Multiple-path amplifier with series component along inverter between amplifier outputs

A multiple-path amplifier comprising:

• a first amplifier with a first output terminal;
• a second amplifier with a second output terminal;
• and
• an impedance inverter line assembly electrically connected between the first and second output terminals, wherein the impedance inverter line assembly includes a first transmission line and a surface mount component connected in series between the first and second output terminals, wherein the first output terminal corresponds to a first intrinsic drain of a first power transistor with a first drain-source capacitance, the second output terminal corresponds to a second intrinsic drain of a second power transistor with a second drain-source capacitance, and the impedance inverter line assembly and the first and second drain-source capacitances provide an impedance inversion and a 90 degree phase difference between the first intrinsic drain to the second intrinsic drain.

An amplifier comprising:

• a first substrate with a mounting surface;
• a first power transistor die coupled to the mounting surface, wherein the first power transistor die includes a first transistor integrated within the first power transistor die, and wherein the first transistor includes a first drain terminal;
• a second power transistor die coupled to the mounting surface, wherein the second power transistor die includes a second transistor integrated within the second power transistor die, and wherein the second transistor includes a second drain terminal;
• and
• an impedance inverter line assembly electrically connected between the first and second output terminals, wherein the impedance inverter line assembly includes a first transmission line and a surface mount component connected in series between the first and second output terminals, wherein the surface mount component is selected from a surface mount capacitor, a surface mount inductor, and a second substrate to which a passive electrical component is coupled.

An amplifier comprising:

• a first substrate with a mounting surface;
• a first power transistor die coupled to the mounting surface, wherein the first power transistor die includes a first transistor integrated within the first power transistor die, and wherein the first transistor includes a first drain terminal;
• a second power transistor die coupled to the mounting surface, wherein the second power transistor die includes a second transistor integrated within the second power transistor die, and wherein the second transistor includes a second drain terminal;
• and
• an impedance inverter line assembly electrically connected between the first and second output terminals, wherein the impedance inverter line assembly includes a first transmission line and a surface mount component connected in series between the first and second output terminals, wherein the surface mount component is selected from a fixed-value capacitor, a fixed-value inductor, a tunable capacitor, a tunable inductor, and a tunable passive component network.

A module that houses at least a portion of a Doherty amplifier, the module comprising:

• a first substrate with a mounting surface;
• a carrier amplifier die connected to the mounting surface, wherein the carrier amplifier die includes a first transistor integrated within the carrier amplifier die, and wherein the first transistor includes a first drain terminal;
• a peaking amplifier die connected to the mounting surface, wherein the peaking amplifier die includes a second transistor integrated within the peaking amplifier die, and wherein the second transistor includes a second drain terminal;
• and
• an impedance inverter line assembly electrically connected between the first and second output terminals, wherein the impedance inverter line assembly includes a first transmission line connected to the mounting surface, and a surface mount component connected to the mounting surface in series between the first and second output terminals, wherein the surface mount component is selected from a fixed-value capacitor, a fixed-value inductor, a tunable capacitor, a tunable inductor, and a tunable passive component network.