Apparatus and method for differential comparison of digital word

Details Apparatus and method for differential comparison of digital word Apparatus and method for differential comparison of digital word

1997-06-25

1999-01-19

Yoo, Do Hyun

Static information storage and retrieval

Read/write circuit

Including signal comparison

36518911, 365191, 365203, 365207, G11C 700

Patent

active

058620850

ABSTRACT:
A circuit for comparing a first digital word to a second digital word includes a precharge circuit to generate an initial match signal, an initial inverse match signal, and a virtual ground signal in response to an input clock signal and an inverse input clock signal. Each comparison circuit of a set of comparison circuits generates a computed match signal and a computed inverse match signal based upon a selected bit of the first digital word and a corresponding selected bit of the second digital word. A signal differential sensing circuit derives a match signal for the first digital word and the second digital word based upon the virtual ground signal, the input clock signal, the computed match signal, and the computed inverse match signal.

REFERENCES:
patent: 5550774 (1996-08-01), Brauer et al.
patent: 5572467 (1996-11-01), Ghasser et al.
patent: 5621677 (1997-04-01), Jones

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