Electronic digital logic circuitry – Interface – Current driving
Reexamination Certificate
2005-04-05
2005-04-05
Chang, Daniel (Department: 2819)
Electronic digital logic circuitry
Interface
Current driving
C326S095000, C326S113000
Reexamination Certificate
active
06876230
ABSTRACT:
In a synchronous clocked full-rail differential logic circuit with single-rail logic and shut-off the complementary logic function of the prior art is replaced by a single transistor appropriately sized to provide the complementary output. Consequently, the synchronous clocked full-rail differential logic circuits with single-rail logic and shut-off of the invention are smaller, less complex and are capable of operating efficiently under heavy load conditions without the increased size and the significant reduction in speed associated with prior art full-rail differential logic circuits. The addition of the shut-off device provides a full-rail differential logic circuit with shut-off that does not experience the “dip” experienced by prior art full-rail differential logic circuits and is therefore more power efficient and is more resistant to noise than prior art full-rail differential logic circuits.
REFERENCES:
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patent: 5859548 (1999-01-01), Kong
patent: 6211704 (2001-04-01), Kong
Choe et al., “Dynamic Half Rail Differential Logic for Low Power”, IEEE 1997, pp. 1936 to 1939.
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Kong et al., “Charge Recycling Differential Logic for Low-Power Application”, ISSC96 secession 18, IEEE 0-780331962/98, 1998, pp. 302 to 448.
Choe et al., “Half Rail Differential Logic”, ISSCC97/Secession 25/Processors and Logic/Paper SP 25.6 IEEE 0-7803-3721-2/97, 1997, pp. 420 to 421, 337 and 489.
Won et al., “Modified Half Rail Differential Logic for Reduced Internal Logic Swing”, IEEE 0-7803-4455-3/98, 1998, pp. II-157 to II-160.
Kong et al., “Charge Recycling Differential Logic (CRDL) for Low-Power Application”, IEEE Journal of Solid-State Circuits, vol. 31, No. 9, Sep. 1996, pp. 1267-to 1276.
Chang Daniel
Gunnison McKay & Hodgson, L.L.P.
McKay Philip J.
Sun Microsystems Inc.
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