Semiconductor device capable of selecting operation mode based o

Details Semiconductor device capable of selecting operation mode based o Semiconductor device capable of selecting operation mode based o

1997-06-23

2000-03-14

Lam, Tuan T.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

327159, 713501, G06F 104

Patent

active

060378131

ABSTRACT:
A semiconductor device which operates in synchronism with a first clock externally provided. The semiconductor device includes a clock-generation circuit generating a second clock which maintains a predetermined phase relation with the first clock, a check circuit for checking a frequency of the first clock based on at least one internal signal generated by the clock-generation circuit, and an internal circuit which switches an operation mode according to results of the checking.

REFERENCES:
patent: 4893271 (1990-01-01), Davis et al.
patent: 5463337 (1995-10-01), Lenowich
patent: 5727193 (1998-03-01), Takeuchi
patent: 5774701 (1998-06-01), Matsui et al.
patent: 5805003 (1998-09-01), Hsu

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