Impedance adjusting circuit

Details Impedance adjusting circuit Impedance adjusting circuit

2011-06-07

2011-06-07

Tan, Vibol (Department: 2819)

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Bus or line termination

C326S086000, C326S087000, C327S108000

Reexamination Certificate

active

07956638

ABSTRACT:
An impedance adjusting circuit that includes an external terminal to which an external resistor is connected, a first transistor array of a first conductivity type that is connected in parallel between the external terminal and a first power supply terminal and changes a voltage of the external terminal by adjusting an impedance in response to a first control signal, a second transistor array of a second conductivity type that is connected in parallel between the external terminal and a second power supply terminal and changes the voltage of the external terminal by adjusting the impedance in response to a second control signal, and a control circuit that specifies the first control signal according to a comparison result between the voltage of the external terminal and a reference voltage and specifies the second control signal in a different period from a period to specify the first control signal.

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patent: 7719309 (2010-05-01), Santurkar et al.
patent: 7741855 (2010-06-01), Jao
patent: 2008/0100334 (2008-05-01), Kim et al.
patent: 2000-59202 (2000-02-01), None

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