| 摘要 |
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.
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