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    • 96. 发明公开
    • Method and apparatus for providing resampling function in a modulus prescaler of a frequency source
    • 在einem中的Verfahren und Vorrichtungfüreine Neuabtastung Frequenzvorteiler
    • EP1294100A2
    • 2003-03-19
    • EP02256053.6
    • 2002-08-30
    • Nokia Corporation
    • Salmi, MikaSvard, Mikael
    • H03K21/08
    • H03K21/40H03K21/08H03L7/193
    • A resampling technique is used to reduce the noise and improve the signal quality in the output of a prescaler circuit (10). The resampling of the output of a last frequency divider stage is accomplished using at least one flip/flop (FF) (e.g., a D-type FF 18) that is clocked by a signal obtained from the input of the prescaler. This reduces or eliminates the noise caused by edge jitter in the output of the prescaler, as well as the effect of spurious signals generated by the prescaler. These teachings can be used in integer N PLLs and in fractional N PLLs, as well as in single and programmable dual or multi-modulus prescalers. Using this technique the current consumption of the prescaler frequency dividers (12, 14, 16) need not be increased in an effort to reduce the prescaler noise., thereby conserving current in battery powered and other applications.
    • 重采样技术用于降低噪声并提高预分频器电路输出中的信号质量(10)。 使用由从预分频器的输入获得的信号计时的至少一个触发器(FF)(例如,D型FF18)来实现最后一个分频器级的输出的重新采样。 这可以减少或消除由预分频器的输出中的边沿抖动引起的噪声,以及预分频器产生的杂散信号的影响。 这些教导可用于整数N个PLL和分数N个PLL,以及单个和可编程的双模或多模预分频器。 使用这种技术,不必增加预分频器分频器(12,14,16)的电流消耗,以减少预分频器噪声,从而节省电池供电和其他应用中的电流。
    • 100. 发明公开
    • Sequential selection circuits
    • Sequentielle Auswahlschaltungen。
    • EP0162605A1
    • 1985-11-27
    • EP85302931.2
    • 1985-04-25
    • SONY CORPORATION
    • Shionoya,Toshio c/o Sony Corporation
    • G09G3/28H03K5/153H03K5/26H04N3/14
    • G09G3/296G09G3/293H03K5/15093H03K21/40
    • @ A sequential selection circuit for selecting a series of circuits, elements, electrodes or other items over a long period, to activate them sequentially one by one for a short period, comprises a shift register (10) which has a number of shift stages corresponding to the total number that is to be selected for sequentially shifting a single input pulse in response to clock pulses (H) corresponding to the short period. A counter (11) counts the clock pulses (H) so as to generate a pulse output (Pi when a count reaches the total selection number. An input circuit (G1,G2.G3) generates an input pulse (V,) for the shift register (10) in accordance with the pulse output (P) from the counter (11) and a pulse (V) corresponding to the long period. A reset circuit (G1) resets the counter (11) in accordance with the clock pulse (H) and the pulse (V) corresponding to the long period. With such arrangement, when the pulse (V) corresponding to the long period is not generated, the counter (11) will not operate and an effective input pulse (V,) to the shift register (10) will not be generated. Therefore, the shift register (10) will not sequentially read erroneous inputs and a plurality of shift stage outputs will not be generated at the same time. In this manner, the selected circuits, elements, electrodes or other items and drive circuitry and a power supply will be prevented from being damaged.
    • 一种用于长时间选择一系列电路,元件,电极或其他物品的顺序选择电路,用于在短时间内逐个激活它们,包括移位寄存器(10),其具有对应于 响应于对应于短周期的时钟脉冲(H),顺序移位单个输入脉冲而被选择的总数。 当计数达到总选择数时,计数器(11)对时钟脉冲(H)进行计数,以产生脉冲输出(P)。 输入电路(G1,G2,G3)根据来自计数器(11)的脉冲输出(P)和对应于长周期的脉冲(V)产生用于移位寄存器(10)的输入脉冲(V1) 。 复位电路(G1)根据时钟脉冲(H)和对应于长周期的脉冲(V)来重置计数器(11)。 通过这样的配置,当不产生对应于长周期的脉冲(V)时,计数器(11)将不工作,并且不会产生对移位寄存器(10)的有效输入脉冲(V1)。 因此,移位寄存器(10)不会顺序地读取错误的输入,并且不会同时产生多个移位级输出。 以这种方式,将防止所选择的电路,元件,电极或其它物品以及驱动电路和电源被损坏。