Static information storage and retrieval – Read/write circuit – Flip-flop used for sensing
Patent
1996-08-16
1998-06-09
Nelms, David C.
Static information storage and retrieval
Read/write circuit
Flip-flop used for sensing
36518905, G11C 700
Patent
active
057645809
ABSTRACT:
A semiconductor integrated circuit capable of preventing the excessive overdriving of sense amplifiers when the supply voltage fed thereto is raised. The integrated circuit has differential amplifiers for amplifying a potential difference on complementary signal lines, and a control circuit for generating a first driving control signal for supplying the differential amplifiers with a first driving voltage as an overdriving power supply therefor. The control circuit further generates a second driving control signal for supplying the differential amplifiers with a second driving voltage which is activated after the activated first driving control signal is deactivated and which is lower in level than the first driving voltage. The control circuit includes a MOS circuit as a delay circuit composed of MOS transistors for defining a time interval from the time the first driving control signal is activated until the second driving control signal is activated. With this arrangement, the period during which the overdriving voltage is applied is variable in dependence on the level of the supply voltage such that the overdrive period is relatively short if the supply voltage is high and relatively long if the supply voltage is low.
REFERENCES:
patent: 4980799 (1990-12-01), Tobita
patent: 5402042 (1995-03-01), Madsen
patent: 5457421 (1995-10-01), Tanabe
patent: 5546026 (1996-08-01), Lin et al.
patent: 5576644 (1996-11-01), Pelella
Nakamura et al., "FA14.2: A 29ns 64Mb DRAM with Hierarchical Array Architecture", 1995 IEEE Int'l Solid-State Circuits Conference.
Abe Koichi
Sukegawa Shunichi
Suzuki Yukihide
Takahashi Tsugio
Hitachi , Ltd.
Nelms David C.
Texas Instruments Incorporated
Tran Michael T.
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