Xerox Corporation

Ngaiman Chau

John W Wu

Eugene J Mar

Neng-Tze Yang

In a high-density VLSI NMOS semiconductor such as a ROM, a voltage sensing mode amplifier in the output thereof, operative to sense relatively very low input signal swing bit read signals from the ROM with relative insensitivity to fabrication process variation. The structure includes a common gate amplifier for receiving the ROM signal, a very sensitive reference voltage circuit, a two-stage differential digital switching module operative to compatively receive the common gate and voltage reference signals to effectively distinguish relatively weak bit signals as read from the high-density VLSI ROM.

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Flintridge, CA, United States of America

Ngaiman Chau