Static information storage and retrieval – Read/write circuit – Flip-flop used for sensing
Reexamination Certificate
2005-03-08
2005-03-08
Nelms, David (Department: 2818)
Static information storage and retrieval
Read/write circuit
Flip-flop used for sensing
C365S207000, C365S214000, C365S154000
Reexamination Certificate
active
06865129
ABSTRACT:
A differential amplifier circuit includes a pair of first and second P-type transistors and a pair of first and second enhancement-mode N-type transistors. The first and second P-type transistors have respective gates each connected to the drain of the other P-type transistor, i.e., the first and second P-type transistors are cross-coupled. To respective gates of the first and second N-type transistors, a constant voltage VG (Vth≦VG≦Vdd) is applied. Currents of different magnitudes respectively are applied to first and second input terminals and the first and second N-type transistors generate voltages on first and second output terminals respectively, according to respective currents flowing through the first and second N-type transistors. The differential amplifier circuit is employed as a sense amplifier of a semiconductor memory device for use in reading data.
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Nelms David
Pham Lý Duy
Renesas Technology Corp.
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