Reducing swing line driver

Electronic digital logic circuitry – Interface – Current driving

Reexamination Certificate

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Details

C326S086000

Reexamination Certificate

active

07084669

ABSTRACT:
An apparatus and method is disclosed for a limited swing line driver. A driver circuit generates a voltage that is transmitted to a unity gain voltage amplifier and a common source amplifier. A source-follower circuit in the voltage amplifier is activated when the voltage reaches a voltage threshold for an activating transistor, sending voltage to the output of the common-source amplifier, resulting in an output with a reduced swing. In an alternate embodiment, a variable-level reduced swing line driver is disclosed that uses a transistor as a variable resister to alter the threshold voltages and level control. A level control circuit is further disclosed that controls one or more variable-level line drivers.

REFERENCES:
patent: 5848101 (1998-12-01), Taylor
patent: 6323729 (2001-11-01), Sevenhans et al.
patent: 6414899 (2002-07-01), Afghahi et al.
patent: 6501306 (2002-12-01), Kim et al.

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