Row address strobe signal input buffer for preventing latch-up

Details Row address strobe signal input buffer for preventing latch-up Row address strobe signal input buffer for preventing latch-up

1990-02-27

1991-07-30

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307451, 307481, 3072965, H03K 1902, H03K 19096

Patent

active

050362275

ABSTRACT:
The row address strobe signal input buffer, or "chain pre-charge" circuit, includes a pad receiving a row address strobe signal (RAS). A Schmitt trigger receives the RAS signal from the pad, and is responsive to a start-up signal. A control section responds to the start-up signal and the output thereof is connected to the output of the Schmitt trigger. A NAND gate and inverters are connected to the output of the control section. A first pre-charge circuit, connected between the pad and the Schmitt trigger, prevents a floating state at the time of initial power source voltage supply. A second pre-charge circuit, connected to an input of one of the inverters which provides the output of the row address strobe signal input buffer, also helps prevent the floating state.

REFERENCES:
patent: 4636661 (1987-01-01), Mahmud
patent: 4763023 (1988-08-01), Spence
patent: 4939394 (1990-07-01), Hashimoto

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