Electronic digital logic circuitry – Signal sensitivity or transmission integrity – Bus or line termination
Reexamination Certificate
2011-03-29
2011-03-29
Tran, Anh Q (Department: 2819)
Electronic digital logic circuitry
Signal sensitivity or transmission integrity
Bus or line termination
C326S033000, C326S034000, C326S086000
Reexamination Certificate
active
07915913
ABSTRACT:
A termination resistance adjusting circuit includes a first termination resistor circuit, a second termination resistor circuit connected in parallel with the first termination resistor circuit, a resistor circuit for adjustment that adjusts resistances of the first and second termination resistor circuits, a first amplifier circuit that receives a first voltage determined by the resistor circuit for adjustment and a second voltage determined by a reference resistor connected externally, equalizes the first and second voltages, and outputs a resistance adjusting signal to the first and second termination resistor circuits, first and second terminals connected to the first and second termination resistor circuits respectively, and a second amplifier circuit that receives a voltage based on a common voltage of a differential signal supplied to the first and second terminals, and the first or second voltage, and equalizes the voltage based on the common voltage and the first or second voltage.
REFERENCES:
patent: 5559448 (1996-09-01), Koenig
patent: 6556039 (2003-04-01), Nagano et al.
patent: 6560290 (2003-05-01), Ahn et al.
patent: 2002/0175700 (2002-11-01), Nagano et al.
patent: 2003/0085736 (2003-05-01), Tinsley et al.
patent: 2002-344300 (2002-11-01), None
patent: 2003-204247 (2003-07-01), None
Renesas Electronics Corporation
Tran Anh Q
Young & Thompson
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