Static information storage and retrieval – Read/write circuit – Differential sensing
Patent
1997-12-18
1999-09-14
Nguyen, Tan T.
Static information storage and retrieval
Read/write circuit
Differential sensing
365207, 327 52, G11C 700
Patent
active
059532769
ABSTRACT:
A fully-differential high speed differential amplifier is formed by four pairs of complementary MOS transistors arranged as inverters connected between a current source node and a current sink node. Current is coupled to the current source node from a positive supply voltage by one or a pair of PMOS current source transistors, and current is coupled from the current sink node to a negative supply voltage by one or a pair of NMOS currents sink transistors. Two of the complementary pairs of transistors receive respective input signals and generate respective output signals. The remaining two complementary pairs of transistors also receive respective input signals, but they generate bias control signals that are applied to the current source and sink transistors. Where a pair of current source and sink transistors are used, each current source and sink transistor receives its control signal from a respective complementary pair of transistors. The differential amplifier is entirely symmetrical and therefore provides improved common mode signal rejection and true differential outputs while still being able to operate at a high-speed.
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Nguyen Tan T.
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