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    • 2. 发明申请
    • SIGNAL GENERATOR, SIGNAL GENERATION METHOD, AND NUMERICALLY CONTROLLED OSCILLATOR
    • 信号发生器,信号发生方法和数字控制振荡器
    • US20150311890A1
    • 2015-10-29
    • US14647471
    • 2013-11-26
    • NEC CORPORATION
    • Hiroyuki IGURA
    • H03K12/00H03K9/06G06G7/161G06G7/30G06G7/26G06G7/14
    • H03K12/00G06G7/14G06G7/161G06G7/26G06G7/30H03C2200/0029H03K9/06
    • A waveform conversion unit (42) of a numerically controlled oscillator has a cosine table (101) and a sine table (102) in which parameters for cosine wave and sine wave signal generation are stored, a correction mechanism (50) for generating correction values according to the phase of an inputted phase signal, an adder (111) for generating a cosine wave signal from a parameter in the cosine table (101) and a correction value, and an adder (112) for generating a sine wave signal from a parameter in the sine table (102) and a correction value. The correction mechanism (50) uses waveform data which is a kind of parabolic data and whose phase interval is more minute than the phase interval of the parameters in each table (101), (102) to generate correction values for correcting cosine wave and sine wave signals to be found by linear interpolation.
    • 数控振荡器的波形转换单元(42)具有余弦表(101)和存储余弦波和正弦波信号生​​成参数的正弦表(102),用于产生校正值的校正机构(50) 根据输入的相位信号的相位,从余弦表(101)中的参数产生余弦波信号的加法器(111)和校正值,以及用于从正弦波信号生​​成正弦波信号的加法器(112) 正弦表(102)中的参数和校正值。 校正机构(50)使用作为抛物线数据的波形数据,并且其相位间隔比每个表(101),(102)中的参数的相位间隔更加微小,以产生用于校正余弦波和正弦的校正值 波形信号可以通过线性插值来找到。
    • 6. 发明授权
    • Ramp generator
    • 斜坡发电机
    • US4176398A
    • 1979-11-27
    • US881848
    • 1978-02-27
    • Dennis G. Rider
    • Dennis G. Rider
    • G06G7/30H03K4/56H03K6/00G06J1/00H03K4/08
    • H03K6/00G06G7/30H03K4/56
    • Apparatus receiving step voltage inputs provides an output voltage that moves as a linear ramp from step to step. Each new input causes an amplifying circuit to connect a predetermined potential to an integrator, starting a new ramp. A comparator circuit receives voltages proportional respectively to the input and the ramp output, and when they become equal it stops the ramp. An inverter is automatically connected into the amplifying circuit when needed to change the polarity of the potential to the integrator, and thus to reverse the direction of the ramp. Manual and automatic adjusting and switching means control the operating sequences and parameters.
    • 接收步进电压输入的装置提供一个从一步到一步的线性斜坡移动的输出电压。 每个新的输入使得放大电路将预定电位连接到积分器,开始新的斜坡。 比较器电路接收与输入和斜坡输出成比例的电压,当它们相等时,它停止斜坡。 当需要将反相器自动连接到放大电路中以改变积分器的电位极性,从而反转斜坡的方向。 手动和自动调节和切换意味着控制操作顺序和参数。