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此数字式脉冲宽度鉴别器是能可靠地检测出0.15～0.8μs 脉宽的一种电路,用作抗干扰的一种措施。用两块 T458B 移位寄存器作为对输入信息的移位之用,用三级 T065作为17~(Mc)振荡器以产生 T458B 的移位脉冲,移位脉冲的频率是根据所需要检测出的脉冲最窄宽度决定来的,移位寄存器的位数是根据所需要检测出的脉冲最宽宽度来决定的。为了抑制宽度较窄的波和太宽的其他杂波,将输入信息的前沿至后沿这段时间计数,然后再通过逻辑判断,只允许
This digital pulse width discriminator is a circuit that can reliably detect the pulse width of 0.15 ~ 0.8μs, as a measure of anti-interference. Two T458B shift registers are used for the shift of the input information. Three stages of T065 are used as the 17 ~ (Mc) oscillator to generate a shift pulse of T458B. The frequency of the shift pulse is determined based on the pulse to be detected The narrowest width of the decision, the number of bits in the shift register is determined according to the maximum width of the pulse to be detected. In order to suppress the narrower width of the wave and other clutter is too wide, the front of the input information to the back along this period count, and then through the logic to judge, only allowed