Amplifier

An amplifier comprising:

• a transistor;
• a ground circuit electrically connected to a ground terminal of the transistor;
• a first capacitor electrically connected between an output terminal of the transistor and the ground circuit;
• a first inductor electrically connected to the output terminal of the transistor;
• a second capacitor electrically connected between the first inductor and the ground circuit;
• a bias circuit connected between the first inductor and the ground circuit;
• a second inductor electrically connected to the output terminal of the transistor;
• a third capacitor connected between the second inductor and a load circuit;
• a fourth capacitor connected between a terminal on a second inductor side of the third capacitor and the ground circuit;
• a fifth capacitor connected between a terminal on a load circuit side of the third capacitor and the ground circuit;
• and
• a third inductor connected between the terminal on a load circuit side of the third capacitor and the ground circuit.

An amplifier comprising:

• a transistor;
• a ground circuit electrically connected to a ground terminal of the transistor;
• a first capacitor electrically connected between an output terminal of the transistor and the ground circuit;
• a first inductor electrically connected to the output terminal of the transistor;
• a second capacitor electrically connected between the first inductor and the ground circuit;
• a bias circuit connected between the first inductor and the ground circuit;
• a first circuit electrically connected to the output terminal of the transistor, the first circuit including a third capacitor and a second inductor connected in series to the third capacitor;
• a third inductor connected between the first circuit and a load circuit;
• a fourth inductor connected between a terminal on a first circuit side of the third inductor and the ground circuit;
• and
• a fourth capacitor connected between a terminal on a load circuit side of the third inductor and the ground circuit.

An amplifier comprising:

• a transistor;
• a ground circuit electrically connected to a ground terminal of the transistor;
• a first capacitor electrically connected between an output terminal of the transistor and the ground circuit;
• a first inductor electrically connected to the output terminal of the transistor;
• a second capacitor electrically connected between the first inductor and the ground circuit;
• a bias circuit connected between the first inductor and the ground circuit;
• a third capacitor electrically connected to the output terminal of the transistor;
• a second inductor connected between the third capacitor and a load circuit;
• a third inductor connected between a terminal on a third capacitor side of the second inductor and the ground circuit;
• a fourth inductor connected between a terminal on a load circuit side of the second inductor and the ground circuit;
• and
• a fourth capacitor connected between the terminal on a load circuit side of the second inductor and the ground circuit.