文章介绍了数字电路设计中的信号完整性问题，探讨了振铃、边沿畸变、反射、地弹、串扰和抖动等各种信号完整性问题的成因和抑制措施。
Signal integrity in the circuits design is discussed in this paper, and the major influencing factors are analyzed such as ringing, border distortion, reflection, bounce, crosstalk and jitter.
系统利用得到的来电号码，同存储的黑名单中的号码进行比较，判断是接通话机振铃线路，抑或控制模拟挂机电路挂机。
The system USES Caller ID, with the store's blacklist of Numbers, the judgement is connected to phone lines ringing, or simulated hang up control circuit hang up.
系统利用得到的来电号码，同存储的黑名单中的号码进行比较，判断是接通话机振铃线路，抑或控制模拟挂机电路挂机。
The system USES Caller ID, with the store's blacklist of Numbers, the judgement is connected to phone lines ringing, or simulated hang up control circuit hang up.
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