Pulse width modulating circuit
    21.
    发明授权
    Pulse width modulating circuit 失效
    脉宽调制电路

    公开(公告)号:US4275354A

    公开(公告)日:1981-06-23

    申请号:US5021

    申请日:1979-01-19

    摘要: First and second counters in a pulse width modulating circuit, whose respective outputs determine the trailing and leading edges of a pulse width modulated signal, count input clock pulses at a constant speed. The number of the pulses applied to the second counter during a cycle relative to the number of the pulses applied to the first counter is increased or decreased by one in response to a modulating pulse to change the counting phase of the second counter thereby changing the width of the pulse width modulated signal. Gates freeze the phases of the two counters at minimum and maximum pulse widths of the pulse width modulated signal to avoid abrupt jumps from minimum to maximum or vice versa.

    摘要翻译: 脉宽调制电路中的第一和第二计数器,其各自的输出确定脉冲宽度调制信号的后沿和前沿,以恒定速度计数输入时钟脉冲。 相对于施加到第一计数器的脉冲数的周期中施加到第二计数器的脉冲的数量响应于调制脉冲而增加或减少一个,以改变第二计数器的计数相位,从而改变宽度 的脉宽调制信号。 闸门以脉宽调制信号的最小和最大脉冲宽度冻结两个计数器的相位,以避免从最小到最大突然跳跃,反之亦然。

    Digital control bus system
    23.
    发明授权
    Digital control bus system 失效
    数字控制总线系统

    公开(公告)号:US4843289A

    公开(公告)日:1989-06-27

    申请号:US161316

    申请日:1988-02-23

    IPC分类号: H04B1/20 H04N5/44

    CPC分类号: H04N5/44 H04B1/205

    摘要: Digitally controllable ICs or function blocks in an electronic apparatus are connected through control bus lines, and a switch device is provided for disconnecting one of the digitally controllable ICs or function blocks from the control bus so that the control bus is not disabled when that one IC is turned off or is not occupied when the IC is operating in its internal processing mode. Therefore, communication between the remaining ICs can be maintained through the control bus.

    摘要翻译: 电子设备中的数字可控IC或功能块通过控制总线连接,并且提供开关装置用于将数字可控IC或功能块中的一个与控制总线断开,使得当该一个IC 当IC处于其内部处理模式时,它被关闭或不被占用。 因此,可以通过控制总线来保持剩余IC之间的通信。

    Integrated circuit device testable by an external computer system
    24.
    发明授权
    Integrated circuit device testable by an external computer system 失效
    集成电路设备可由外部计算机系统进行测试

    公开(公告)号:US4701870A

    公开(公告)日:1987-10-20

    申请号:US749825

    申请日:1985-06-28

    摘要: An integrated circuit device for an electronic equipment having an internal bus, the integrated circuit device comprising a plurality of input terminals, a switch circuit connected to the plurality of input terminals for selecting any one of a respective plurality of input signals via the plurality of input terminals, a switch control circuit for controlling the switch circuit to select any one of the input signals in dependence on a selection signal, an analog-to-digital converter for converting the selected input signal from the switch circuit into a corresponding serial digital signal, and a bus interface circuit connected to the internal bus for sending the serial digital signal from the analog-to-digital converter to the internal bus and for sending the selection signal from the internal bus to the switch control circuit.

    摘要翻译: 一种用于具有内部总线的电子设备的集成电路装置,所述集成电路装置包括多个输入端子,连接到所述多个输入端子的开关电路,用于经由所述多个输入端选择相应的多个输入信号中的任一个 端子,用于控制开关电路以根据选择信号选择任何一个输入信号的开关控制电路,用于将来自开关电路的所选择的输入信号转换成相应的串行数字信号的模数转换器, 以及连接到内部总线的总线接口电路,用于将串行数字信号从模数转换器发送到内部总线,并将选择信号从内部总线发送到开关控制电路。

    Apparatus for scrambling a television signal
    25.
    发明授权
    Apparatus for scrambling a television signal 失效
    用于扰乱电视信号的装置

    公开(公告)号:US4700388A

    公开(公告)日:1987-10-13

    申请号:US899798

    申请日:1986-08-25

    摘要: An apparatus for scrambling or encoding a television signal by inverting the latter signal in accordance with a control signal having a predetermined code pattern comprises a detector circuit for detecting a change in a picture scene of the television signal and generating an identification signal in response to detection of the scene change and code generator for generating a key code signal of specific pattern which indicates a particular program of the television signal. According to this invention, the control signal is formed in response to both the identification signal and the key code signal.

