Bi-directional impedance matching circuit

Details Bi-directional impedance matching circuit Bi-directional impedance matching circuit

2005-02-01

2005-02-01

Tan, Vibol (Department: 2819)

Electronic digital logic circuitry

Interface

Current driving

C326S030000, C326S056000, C326S090000, C326S058000, C327S108000

Reexamination Certificate

active

06850091

ABSTRACT:
The present invention provides a bi-directional impedance matching integrated circuit which is couplable through an interface to a channel for signal transmission and reception. The invention includes a first switchable impedance and a second switchable impedance having a respective output impedance and input impedance substantially equal to a channel impedance. An impedance controller is capable of coupling the first switchable impedance to the interface in response to a transmit control signal, coupling the second switchable impedance to the interface in response to a receive control signal, and further capable of uncoupling the first switchable impedance and the second switchable impedance from a power supply and from a ground potential in response to a low power control signal. A mode selector is utilized to provide the transmit control signal, the receive control signal, and the low power control signal.

REFERENCES:
patent: 5602494 (1997-02-01), Sundstrom
patent: 6166563 (2000-12-01), Volk et al.
patent: 6690191 (2004-02-01), Wu et al.

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