Semiconductor integrated circuit having logic gates

Details Semiconductor integrated circuit having logic gates Semiconductor integrated circuit having logic gates

1991-01-22

1995-02-07

Westin, Edward P.

Electronic digital logic circuitry

Function of and, or, nand, nor, or not

Decoding

326105, 326 36, H03K 1923

Patent

active

053878272

ABSTRACT:
A semiconductor integrated logic circuit is provided which includes a plurality of logic gates each having a first input terminal for respectively receiving first input signals, wherein each of the logic gates is coupled to a common node. In one embodiment, first and second switching elements are also coupled to the common node. The first and second switching elements are both coupled to a second input terminal for receiving a second input signal which is common to the plurality of logic gates, and both operate complementary to one another in response to the second input signal. This arrangement is particularly effective for decoders in semiconductor memory circuits which use a common NMOS to receive one input for a plurality of logic decoder gates. An improved read/write arrangement is also provided for semiconductor memory circuits which includes circuitry to prevent connection of a common read line to the data lines during the writing operation. This enhances the writing speed by removing the load of the common read line during writing.

REFERENCES:
patent: 4091293 (1978-05-01), Ando
patent: 4724341 (1988-02-01), Yamada et al.
patent: 4758744 (1988-07-01), Plus
patent: 5001367 (1991-03-01), Vinal

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