Serial data link with automatic power down

Details Serial data link with automatic power down Serial data link with automatic power down

2002-04-19

2009-12-29

Ghayour, Mohammad H (Department: 2611)

Pulse or digital communications

Cable systems and components

C375S219000, C375S221000, C327S530000

Reexamination Certificate

active

07639745

ABSTRACT:
A serial data link (10) includes a transmitter (12) using a differential transmitter cell (20) to transmit data using differential signals and a receiver (14) using a differential receiver cell (22) to receive differential signals. When the transmitter (12) is in a power-down state, the differential signals from the differential transmitter cell (20) are set to an illegal state that is detected by the receiver cell (22). Upon detecting the illegal state, unnecessary circuitry in the receiver (14) is shut off or placed in a low power state to conserve energy. When data transmission resumes, the receiver cell (22) automatically restores power to its circuitry and resumes receiving data.

REFERENCES:
patent: 5687321 (1997-11-01), Allen
patent: 6114898 (2000-09-01), Okayasu
patent: 6259745 (2001-07-01), Chan
patent: 6317839 (2001-11-01), Wells
patent: 2002/0075051 (2002-06-01), Kuo
patent: 2002/0140504 (2002-10-01), Hasegawa
patent: 2003/0038676 (2003-02-01), Mages
patent: 2003/0185308 (2003-10-01), Schoenborn
patent: 199 59 982 (2001-06-01), None
patent: WO 00/31650 (2000-06-01), None

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