PURPOSE: To allow an input side circuit to operate as a distributed switch by connecting the gate of a source ground FET for amplification and the drain of the separately provided source grounded FET through a capacitor with the connecting point of the distribution factor line of the input side ;CONSTITUTION: The sources and drains of source grounded FET 11a and 11b are set as the same potentials by a terminating resistance 8, and a switching operation can be attained by a bias voltage applied to a gate bias terminal 12. When the FET 11a and 11b are turned off, the distributed switch is turned on, a signal is inputted to an input side circuit 100a, and a distributed amplifier 100 operates similarly to the conventional distributed amplifier. On the other hand, when the FET 11a and 11b is turned on, the distributed switch is turned off, and the signal is not inputted to the input side circuit 100a. The FET 11a and 11b are set as resistance-free when they are turned on, and set as capacities(CT) when they are turned off. Thus, the FET 11a and 11b, and a capacitor 9 are designed so that an impedance Zo of the input side becomes 50Ω when the FET 11a and 11b are turned off, and so that the signal can be prevented from being inputted to the input side circuit 100a when the FET 11a and 11b are turned on.;COPYRIGHT: (C)1995,JPO
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机译：目的：通过将一个用于放大的源极接地FET的栅极和一个单独提供的源极接地FET的漏极通过一个电容器连接到输入的分布因子线的连接点，以允许输入侧电路作为分布式开关工作一侧;组成：源极接地的FET 11a和11b的源极和漏极通过端接电阻8设置为相同的电势，并且可以通过向栅极偏置端子12施加偏置电压来实现开关操作。开关11a和11b断开，分布式开关接通，信号输入到输入侧电路100a，并且分布式放大器100的操作类似于常规的分布式放大器。另一方面，当FET 11a和11b接通时，分布式开关断开，并且信号不输入到输入侧电路100a。 FET 11a和11b在导通时被设置为无电阻，而在其关断时被设置为电容（CT）。因此，FET 11a和11b以及电容器9被设计成使得当FET 11a和11b断开时输入侧的阻抗Zo变为50Ω，从而可以防止信号被输入到输入侧。 FET 11a和11b导通时的电路100a。版权所有：（C）1995，JPO
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