| 摘要 |
PURPOSE: A very high frequency and low noise amplifier circuit and a designing method thereof are provided to obtain a technical effect providing theoretical ground of tuning and to reduce costs by reducing of development time and experimental frequency by theoretically analysing difference between design and measurement. CONSTITUTION: A very high frequency and low noise amplifier circuit comprises a first matching circuit(100), a first transistor(200), a first inductor(400), a second matching circuit(500), a second transistor(600), a second inductor(1000), and a third matching circuit(1100). The first matching circuit receives very high frequency signal to be matched with impedance of the first transistor. The second matching circuit receives output signal outputted through a drain of the first transistor to be matched with impedance for minimizing signal reflected between the second transistor. The third matching circuit receives output signal outputted through a drain of the second transistor to be matched with the output of a characteristics impedance.
|
