Integrated transmitter/receiver switch with impedance matching network

A transmitter/receiver (T/R) interface circuit comprising:

• a power amplifier interface including:
• a first transistor for transmitting a positive differential signal to a first antenna connection;
• and
• a second transistor for transmitting a negative differential signal to a second antenna connection;
• an integrated T/R switch including:
• a first inductor having a first terminal and a second terminal connected between the first and second antenna connections, respectively;
• a first capacitor having a first terminal and a second terminal, the first terminal being connected to the first terminal of the first inductor;
• a second capacitor having a first terminal and a second terminal, the first terminal being connected to the second terminal of the first inductor;
• and
• a third transistor connected between the second terminals of the first and second capacitors;
• and
• a low noise amplifier interface including:
• a second inductor having a first terminal and a second terminal connected to the second terminals of the first and second capacitors, respectively.

An integrated transmit/receive (T/R) switch for a wireless device, the wireless device having a first antenna connection and a second antenna connection for differential signal transmission/receipt, a power amplifier, and a low noise amplifier (LNA), the integrated T/R switch comprising:

• a first inductor having a first terminal and a second terminal connected between the first and second antenna connections, respectively;
• a first capacitor having a first terminal and a second terminal, the first terminal being connected to the first terminal of the first inductor;
• a second capacitor having a first terminal and a second terminal, the first terminal being connected to the second terminal of the first inductor;
• and
• a transistor connected between the second terminals of the first and second capacitors,
• wherein the second terminals of the first and second capacitors are connectable to a second inductor of the low noise amplifier for the wireless device, the first and second inductors and the first and second capacitors forming an L-C-L network.