Signal phase discriminating method in state transferring sequential logic
Title：
Signal phase discriminating method in state transferring sequential logic
Application Number：
 01142025
Application Date：
 2001/09/07
Announcement Date：
 2002/04/17
Pub. Date：
 2003/12/17
Publication Number：
 1345123
Announcement Number：
 1131592
Grant Date：
Granted Pub. Date：
 2003-12-17
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 H03L 7/00, H03L 7/08
Applicant(s)：
 Qinghua Univ.
Inventor(s)：
 Pang Hao, Wang Zanji
Key Words：
 Signal, phase discriminating method, state transferring, sequential logic
Abstract：
 The invention relates to a phase discrimination method for signal of sequential logic of state transition. The delayed output signals u1' and u2' are obtained, after the two square wave pulse sequence signals u1 and u2 to be phase discriminated being delayed Tn time respectively. Based on the states of u1 and u1', a signal el (also e2) can be obtained by Boolean calculation. Judging the rise edge or the fall edge of ul obtains signal el. Based on el, e2 and the states of 'up' and 'down' of phase discriminated output signal, a group of output signal up' and down' and produced by Boolean calculation of converting phase discriminated. The signals up' and down' are latched once in each interval time Ts. The latched signals are the final phase discriminated output signals 'up' and 'down'. The invention provides features of simple structure, clear meaning of intermediate signal, thus improving the stability and reliability in processing of phase discrimination.

 
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