Semiconductor device with termination resistance adjusting...

Details Semiconductor device with termination resistance adjusting... Semiconductor device with termination resistance adjusting...

2007-07-17

2007-07-17

Cho, James H. (Department: 2819)

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Bus or line termination

C326S033000

Reexamination Certificate

active

11215039

ABSTRACT:
A semiconductor device includes a transmitter, a termination resistance adjusting section, a transmitter control section and a control signal generating section. The transmitter has two output terminals and operates based on a control current. The termination resistance adjusting section is connected with the output terminals of the transmitter and applies a termination resistance adjusted in response to a control signal to each of the output terminals of the transmitter. The transmitter control section supplies the control current to the transmitter in response the control signal. The control signal generating section compares a first voltage corresponding to an external resistance and a second voltage corresponding to an internal resistance whose precision is lower than that of the external resistance, and outputs the control signal to the termination resistance adjusting section and the transmitter control section based on the comparing result.

REFERENCES:
patent: 6545522 (2003-04-01), Mughal et al.
patent: 6573746 (2003-06-01), Kim et al.
patent: 6756812 (2004-06-01), Nagano et al.
patent: 6762620 (2004-07-01), Jang et al.
patent: 6828820 (2004-12-01), Ohno
patent: 2003298395 (2003-10-01), None
patent: 200432721 (2004-01-01), None

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