Method of using integrated transmitter and receiver front end module

Abstract

A method includes switching a receiver path network of a front-end module to a first matching mode in a receive mode. The method further includes switching a transmitter path network of the front-end module to a first resonance mode in the receive mode. The method further includes switching the transmitter path network to a second matching mode in a transmit mode. The method further includes switching the receiver path network to a second resonance mode in the transmit mode.

What is claimed is: 
     
         1 . A method comprising:
 switching a receiver path network of a front end module to a first matching mode in a receive mode;   switching a transmitter path network of the front end module to a first resonance mode in the receive mode;   switching the transmitter path network to a second matching mode in a transmit mode; and   switching the receiver path network to a second resonance mode in the transmit mode.   
     
     
         2 . The method of  claim 1 , wherein switching the receiver path network to the first matching mode comprises:
 reducing capacitance of a first switchable capacitance unit of the receiver path network.   
     
     
         3 . The method of  claim 2 , wherein switching the receiver path network to the first matching mode further comprises:
 increasing capacitance of a second switchable capacitance unit of the receiver path network.   
     
     
         4 . The method of  claim 1 , wherein switching the transmitter path network to the first resonance mode comprises:
 establishing a path to ground through an inductor of the transmitter path network.   
     
     
         5 . The method of  claim 4 , wherein switching the transmitter path network to the first resonance mode further comprises:
 reducing capacitance of a switchable capacitance unit of the transmitter path network.   
     
     
         6 . The method of  claim 1 , wherein switching the transmitter path network to the second matching mode comprises:
 biasing a first transistor of a power amplifier of the transmitter path network; and   inputting signals from a transmitter to a second transistor of the power amplifier.   
     
     
         7 . A method comprising:
 switching a receiver path network of a front end module to a first matching mode in a receive mode, wherein switching the receiver path network to the first matching mode comprises introducing a first series capacitor into the receiver path network;   switching a transmitter path network of the front end module to a first resonance mode in the receive mode, wherein switching the transmitter path network to the first resonance mode comprises introducing a second series capacitor into the transmitter path network;   switching the transmitter path network to a second matching mode in a transmit mode, wherein switching the transmitter path network to the second matching mode comprises removing the second series capacitor from the transmitter path network; and   switching the receiver path network to a second resonance mode in the transmit mode, wherein switching the receiver path network to the second resonance mode comprises removing the first series capacitor from the receiver path network.   
     
     
         8 . The method of  claim 7 , wherein introducing the first series capacitor into the receiver path network comprises opening a switch between a ground voltage and the first series capacitor. 
     
     
         9 . The method of  claim 7 , wherein introducing the second series capacitor into the transmitter path network comprises opening a switch between a ground voltage and the second series capacitor. 
     
     
         10 . The method of  claim 7 , wherein removing the first series capacitor into the receiver path network comprises closing a switch between a ground voltage and the first series capacitor. 
     
     
         11 . The method of  claim 7 , wherein removing the second series capacitor into the transmitter path network comprises closing a switch between a ground voltage and the second series capacitor. 
     
     
         12 . The method of  claim 7 , wherein switching the transmitter path network to the first resonance mode comprises opening a switch between a supply voltage and an inductor of the transmitter path network. 
     
     
         13 . The method of  claim 7 , wherein switching the transmitter path network to the second matching mode comprises closing a switch between a supply voltage and an inductor of the transmitter path network. 
     
     
         14 . The method of  claim 7 , wherein switching the transmitter path network to the first resonance mode comprises activating a transistor to electrically connect an antenna to a ground voltage through an inductor of the transmitter path network. 
     
     
         15 . A method comprising:
 introducing a first series capacitor into a receiver path network of a front end module in a receive mode;   introducing a second series capacitor into a transmitter path network of the front end module in the receive mode;   removing the second series capacitor from the transmitter path network in a transmit mode; and   removing the first series capacitor from the receiver path network in the transmit mode.   
     
     
         16 . The method of  claim 15 , wherein the introducing the first series capacitor into the receiver path network occurs prior to the introducing the second series capacitor into the transmitter path network. 
     
     
         17 . The method of  claim 15 , wherein the introducing the first series capacitor into the receiver path network occurs after the introducing the second series capacitor into the transmitter path network. 
     
     
         18 . The method of  claim 15 , wherein the removing the first series capacitor from the receiver path network occurs prior to the removing the second series capacitor from the transmitter path network. 
     
     
         19 . The method of  claim 15 , wherein the removing the first series capacitor from the receiver path network occurs after the removing the second series capacitor from the transmitter path network. 
     
     
         20 . The method of  claim 15 , wherein introducing the first series capacitor into the receiver path network comprises placing the receiver path network in a matching mode, and introducing the second series capacitor into the transmitter path network comprises placing the transmitter path network in a resonance mode.