    摘要翻译: 一种用于通过根据具有预定编码模式的控制信号反相后一信号对电视信号进行加扰或编码的装置包括检测电路,用于检测电视信号的图像场景的变化并响应于检测产生识别信号 用于产生指示电视信号的特定节目的特定模式的键码信号的场景改变和码发生器。 根据本发明,响应于识别信号和键码信号两者形成控制信号。

    Video signal recording and reproducing system with automatic channel and
time selection
    26.
    发明授权
    Video signal recording and reproducing system with automatic channel and time selection 失效
    具有自动频道和时间选择的视频信号记录和再现系统

    公开(公告)号:US4626909A

    公开(公告)日:1986-12-02

    申请号:US491095

    申请日:1983-05-03

    摘要: A video recorder for automatically recording information being broadcast on at least one predetermined channel at a predetermined time comprises a tuner which tunes to any one of a plurality of channels received thereby and includes a channel selector actuable for selecting the predetermined channel, a recorder operable to record information broadcast on the channel to which the tuner is tuned, a timer actuable to cause operation of the recorder at the predetermined time, and a single, manually operable actuating member which simultaneously actuates the channel selector and the timer so that the recorder records the information broadcast on the predetermined channel at the predetermined time.

    摘要翻译: 用于自动记录在预定时间内在至少一个预定频道上广播的信息的视频记录器包括调谐器,其调谐到由此接收的多个频道中的任何一个信道,并且包括可用于选择预定频道的频道选择器, 在调谐器被调谐的频道上记录信息,一个致动的可在预定时间使记录器工作的定时器,以及一个单独的可手动操作的致动部件,其同时致动通道选择器和定时器, 在预定时间在预定频道上广播信息。

    Ladderless D/A converter
    27.
    发明授权
    Ladderless D/A converter 失效
    梯形D / A转换器

    公开(公告)号:US4139840A

    公开(公告)日:1979-02-13

    申请号:US764059

    申请日:1977-01-31

    申请人: Takao Mogi

    发明人: Takao Mogi

    摘要: This digital-analog converter receives a digital number and applies it to a counter capable of handling an n-bit binary capacity. When the counter counts to its full number, e.g. 1111 for a 4-bit capacity a writing signal generated in a control section causes the complement of the applied number to be written into the counter. The counter is then able to start counting from this complement number to the full (1111) number again. The control section then complements the written-in number back to the original number and counts up to the full number yet again. Thus, if the original binary number is 1100 and the reverse number, the counter counts 1100 and 0011 repetitively. At each count reversal, a flip-flop reverses, and a pulse corresponding in length to the original number is produced within each full count interval and that pulse is filtered by a low-pass filter to produce an analog signal corresponding to the original digital one.

    摘要翻译: 该数模转换器接收数字数字并将其应用于能够处理n位二进制容量的计数器。 当计数器计数到其全数时,例如 对于4位容量的1111,在控制部分中产生的写入信号使得所应用数字的补码被写入计数器。 然后,计数器可以再次从该补码开始计数到全(1111)。 然后,控制部分将写入号码补充回原始号码,并再次计数到完整号码。 因此,如果原始二进制数为1100并且反向数,则计数器重复计数1100和0011。 在每个计数反转时,触发器反相,并且在每个完整计数间隔内产生与原始数字长度对应的脉冲,并且该脉冲被低通滤波器滤波以产生对应于原始数字的模拟信号 。

