Programmable logic device with limited signal swing

Details Programmable logic device with limited signal swing Programmable logic device with limited signal swing

1991-07-31

1993-02-16

Westin, Edward P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307468, 307530, 307548, H03K 19173, H03K 500

Patent

active

051873923

ABSTRACT:
A programmable logic device is described. The programmable logic device includes a plurality of memory cells, each having a drain, a source, a floating gate, and a control gate. A first bit line is coupled the drain of each of the plurality memory cells. The bit line provides a voltage level. A second bit line is coupled to the source of each of the plurality of memory cells. The programmable logic device further includes means for controlling the voltage level to swing between a first voltage state and a second voltage state. The controlling means receives current from the first bit line to clamp the voltage level to the first voltage state when the voltage level exceeds the first voltage state. The controlling means provides current to the first bit line and limits current flow of the first bit line to maintain the voltage level to the second voltage state when the voltage level exceeds below the second voltage state.

REFERENCES:
patent: 4617479 (1986-10-01), Hartmann et al.
patent: 4730275 (1988-03-01), Baskett
patent: 4785423 (1988-11-01), Skupnjak et al.
patent: 4833646 (1989-05-01), Turner
patent: 4899070 (1990-02-01), Ou et al.
patent: 4967395 (1990-10-01), Watanabe

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