Electronic digital logic circuitry – Interface – Current driving
Reexamination Certificate
2011-02-22
2011-02-22
Tan, Vibol (Department: 2819)
Electronic digital logic circuitry
Interface
Current driving
C326S083000, C326S115000, C326S121000, C326S127000, C327S108000, C327S112000
Reexamination Certificate
active
07893719
ABSTRACT:
A digital data transmitting device is disclosed having differential signaling circuitry, a current source controller and a pair of transistor-implemented current sources is disclosed. The current source controller generates a current source control signal based on a detected mode of operation of the differential signaling circuitry. The pair of transistor-implemented current sources selectively generate source currents to adjust the output voltage levels as the differential output terminals in response to the current source control signal. The digital data transmitting device may also include a current bulk biasing circuit that generates a current source bulk biasing signal such that when the differential signaling circuitry is in one mode of operation, the current source bulk biasing signal retards currents leakage across the pair of transistor-implemented current sources.
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Cho Junho
Lee Chihou
ATI Technologies ULC
Tan Vibol
Vedder Price P.C.
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