    Method of and apparatus for tuning an AFT-controlled channel selecting
apparatus to a desired frequency
    28.
    发明授权
    Method of and apparatus for tuning an AFT-controlled channel selecting apparatus to a desired frequency 失效
    用于将AFT控制的频道选择装置调谐到所需频率的方法和装置

    公开(公告)号:US4079320A

    公开(公告)日:1978-03-14

    申请号:US743523

    申请日:1976-11-19

    申请人: Takao Mogi

    发明人: Takao Mogi

    CPC分类号: H03J5/0263

    摘要: A method of and apparatus for tuning an AFT-controlled channel selecting apparatus of the type having a storage device for storing digital representations corresponding to predetermined channel frequencies from which a selected representation is read out and converted to a control voltage which is applied to a controllable tuning element included in an electronic tuner. When the control voltage is applied, generally it experiences a gradual increase in magnitude until its predetermined control voltage level is attained. The automatic fine tuning (AFT) 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 such an unwanted pulled-in frequency, the AFT operation is carried out at a relatively slow rate when the tuning of the tuner approaches the frequency corresponding to the read out representation and then at a relatively fast rate when the tuner is tuned to a frequency that deviates from the desired frequency within a predetermined range.

    摘要翻译: 一种用于调谐具有存储装置的AFT控制的频道选择装置的方法和装置,所述存储装置用于存储对应于所选择的表示被读出的预定频道频率的数字表示,并将其转换为施加到可控制的控制电压 调谐元件包括在电子调谐器中。 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(AFT)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这种不想要的拉入频率,当调谐器的调谐接近对应于读出表示的频率,然后以相对较快的速率时,AFT操作以相对较慢的速率进行 调谐器被调谐到在预定范围内偏离期望频率的频率。

    Channel indicator device
    29.
    发明授权
    Channel indicator device 失效
    通道指示器

    公开(公告)号:US3962642A

    公开(公告)日:1976-06-08

    申请号:US479557

    申请日:1974-06-14

    CPC分类号: H03J1/045

    摘要: A channel indicator device is disclosed in which a tuner for achieving station selection between VHF and UHF band television broadcastings is provided in association with a single channel selection shaft of the tuner, a switch for band selection is also provided in connection with the channel selection shaft, and an indicator in the type of a plural-unit indication is provided, the indicator having a numeral corresponding to a selected channel in response to the channel selection and a code corresponding to a selected one of the VHF and UHF bands. The indicator has provided with a plural-unit indication member consisting of a plurality of indication elements to form a numeral "8".

    摘要翻译: 公开了一种频道指示装置,其中与调谐器的单个频道选择轴相关联地提供用于实现VHF和UHF频带电视广播之间的台站选择的调谐器,还提供了与频道选择轴相关联的用于频带选择的开关 并且提供多单元指示类型的指示符,所述指示符响应于频道选择具有对应于所选频道的数字,以及对应于所选VHF和UHF频段中的一个代码。 指示器具有由多个指示元件组成的多单元指示元件,以形成数字“8”。

    Digital control system for electronic apparatus
    30.
    发明授权
    Digital control system for electronic apparatus 失效
    电子仪器数字控制系统

    公开(公告)号:US4805085A

    公开(公告)日:1989-02-14

    申请号:US203616

    申请日:1988-06-06

    CPC分类号: G05B19/0421

    摘要: A digital control system for electronic apparatus employs an internal bus system and includes at least one master controller and a plurality of operational circuits connected via control bus lines so that, during normal operation of the electronic apparatus, the master controller can carry out predetermined control operations relative to the respective circuit blocks. During testing and/or adjustment, an auxiliary master control circuit is connected to the control bus lines in order to control the operational circuitry in place of the master control circuit, while holding the master control in the slave mode.

    摘要翻译: 电子装置的数字控制系统采用内部总线系统,并且包括至少一个主控制器和经由控制总线连接的多个操作电路,使得在电子设备的正常操作期间,主控制器可以执行预定的控制操作 相对于各个电路块。 在测试和/或调整期间,辅助主控制电路连接到控制总线,以便在将主控制保持在从模式的同时控制操作电路代替主控制电路。