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    • 9. 发明授权
    • Distributed amplifier
    • 分布式放大器
    • US07276972B2
    • 2007-10-02
    • US11060299
    • 2005-02-18
    • Makoto KosugiAkira NishinoYasunori Ogawa
    • Makoto KosugiAkira NishinoYasunori Ogawa
    • H03F3/60
    • H03F3/605H01L27/0207
    • A distributed amplifier with a simple structure that permits miniaturization of circuit in which the input-side transmission line of the distributed amplifier is constituted by a coplanar line having a signal line and a ground face formed on the upper face of a dielectric substrate and the output-side transmission line of the distributed amplifier is constituted by a microstrip line having a signal line formed on the upper face of the dielectric substrate and a ground face formed on the lower face of the dielectric substrate. In addition, a plurality of amplification transistors is formed on the upper face of the dielectric substrate and each of the electrodes is connected to the signal line or the ground face that is formed on the upper face of the dielectric substrate. Because a large transistor-drive current does not flow to the input-side transmission line, the signal line can be made narrow and there is no increase in the required surface area even in the case of a coplanar line. Further, because the ground face of the coplanar line can be formed on the upper face of the dielectric substrate, the source electrodes or similar of the transistors can be grounded easily with a simple structure.
    • 具有简单结构的分布式放大器,其允许分布式放大器的输入侧传输线由具有形成在电介质基板的上表面上的信号线和接地面的共面线构成的电路的小型化,并且输出 分布式放大器的侧面传输线由形成在电介质基板的上表面上的信号线和形成在电介质基板的下表面上的接地面的微带线构成。 此外,在电介质基板的上表面上形成多个放大晶体管,并且每个电极连接到形成在电介质基板的上表面上的信号线或接地面。 由于大的晶体管驱动电流不流到输入侧传输线,所以即使在共面线的情况下,也可以使信号线变窄并且不需要增加所需的表面积。 此外,由于可以在电介质基板的上表面上形成共面线的接地面,所以可以以简单的结构容易地接地晶体管的源极或类似物。