Integrated circuit and method for receiving and transmitting signals of different frequency bands
AssigneeAvago Technologies Wireless IP (Singapore) Pte. Ltd.
InventorsMichael Louis Frank, John A. Swenson
Life of this patent
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Abstract
An integrated circuit and method for receiving and transmitting signals of different frequency bands utilizes a switching device on a bypass current path to selectively route incoming and outgoing signals by circumventing a capacitive device on a receive signal path. The bypass current path is used to selectively conduct current through a variable resistance device on a transmit signal path to transmit or block signals through the variable resistance device.
Claims20
An integrated circuit for receiving and transmitting signals of different frequency bands comprising:
- a transmit signal path connected to an intersecting node, the transmit signal path being used to transmit outgoing signals of at least one frequency band;
- a variable resistance device on the transmit signal path;
- a receive signal path connected to the intersecting node, the receive signal path being used to receive incoming signals of at least one frequency band;
- a capacitive device on the receive signal path;
- a bi-directional signal path connected to the intersecting node and a receive-and-transmit terminal;
- a bypass path that circumvents the capacitance device on the receive signal path;
- and
- a switching device on the bypass path to control resistance through the bypass path.
An integrated circuit for receiving and transmitting signals of different frequency bands comprising:
- an amplifier on a first signal path to provide outgoing signals of at least one frequency band;
- an output matching network connected in series with the amplifier on the first signal path;
- a diode connected in series with the output matching network;
- a capacitor on a second signal path connected to the first signal path;
- a transmission line connected in series with the capacitor on the second signal path;
- and
- a switching device connected on a third signal path that circumvents the capacitor.
A method for receiving and transmitting signals of different frequency bands, the method comprising:
- receiving incoming signals of at least one frequency band;
- filtering the incoming signals based on frequency;
- and
- selectively routing the incoming signals through a receive signal path for processing, including circumventing a capacitive device on the receive signal path to conduct current through a variable resistance device on a transmit signal path connected to the receive signal path to prevent the incoming signals from traveling through the transmit signal path.
Dependencies are inferred from the claim text.