Electronic digital logic circuitry – Interface – Current driving
Reexamination Certificate
2005-05-24
2005-05-24
Chang, Daniel D. (Department: 2819)
Electronic digital logic circuitry
Interface
Current driving
C326S026000
Reexamination Certificate
active
06897681
ABSTRACT:
The output of drivers which are used to drive the input signals to a multiplexed signal line are combined in a logic OR gate or a logic AND gate prior to connection to the input of the multiplexed line. The inactive state of drivers connected through a logic OR gate is set to 0 and the inactive state of drivers connected through a logic AND gate is set to 1. Bus contention between drivers is eliminated and the bandwidth of the multiplexed serial bus is increased because of the reduced wait time between driver transitions. Power dissipation in transition is reduced and the bus can have a programmable inactive state on a bus to allow for 1, 0 or High Z to indicate the inactive state.
REFERENCES:
patent: 5440247 (1995-08-01), Kaplinsky
patent: 5847580 (1998-12-01), Bapat et al.
patent: 5973506 (1999-10-01), Trimberger
patent: 5999013 (1999-12-01), Elliott
Gerald Williams, “Digital Technology”, 1981, Science Research Associates, Inc., Second Edition, p. 96, pp136-139.
Brady III Wade James
Chang Daniel D.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
Zindani Abdul
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