Switchable supply and tunable load impedance power amplifier

A method for operating a transceiver to transmit data in a plurality of operating modes including a Wi-Fi mode and two or more different Bluetooth power modes, the method comprising:

• amplifying Bluetooth signals for wireless transmission, using a first amplifier, during the two or more different Bluetooth power modes;
• amplifying Wi-Fi signals for wireless transmission, using a second amplifier, during the Wi-Fi mode;
• and
• providing a different load impedance for each of the plurality of operating modes using a tunable load circuit including first and second parallel impedance paths and a number of shunt paths coupled to ground potential, wherein:
• the first and second parallel impedance paths comprise (i) a first impedance path including a first capacitor, one or more first transistors, and a second capacitor coupled in series between output terminals of the first and second amplifiers, and (ii) a second impedance path including a third capacitor and a fourth capacitor coupled in series between the output terminals of the first and second amplifiers;
• and
• the number of shunt paths comprise (i) a first shunt path including a second transistor coupled between ground potential and a common node of the third and fourth capacitors, and (ii) a second shunt path including a third transistor and a fifth capacitor coupled in series between ground potential and the common node.

A transceiver configured to transmit data in a plurality of operating modes including a Wi-Fi mode and two or more different Bluetooth power modes, the transceiver comprising:

• means for amplifying Bluetooth signals, using a first amplifier, for wireless transmission during the two or more different Bluetooth power modes;
• means for amplifying Wi-Fi signals, using a second amplifier, for wireless transmission during the Wi-Fi mode;
• and
• means for providing a different load impedance for each of the plurality of operating modes using a tunable load circuit including first and second parallel impedance paths and a number of shunt paths coupled to ground potential, wherein:
• the first and second parallel impedance paths comprise (i) a first impedance path including a first capacitor, one or more first transistors, and a second capacitor coupled in series between output terminals of the first and second amplifiers, and (ii) a second impedance path including a third capacitor and a fourth capacitor coupled in series between the output terminals of the first and second amplifiers;
• and
• the number of shunt paths comprise (i) a first shunt path including a second transistor coupled between ground potential and a common node of the third and fourth capacitors, and (ii) a second shunt path including a third transistor and a fifth capacitor coupled in series between ground potential and the common node.

A transceiver configured to transmit data in a plurality of operating modes, the transceiver comprising:

• a first amplifier configured to amplify first data signals;
• a second amplifier configured to amplify second data signals;
• an antenna coupled to the second amplifier;
• and
• a tunable load circuit, coupled between output terminals of the first and second amplifiers, configured to provide a different load impedance for each of the plurality of operating modes, the tunable load circuit comprising:
• a first impedance path including a first capacitor, one or more first transistors, and a second capacitor coupled in series between the output terminals of the first and second amplifiers;
• a second impedance path including a third capacitor and a fourth capacitor coupled in series between the output terminals of the first and second amplifiers;
• a first shunt path including a second transistor coupled between ground potential and a common node of the third and fourth capacitors;
• and
• a second shunt path including a third transistor and a fifth capacitor coupled in series between ground potential and the common node.