Amplifier and transmitter

22:

• The amplifier of claim 21, wherein the first output network and the second output networks are configured to control a harmonic-impedance.

23:

• The amplifier of claim 21, wherein electrical lengths of the first output network and the second output networks are greater or less than 90 degrees.

24:

• The amplifier of claim 23, wherein the electrical length of the first output network is set based on transfer characteristics at a fundamental frequency, transfer characteristics at a second harmonic frequency, and transfer characteristics at a third harmonic frequency of the first signal, and
• the electrical lengths of the second output networks are set based on transfer characteristics at fundamental frequencies, transfer characteristics at second harmonic frequencies, and transfer characteristics at third harmonic frequencies of the second signals.

26:

• The amplifier of claim 25, wherein the first output network and the second output networks are configured to control a harmonic-impedance.

27:

• The amplifier of claim 26, wherein electrical lengths of the first output network and the second output networks are greater or less than 90 degrees.

28:

• The amplifier of claim 27, wherein the electrical length of the first output network is set based on transfer characteristics at a fundamental frequency, transfer characteristics at a second harmonic frequency, and transfer characteristics at a third harmonic frequency of the first signal, and
• the electrical lengths of the second output networks are set based on transfer characteristics at fundamental frequencies, transfer characteristics at second harmonic frequencies, and transfer characteristics at third harmonic frequencies of the second signals.

29:

• The amplifier of claim 25, comprising at least two of the first bias networks, wherein one of the first bias networks is connected to the first output network and at least one of first bias networks is connected to at least one of the second output networks, and
• voltage levels of the D.C. voltages supplied by the first bias networks are equal.

30:

• The amplifier of claim 25, wherein the second bias network is configured to control a harmonic-impedance of the first output network and the second output networks.

31:

• The amplifier of claim 25, wherein a voltage level at the second bias network is a ground level.

32:

• The amplifier of claim 25, wherein at least two of electric lengths of the first output network, the second output network, the first bias network, and the second bias network are different from each other, and
• at least two of widths of the first output network, the second output network, the first bias network, and the second bias network are different from each other.

34:

• The amplifier of claim 33, wherein the first output network and the second output networks are configured to control a harmonic-impedance.

35:

• The amplifier of claim 34, wherein electrical lengths of the first output network and the second output networks are greater or less than 90 degrees.

36:

• The amplifier of claim 35, wherein the electrical length of the first output network is set based on transfer characteristics at a fundamental frequency, transfer characteristics at a second harmonic frequency, and transfer characteristics at a third harmonic frequency of the first signal, and
• the electrical lengths of the second output networks are set based on transfer characteristics at fundamental frequencies, transfer characteristics at second harmonic frequencies, and transfer characteristics at third harmonic frequencies of the second signals.

37:

• The amplifier of claim 35, comprising at least two of the first bias networks, wherein one of the first bias networks is connected to the first output network and at least one of first bias networks is connected to at least one of the second output networks, and
• voltage levels of the D.C. voltages supplied by the first bias networks are equal.

38:

• The amplifier of claim 35, wherein the second bias network is configured to control a harmonic-impedance of the first output network and the second output networks.

39:

• The amplifier of claim 35, wherein a voltage level at the second bias network is a ground level.

40:

• The amplifier of claim 35, wherein at least two of electric lengths of the first output network, the second output network, the first bias network, and the second bias network are different from each other, and
• at least two of widths of the first output network, the second output network, the first bias network, and the second bias network are different from each other.