Transceiver with power-saving function and the method thereof
AssigneeRealtek Semiconductor Corp.
InventorJian Ru Lin
Life of this patent
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Abstract
The present invention provides a transceiver with power-saving function and the method thereof, in which when the network is on link-down status, the transmitter will enter the power-saving mode, and with an auxiliary circuit to provide a comfortable common-mode voltage and to present comfortable impedance matching to save the power consumption.
Claims16
A transceiver, which comprises:
- a transmitter, to transmit a transmitting signal over a transmission media;
- a receiver, to receive a receiving signal from the transmission media;
- an auxiliary circuit comprising a plurality of switches, coupled to the receiver, to selectively provide a common mode voltage for the transmission media when the transmitter is in a power-saving mode and to selectively remove the common mode voltage when the transmitter is not in the power-saving mode, wherein when the transceiver is not coupled with the transmission media, the transmitter is in the power-saving mode;
- and
- a control circuit configured to control the plurality of switches to control selective operation of the auxiliary circuit.
A power-saving method applied in a transceiver comprising a transmitter, a receiver, and an auxiliary circuit, the method comprising:
- determining if the transceiver is coupled with a transmission media;
- stopping the operation of the transmitter when the transceiver is not coupled with the transmission media;
- and
- selectively controlling a plurality of switches in the auxiliary circuit to provide a common mode voltage for the transmission media through the auxiliary circuit when the transceiver is not coupled with the transmission media, and selectively controlling the plurality of switches to remove the common mode voltage with the transceiver when the transmitter is in a normal mode;
- wherein the power consumption of the auxiliary circuit is less than that of the transmitter.
A power-saving method applied in a transceiver comprising a transmitter and a receiver, and an auxiliary circuit, the method comprising:
- disabling the transmitter when the transceiver enters a power-saving mode;
- and
- selectively controlling a plurality of switches to provide a common mode voltage for the transmission media through the auxiliary circuit when the transceiver is in the power-saving mode;
- wherein the power consumption of the auxiliary circuit is less than that of the transmitter.
Dependencies are inferred from the claim text.