Synchronous semiconductor memory device including internal clock

Details Synchronous semiconductor memory device including internal clock Synchronous semiconductor memory device including internal clock

1998-04-01

1999-08-17

Hoang, Huan

Static information storage and retrieval

Addressing

Sync/clocking

365194, 36518907, G11C 800

Patent

active

059403446

ABSTRACT:
In an internal clock signal generation circuit, a phase comparator for detecting phase difference between an external clock signal and an internal clock signal includes a transistor and a capacitor with respect to a signal line through which a clock signal corresponding to the external clock signal is transmitted, and a transistor and a capacitor with respect to a signal line through which a clock signal corresponding to the internal clock signal is transmitted. The rising timing of the signal having a more lagging phase of the signals of the two signal lines becomes more gentle. As a result, the phase difference is increased, and the phase comparator can compare the phase at high precision.

REFERENCES:
patent: 5252865 (1993-10-01), Davenport et al.
patent: 5592109 (1997-01-01), Notani et al.
patent: 5629897 (1997-05-01), Iwamoto et al.
patent: 5740115 (1998-04-01), Ishibashi et al.

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