AC/DC coupling input network with low-power common-mode...

Details AC/DC coupling input network with low-power common-mode... AC/DC coupling input network with low-power common-mode...

2007-05-29

2007-05-29

Tran, Anh Q. (Department: 2819)

Electronic digital logic circuitry

Interface

Current driving

C326S090000, C326S127000

Reexamination Certificate

active

11036744

ABSTRACT:
An input network is provided within an integrated circuit for interfacing with signals produced by an external CML driver apparatus. The input network includes an input for receiving the signals, and this input is coupled to a terminating impedance, a DC attenuator and an AC attenuator. A common-mode correction loop is coupled to the AC attenuator and the DC attenuator for rejecting common-mode noise generated by the CML driver apparatus. The common-mode correction loop can also provide a common-mode voltage suitable for facilitating high-speed operation of low-voltage devices in the internal data path of the integrated circuit. An amplifier can be provided to compensate for signal attenuation in the input network.

REFERENCES:
patent: 6429678 (2002-08-01), Wong et al.
patent: 6654462 (2003-11-01), Hedberg

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