Encoding method and apparatus for a dual mode super source...

Details Encoding method and apparatus for a dual mode super source... Encoding method and apparatus for a dual mode super source...

2006-06-27

2010-06-08

Ghebretinsae, Temesghen (Department: 2611)

Pulse or digital communications

Cable systems and components

Transformer coupling

C379S399010, C340S315000

Reexamination Certificate

active

07733965

ABSTRACT:
Encoding of a dual mode digital signal for transfer using a dual mode super source follower circuit to drive the signal across a pulse transformer is presented. The dual mode signal comprises data in one mode and power/control in the other mode. In the power/control mode the magnitude of the signal pulses are greater than the magnitude of the data pulses. Thus, the current sinking deficiencies of the super source follower may introduce waveform irregularities when transitioning from the high of the power pulse to the high of the data pulse. An encoding method described herein uses a return to zero scheme to avoid such waveform irregularities during power to data transitions.

REFERENCES:
patent: 3562720 (1971-02-01), Bernier
patent: 5384808 (1995-01-01), Van Brunt et al.
patent: 7167081 (2007-01-01), Strumpf et al.
patent: 2003/0128053 (2003-07-01), Haigh et al.
patent: 2004/0239487 (2004-12-01), Hershbarger

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