True TTL output translator-driver with true ECL tri-state contro

Details True TTL output translator-driver with true ECL tri-state contro True TTL output translator-driver with true ECL tri-state contro

1987-11-20

1989-08-15

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307473, 307455, 307355, 307443, H03K 19092, H03K 1900, H03K 522, H03K 19086

Patent

active

048577766

ABSTRACT:
The present invention provdes a circuit for driving a TTL bus from an ECL circuit. The circuit of the present invention speeds up the "tri-state" to "active" transition by eliminating the need to pass the tri-state signal through a translator and buffer. A tri-state control circuit accepts true ECL input directly, thus eliminating the delay, power and density "cost" of the translator and buffer circuits. This circuit further improves the delay performance of tri-state/active transitions by restricting device saturation to low levels.

REFERENCES:
patent: 4518876 (1985-05-01), Constantinescu
patent: 4644194 (1987-02-01), Birrittella et al.
patent: 4677320 (1987-06-01), Hannington
patent: 4678944 (1987-07-01), Williams

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