Semiconductor memory having a barrier transistor between a bit l

Details Semiconductor memory having a barrier transistor between a bit l Semiconductor memory having a barrier transistor between a bit l

1986-05-14

1988-12-27

Moffitt, James W.

Static information storage and retrieval

Read/write circuit

Precharge

365205, G11C 700

Patent

active

047945699

ABSTRACT:
In this invention, in a sensing circuit of a dynamic memory, barrier transistors are provided between the bit lines and the sensing amplifier. A circuit is provided that, on sensing and on data transfer, changes the gate potential of the barrier transistors so that during the sensing operation the barrier transistors are temporarily turned OFF, so that sensing can be carried out with high sensitivity, as the sensing system is not affected by the parasitic capacitance of the bit lines, while, on data transfer to the input/output lines, the gate potential of the barrier transistors is raised to a level greater than a value reached by adding the threshold value of the MOS transistors to the power source voltage, so that the conductance of the barrier transistors is increased, thereby speeding up the presensing of the input/output lines in the sensing circuit.

REFERENCES:
patent: 4138740 (1979-02-01), Itoh
patent: 4598387 (1986-07-01), Chuang et al.

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