Low noise transceiver
First Claim
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1. A transceiver comprising:
- a receiver coupled to receive a signal at a first node, the receiver establishing a desired common mode voltage at the first node;
circuitry coupled to establish the desired common mode voltage at a second node; and
the first and second nodes defining at least a portion of a low impedance path during a first operating mode for diverting a signal received at the first node away from the receiver, and the first and second nodes defining a high impedance path during a second operating mode for enabling the signal received at the first node to be provided to the receiver.
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Abstract
The present invention relates generally to a low noise transceiver. The transceiver establishes substantially identical common mode voltages at first and second nodes. A receiver is coupled to the first node for receiving signals. The first and second nodes are connected during a first operating mode to provide a low impedance path for diverting received signals away from the first node and disconnected during a second operating mode to enable the receiver to detect signals received at the first node.
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Citations
22 Claims
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1. A transceiver comprising:
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a receiver coupled to receive a signal at a first node, the receiver establishing a desired common mode voltage at the first node;
circuitry coupled to establish the desired common mode voltage at a second node; and
the first and second nodes defining at least a portion of a low impedance path during a first operating mode for diverting a signal received at the first node away from the receiver, and the first and second nodes defining a high impedance path during a second operating mode for enabling the signal received at the first node to be provided to the receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13)
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11. A communications apparatus comprising:
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a receiver coupled to receive a signal at a first node, the receiver establishing a desired common mode voltage at the first node;
an amplifier coupled to establish the desired common mode voltage at a second node;
a switch device connected between the first and second nodes, the switch device operating to connect the first and second nodes to provide a low impedance path during a first operating mode, and the switch operating to disconnect the first and second node during a second operating mode;
a transmitter that provides a transmitter output signal at a third node having a desired carrier frequency;
an antenna coupled between the first and third nodes; and
a low impedance path coupled to the second node for diverting current away from the first node during the first operating mode.
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14. A transceiver comprising:
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means for receiving a signal at a first node and for maintaining a common mode voltage at the first node;
means for maintaining a common mode voltage at a second node;
means for connecting the first and second nodes during a first operating mode and for disconnecting the first and second nodes during a second operating mode. - View Dependent Claims (15, 16, 17)
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18. A method to operate a transceiver, the method comprising:
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establishing a common mode voltage at a first node to which a receiver is coupled;
establishing the common mode voltage at a second node;
connecting the first and second nodes during a transmit operating mode to provide a low impedance path for propagating a transmission signal away from the first node; and
disconnecting the first and second nodes during a receive operating mode to enable a signal provided at the first node to be detected by the receiver. - View Dependent Claims (19, 20, 21, 22)
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Specification