公开(公告)号：US4186345A

公开(公告)日：1980-01-29

申请号：US846445

申请日：1977-10-28

申请人： Kouji Marita ,  Takao Mogi

发明人： Kouji Marita ,  Takao Mogi

IPC分类号： G08C19/22 ,  H03J9/00 ,  H03J9/04 ,  H04N5/00 ,  H04Q9/14 ,  H01R13/50

CPC分类号： H03J9/04 ,  G08C19/22

摘要： A remote control system for selectively controlling a plurality of functions includes a receiver having a decoding circuit for decoding a command signal having alternating mark periods and space periods, the decoding circuit being responsive to the length of the space period for selecting the function to be controlled.

摘要翻译： 用于选择性地控制多个功能的遥控系统包括具有解码电路的接收机，用于解码具有交替标记周期和空间周期的命令信号，所述解码电路响应于用于选择要控制的功能的空间周期长度 。

公开(公告)号：US4130804A

公开(公告)日：1978-12-19

申请号：US716654

申请日：1976-08-23

申请人： Takao Mogi ,  Hisao Okada

发明人： Takao Mogi ,  Hisao Okada

IPC分类号： H03J7/18 ,  H03J5/02 ,  H03J7/28 ,  H04N5/44 ,  H04B1/06

CPC分类号： H03J5/0263

摘要： In a channel selecting apparatus for a television receiver having a tuner with a voltage-controlled, variablereactance device as its tuning element, and in which such tuning element has a non-linear relation between its control voltage and the resulting receiving frequency; a sweep pulse generator is operable for producing sweep pulses, a counter counts the sweep pulses for producing progressively changing binary codes corresponding to the changing counts of the counter and which represent respective control voltages for the variable reactance device, a digital-to-analog converter receives the binary codes and converts the same into the respective control voltages for the variable reactance device, and a circuit is provided for varying the period of the sweep pulses so that the rate of change of the receiving frequency is substantially uniform over the range of the progressively changing binary codes. Such circuit for varying the period of the sweep pulses is preferably operable by the binary codes so as to respond to the changes in the latter.

摘要翻译： 在具有调谐器的电视接收机的频道选择装置中，所述调谐器具有作为其调谐元件的电压控制变容器，并且其中所述调谐元件在其控制电压与所得到的接收频率之间具有非线性关系; 扫描脉冲发生器可操作用于产生扫描脉冲，计数器对扫描脉冲进行计数，以产生对应于计数器的改变计数的逐渐变化的二进制代码，并且其表示可变电抗装置的相应控制电压，数模转换器 接收二进制代码并将其转换成用于可变电抗装置的相应控制电压，并且提供用于改变扫描脉冲的周期的电路，使得接收频率的变化率在 逐渐改变二进制代码。 用于改变扫描脉冲的周期的这种电路优选地可以通过二进制码来操作，以便响应后者的变化。

公开(公告)号：US4127818A

公开(公告)日：1978-11-28

申请号：US740753

申请日：1976-11-10

申请人： Takao Mogi

发明人： Takao Mogi

IPC分类号： H03J5/02 ,  H03J7/02 ,  H03J7/06 ,  H04N5/44 ,  H04B1/16

CPC分类号： H03J5/0263 ,  H03J7/023

摘要： A method of and apparatus for tuning an electronic tuner of the type having a voltage-controlled tuning element to which a selected control voltage is applied, thereby tuning the electronic tuner to a corresponding frequency, the tuner additionally including an automatic fine tuning circuit which is operable even when a control voltage first is applied to the voltage-controlled tuning element. When the control voltage first is applied, generally it experiences a gradual increase in magnitude until its predetermined control voltage level is attained. The automatic fine tuning circuit may pull in a frequency corresponding to the instantaneous level of the control voltage during the gradual increase in magnitude thereof. To avoid tuning the electronic tuner to this pulled-in frequency, the selected control voltage is re-applied to the tuning element at a predetermined time subsequent to the initial application of such control voltage.In a preferred embodiment, the electronic tuner is a programmable tuner provided with a storage device wherein representations, such as digital representations, of desired frequencies are stored. The tuner is tuned to one of these frequencies by reading out a selected representation, converting the representation to a corresponding control voltage and then applying this voltage to the voltage-controlled tuning element. The automatic fine tuning operation serves to modify the read-out representation, and thus the converted control voltage, to correspond to a pulled-in frequency. The selected control voltage is re-applied to the tuning element by reading out once again the selected representation from the storage device.

摘要翻译： 一种用于调谐具有施加了所选择的控制电压的压控调谐元件类型的电子调谐器的方法和装置，从而将电子调谐器调谐到相应的频率，该调谐器还包括一个自动微调电路 即使当控制电压首先施加到压控调谐元件时也是可操作的。 当施加控制电压时，通常它经历幅度的逐渐增加，直到达到其预定的控制电压电平。 自动微调电路可以在其逐渐增加的幅度期间拉动对应于控制电压的瞬时电平的频率。 为了避免将电子调谐器调谐到该拉入频率，在初始施加这种控制电压之后的预定时间，所选择的控制电压被重新施加到调谐元件。

公开(公告)号：US4058772A

公开(公告)日：1977-11-15

申请号：US717477

申请日：1976-08-25

申请人： Takao Mogi ,  Akira Taki ,  Hiroshi Yamazaki

发明人： Takao Mogi ,  Akira Taki ,  Hiroshi Yamazaki

IPC分类号： H03J7/18 ,  H03J3/18 ,  H03J5/02 ,  H03J7/20 ,  H03M1/00 ,  H03M1/82 ,  H04N5/44 ,  H04B1/06

CPC分类号： H03J5/0263 ,  H03J3/185 ,  H03J5/0254 ,  H03M1/827

摘要： A method of and apparatus for converting a plural-bit digital signal to a pulse width modulated signal which, thereafter, can be filtered to derive an analog signal level corresponding to the value of the digital signal. A periodic timing signal is produced and each period thereof is divided into predetermined sections. The value of the digital signal is divided by a factor equal to the number of predetermined sections, and the divided digital signal is converted into a corresponding pulse width modulated signal during each of the timing sections. The pulse width of the pulse width modulated signal in selected ones of the timing sections is selectively increased by a predetermined amount in the event that the divided digital value is not an integral number. In particular, the number of such timimg sections wherein the pulse width of the pulse width modulated signal is increased is equal to the remainder obtained after the value of the digital signal is divided.

摘要翻译： 一种用于将多位数字信号转换为脉冲宽度调制信号的方法和装置，此后可以滤波以产生与数字信号的值对应的模拟信号电平。 产生周期性定时信号，并将其周期分成预定部分。 将数字信号的值除以等于预定部分的数量的因子，并且在每个定时部分期间将划分的数字信号转换成相应的脉宽调制信号。 在分割数字值不是整数的情况下，选定的定时部分中的脉冲宽度调制信号的脉冲宽度被选择性地增加预定量。 特别地，其中脉宽调制信号的脉冲宽度增加的这种定时部分的数量等于在数字信号的值被分割之后获得的余数。