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    • 99. 发明申请
    • Circuit for the temporary interruption of a sync signal
    • 用于暂时中断同步信号的电路
    • US20050017779A1
    • 2005-01-27
    • US10857598
    • 2004-05-27
    • Mauro Osvaldella
    • Mauro Osvaldella
    • G06F1/08G06F1/10H03K3/70H03K5/1252H03K3/02
    • G06F1/10G06F1/08H03K3/70H03K5/1252
    • A stop and release circuit of a sync signal, to temporarily suspend or interrupt the sync signal, the input sync signal having a plurality of leading edges and a plurality of trailing edges, the circuit including a first divider that receives the input sync signal and supplies a first signal made up of the sync signal divided by two starting from a leading edge, a second divider that receives the inverse input sync signal and supplies a second signal made up of the sync signal divided by two starting from a trailing edge, an exclusive OR circuit that receives the first signal and the second signal and that supplies an output sync signal, a stop circuit for the first divider and the second divider, and an asynchronous command signal generated by the stop circuit for the temporary interruption of the output sync signal.
    • 一种同步信号的停止和释放电路,用于暂时中止或中断同步信号,输入同步信号具有多个前沿和多个后沿,该电路包括接收输入同步信号并提供的第一分频器 由从前沿开始的同步信号除以2的第一信号,接收反向输入同步信号并提供由从后沿开始分频2的同步信号构成的第二信号的第二分频器, OR电路,其接收第一信号和第二信号,并且提供输出同步信号,用于第一分频器和第二除法器的停止电路以及由停止电路产生的用于暂时中断输出同步信号的异步命令信号 。
    • 100. 发明授权
    • Glitch free clock enable circuit
    • 无毛刺时钟使能电路
    • US5808486A
    • 1998-09-15
    • US842104
    • 1997-04-28
    • David Alan Smiley
    • David Alan Smiley
    • G06F1/08G06F1/10H03K3/70H03K5/13H03K5/00
    • H03K5/13G06F1/08G06F1/10H03K3/70
    • A clock enabling circuit that generates an output clock signal such that when the enable output signal changes to a logical false, the output clock signal returns to its steady-state value in a manner that does not produce any glitches, and preserves the duty cycle of the input clock. The circuit comprises a first D flip-flop that is positive-edge triggered, a second D flip-flop that is negative-edge triggered, and a two-input AND gate. The first flip-flop has the D input connected to a constant positive voltage, the positive-edge triggered clock input connected to the input clock signal, the Q output connected to the AND gate, and the Q-complement output connected to the asynchronous reset of the second flip-flop. The second flip-flop has the D input connected to the enable output signal, the negative-edge triggered clock input connected to the input clock signal, the Q output connected to the asynchronous reset of the first flip-flop, and the Q-complement output connected to the AND gate. The output of the AND gate is the output clock signal.
    • 一种时钟使能电路,其产生输出时钟信号,使得当使能输出信号变为逻辑假时,输出时钟信号以不产生毛刺的方式返回其稳态值,并且保持占空比 输入时钟。 电路包括正沿触发的第一D触发器,负沿触发的第二D触发器和双输入与门。 第一个触发器将D输入连接到恒定的正电压,正边沿触发的时钟输入连接到输入时钟信号,Q输出连接到与门,并且Q补码输出连接到异步复位 的第二个触发器。 第二个触发器将D输入连接到使能输出信号,负沿触发时钟输入连接到输入时钟信号,Q输出连接到第一个触发器的异步复位和Q-补码 输出连接到与门。 与门的输出是输出时钟信号。