Static information storage and retrieval – Read/write circuit – Differential sensing
Patent
1991-09-30
1994-01-25
LaRoche, Eugene R.
Static information storage and retrieval
Read/write circuit
Differential sensing
365207, 307530, G11C 1300
Patent
active
052821684
ABSTRACT:
A random access memory device memorizes data bits in memory cells each implemented by field effect transistors arranged in a flip-flop configuration, and one of the data bits are read out to a pair of data signal lines in the form of a small difference in voltage level for increasing the magnitude of the small difference by means of a high-speed sense amplifier unit, wherein the small difference is stepped down through a pair of diode elements so that a pre-amplifying circuit implemented by bipolar transistors firstly increases the small difference with voltage levels at the anodes and cathodes of the diode elements, then the differential amplifying circuit implemented by bipolar transistors starts on increasing a differential voltage level at the output nodes of the pre-amplifying circuit so that the differential amplification is completed within a relatively short time period.
REFERENCES:
patent: 4553053 (1985-11-01), Ong et al.
patent: 4607172 (1986-08-01), Frederiksen et al.
patent: 4991141 (1991-02-01), Tran
LaRoche Eugene R.
Le Vu A.
NEC Corporation
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