A multi band low noise amplifier is provided to reduce a value of a passive device for input terminal matching in a low frequency band by sharing the passive device of the input terminal matching circuit. A first matching circuit(110) performs the impedance matching of the input terminal in a low frequency region. A first transistor includes a gate connected to a first matching circuit and a drain connected to an output terminal, and performs the amplification operation of the low frequency input. A first degeneration inductor is connected between the ground and the source of the first transistor. A second matching circuit(120) performs the impedance matching of the input terminal in a high frequency region. A second transistor includes the gate connected to the second matching circuit and the drain connected to the output terminal, and performs the amplification operation of the high frequency input. A second degeneration inductor is connected between the ground and the source of the second transistor.
申请公布号
KR20090056789(A)
申请公布日期
2009.06.03
申请号
KR20080064462
申请日期
2008.07.03
申请人
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE;ICU RESEARCH AND INDUSTRIAL COOPERATION GROUP
发明人
KIM, CHANG SUN;KIM, MU SUNG;YOON, BYOUNG JIN;HONG, EUN PYO;YOO, HYUNG JOUN