Interface circuit and signal output adjusting method

Details Interface circuit and signal output adjusting method Interface circuit and signal output adjusting method

2008-03-07

2010-06-15

Lam, Tuan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C327S112000

Reexamination Certificate

active

07737736

ABSTRACT:
The problem to be solved by of this claimed application is solved by providing an interface circuit and a signal output adjusting method that are capable of adjusting amplitude of a transmission-side signal by taking attenuation of a transmission path into consideration. In a transmission-side circuit part of an interface circuit100, a repetitive signal111having constant amplitude is sent out to a transmission path123through an output buffer circuit117that is configured of a CML circuit at the time of testing. In a reception-side circuit part102, a determining circuit135compares the amplitude of the input signal131with each of a plurality of reference voltages Vref1to Vrefnin comparators1321to132nto obtain a comparison result. And, a voltage controlling circuit119of a transmission-side circuit part101makes the setting of the amplitude by appropriately controlling a constant current value of the CML circuit, thereby enabling the low consumption power to be realized.

REFERENCES:
patent: 7023242 (2006-04-01), Brand et al.
patent: 7215161 (2007-05-01), Nguyen
patent: 7460602 (2008-12-01), Clements et al.
patent: 2004/0177286 (2004-09-01), Gauthier et al.
patent: 2009/0108914 (2009-04-01), Zhang et al.
patent: 06-216680 (1994-08-01), None
patent: 2000-049588 (2000-02-01), None

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