Clock signal generation circuit

Details Clock signal generation circuit Clock signal generation circuit

2011-03-22

2011-03-22

Luu, An T (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Clock or pulse waveform generating

C327S298000, C327S172000

Reexamination Certificate

active

07911252

ABSTRACT:
A clock signal generation apparatus includes a clock signal generation circuit generating a plurality of clock signals, and a self-test circuit measuring a phase difference of one pair of clock signals. The self-test circuit includes a clock signal selection circuit selecting the pair of clock signals among the plurality of clock signals, a phase detection circuit generating a phase difference pulse signal, a test signal generation circuit generating a test signal having a frequency which is lower than the phase difference pulse signal, and a counter circuit counting the pulse number of the test signal.

REFERENCES:
patent: 7327179 (2008-02-01), Sawyer et al.
patent: 7528640 (2009-05-01), Huang et al.
patent: 2007/0076832 (2007-04-01), Matsudera
patent: 2006-211208 (2006-08-01), None
patent: 2007-102483 (2007-04-01), None

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