HARMONIC PROCESSING CIRCUIT AND AMPLIFYING CIRCUIT USING THE SAME

摘要

The present invention provides a harmonic processing circuit capable of miniaturizing a circuit, and an amplifier circuit using this harmonic processing circuit. A first impedance adjustment section and a second impedance adjustment section are provided. The first impedance adjustment section is provided with a coupled distributed constant line CT. The coupled distributed constant line CT receive as input the output of an amplification transistor S, and have a length of 1/4 the wavelength (») of the fundamental wave at the output of the amplification transistor S. Further, the first impedance adjusting section is configured to adjust input impedance with respect to the even harmonics to one of effectively infinity or zero. The first impedance adjusting section and the second impedance adjustment section are configured to adjust input impedance with respect to the odd harmonics to the other of effectively infinity or zero.