS58201487A

公开(公告)日：1983-11-24

申请号：JP8521482

申请日：1982-05-20

申请人： Toshiba Corp

发明人： NAGASHIMA YOSHITAKE

IPC分类号： H04N9/79 ,  H04N9/84 ,  H04N9/88

CPC分类号： H04N9/7917 ,  H04N9/7908 ,  H04N9/84 ,  H04N9/88

摘要： PURPOSE: To eliminate a crosstalk component included in a chrominance signal surely, by delaying a delayed signal by one horizontal scanning period further by other one horizontal scanning period, separating the chrominance signal and a luminance signal from this delayed signal and using the chrominance and the luminance signal separated at dropout period of a reproducing signal.
CONSTITUTION: When a dropout is caused during the reproduction of a magnetic tape 1 next, a dropout detecting circuit 6 detects it and switches 7, 9 are changed over. Since a signal 1H before is stored in a delay circuit 14 and a signal further 1H before, i.e., 2H before is stored in a delay circuit 15, only the luminance signal Y is separated from the signal 2H before at an LPF20, and this is inputted to a signal subtraction circuit 10 and a signal addition circuit 11 in place of the luminance signal Y from a luminance signal demodulating circuit 8. Similarly, only the chrominance -C is separated from the signal 2H before is separated at a BPF21 and this is inputted to the signal subtraction circuit 10 and the signal addition circuit 11 in place of the chrominance signal -C from a chrominance signal demodulating circuit 4.
COPYRIGHT: (C)1983,JPO&Japio

摘要翻译： 目的：通过将延迟信号延迟一个水平扫描周期进一步延迟另一个水平扫描周期，为了消除色度信号中包含的串扰分量，将该色度信号和亮度信号与该延迟信号分离，并使用色度和 在再生信号的压降周期分离亮度信号。 构成：接下来，在再现磁带1期间产生压降时，一个压差检测电路6检测它，并且开关7,9被切换。 由于1H之前的信号被存储在延迟电路14中，并且在之前的2H之前的信号进一步的1H被存储在延迟电路15中，所以在LPF20处仅将亮度信号Y与信号2H分离，并且这是 输入信号减法电路10和信号相加电路11代替来自亮度信号解调电路8的亮度信号Y.类似地，只有色度-C与在BPF21之前被分离的信号2H分离，并且这是 输入信号减法电路10和信号相加电路11代替色度信号解调电路4的色度信号C。

公开(公告)号：JPS5754406A

公开(公告)日：1982-03-31

申请号：JP12945380

申请日：1980-09-18

申请人： Toshiba Corp

发明人： NAGASHIMA YOSHITAKE

IPC分类号： H03D3/26 ,  H03D3/00

CPC分类号： H03D3/00

摘要： PURPOSE:To obtain a small sized FM wae-detection circuit requiring no adjustment, by connecting an AM wave-direction circuit to the poststage of a CCD filter and determining the center frequency of FM detection through the selection of a delay time by clock frequency of CCD and number of bits. CONSTITUTION:A part of an input signal 11 is given to a coefficient circuit 13, and a part of other parts is given to a coefficient circuit 15 via a CCD 12, other parts are given to a coefficient circuit 16 via a CCD 14 and the output of the coefficient circuits is summed 17. The coefficients K1, K3 of the circuits 13, 16 are both at ''x1'', and a coefficient K2 of the circuit 15 is at ''x2''. The CCD is driven with clocks having a specified number of bits N and frequency fk and has delay time T=N/ fk. With the constitution, an FM signal in angular velocity omega of carrier is inputted, and when the frequency changes by + or -DELTAomega to the center frequency, the transfer function of the circuit is about 2(1+ or -DELTAomega) to obtain an AM signal 18 proportional to the DELTAomega. When this output 18 is AM-detected 2, an FM detection signal to the FM input is obtained, no adjustment is required, no variance due to the change in the center frequency and the size can be made small.

摘要翻译： 目的：为了获得不需要调整的小尺寸FM水平检测电路，通过将AM波导电路连接到CCD滤波器的后级，并通过选择延迟时间来确定FM检测的中心频率，时钟频率为 CCD和位数。 构成：输入信号11的一部分被提供给系数电路13，并且其他部分的一部分经由CCD 12被提供给系数电路15，其他部分经由CCD 14被提供给系数电路16，并且 系数电路的输出相加17.电路13,16的系数K1，K3均为“x1”，电路15的系数K2为“x2”。 CCD由具有指定位数N和频率fk的时钟驱动，具有延迟时间T = N / fk。 通过该结构，输入载波的角速度ω的FM信号，当频率以+或-DELTAomega改变为中心频率时，电路的传递函数为约2（1+或-DELTAomega），以获得 AM信号18与DELTAomega成比例。 当该输出18被AM检测到2时，获得到FM输入的FM检测信号，不需要调整，不会由于中心频率的变化而导致的变化和尺寸变小。