Amplifier device with harmonic termination circuit

A packaged amplifier device comprising:

• a base substrate;
• a first input terminal;
• a first output terminal;
• a first transistor formed on a semiconductor substrate that is coupled to the base substrate, wherein the first transistor includes a control terminal and first and second current-carrying terminals, wherein the first transistor is characterized by a first output capacitance, and wherein the control terminal is coupled to the first input terminal and the first current-carrying terminal is coupled to a voltage reference;
• a first class-J circuit formed on a first substrate that is coupled to the base substrate, wherein the first class-J circuit includes a series inductor that couples the second current-carrying terminal to a first resonator at a first node, wherein the first resonator is characterized by a first resonant frequency that is substantially equal to a second harmonic frequency, wherein the first resonator is integrally formed with the first substrate, and wherein the first resonator is coupled between the first node and the voltage reference, and wherein the class-J circuit is configured to harmonically terminate the first transistor;
• and
• a shunt inductor coupled between the first node of the first class-J circuit and the voltage reference, wherein the shunt inductor is configured to increase an impedance of the first node at a fundamental frequency.

A packaged amplifier device comprising:

• a base substrate;
• a first input terminal;
• a first output terminal;
• a first transistor formed on a semiconductor substrate that is coupled to the base substrate, wherein the first transistor includes a control terminal and first and second current-carrying terminals, wherein the first transistor is characterized by a first output capacitance, and wherein the control terminal is coupled to the first input terminal and the first current-carrying terminal is coupled to a voltage reference;
• a first class-J circuit formed on a first substrate that is coupled to the base substrate, wherein the first class-J circuit includes a series inductor that couples the second current-carrying terminal to a first resonator at a first node, wherein the first resonator is characterized by a first resonant frequency that is substantially equal to a second harmonic frequency, wherein the first resonator is integrally formed with the first substrate, and wherein the first resonator is coupled between the first node and the voltage reference, and wherein the class-J circuit is configured to harmonically terminate the first transistor;
• a second input terminal;
• a second output terminal;
• a second transistor formed on a semiconductor substrate that is coupled to the base substrate, wherein the second transistor includes a second control terminal and third and fourth current-carrying terminals, wherein the second control terminal is coupled to the second input terminal and the first current-carrying terminal is coupled to the voltage reference;
• and
• a second class-J circuit formed on a second substrate that is coupled to the base substrate, wherein the second class-J circuit includes a series inductor that couples the fourth current-carrying terminal to a second resonator at a second node, wherein the second resonator is characterized by the first resonant frequency that is substantially equal to the second harmonic frequency, wherein the second resonator is integrally formed with the second substrate, and wherein the second resonator is coupled between the second node and the voltage reference, and wherein the class-J circuit is configured to harmonically terminate the second transistor.

An amplifier device comprising:

• a first amplifier path that includes
• an input terminal,
• an output terminal,
• a first transistor that includes a control terminal and first and second current-carrying terminals, wherein the first transistor is characterized by a first output capacitance, wherein the control terminal is coupled to the input terminal. and wherein the first current-carrying terminal is coupled to a voltage reference, and,
• a class-J circuit coupled between the second current-carrying terminal and the output terminal at a first node and configured to harmonically terminate the first transistor, wherein the class-J circuit includes a first resonator and a shunt inductor, wherein the first resonator is characterized by a first resonant frequency substantially equal to a second harmonic frequency, coupled between the first node and the voltage reference, and the shunt inductor is distinct from the first resonator coupled between the first node and the voltage reference, and wherein the shunt inductor is configured to increase an impedance at the first node at a fundamental frequency;
• and
• a second amplifier path that includes;
• a second input terminal,
• a second output terminal,
• a second transistor that includes a second control terminal and third and fourth current carrying terminals, wherein the second control terminal is coupled to the second input terminal, the third current carrying terminal is coupled to a voltage reference, and the fourth current carrying terminal is coupled to the second output terminal.