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21. 发明授权

US5263198A Resonant loop resistive FET mixer 失效
标题翻译：谐振回路电阻FET混频器
公开(公告)号：US5263198A
公开(公告)日：1993-11-16
申请号：US788072
申请日：1991-11-05
申请人： John J. Geddes , Paul E. Bauhahn
发明人： John J. Geddes , Paul E. Bauhahn
IPC分类号： H03D7/12 , H03D9/06 , H04B1/28
CPC分类号： H04B1/28 , H03D7/125 , H03D2200/0074 , H03D2200/009 , H03D9/0658
摘要： A mixer includes a local oscillator (LO) matching network having an LO input port, an RF matching network also having an input port and an IF filter which provides an IF output from the mixer. A FET having a gate, drain and source operates at the center of the mixer. A resonant loop is connected between the drain and gate of the FET. The gate of the FET is connected to an output of the LO matching network. The drain of the FET is connected to an output of the RF matching network. The source of the FET is connected to an input of the IF filter. The resonant loop may incorporate a DC blocking capacitor which does not function as part of the resonant loop, but which serves to block DC allowing the drain and gate of the FET to be biased independently.
摘要翻译：混频器包括具有LO输入端口的本地振荡器（LO）匹配网络，还具有输入端口的RF匹配网络和提供来自混频器的IF输出的IF滤波器。具有栅极，漏极和源极的FET在混频器的中心处工作。谐振回路连接在FET的漏极和栅极之间。 FET的栅极连接到LO匹配网络的输出。 FET的漏极连接到RF匹配网络的输出。 FET的源极连接到IF滤波器的输入端。谐振回路可以包括不用作谐振回路的一部分的隔直流电容器，但是用于阻止直流，使得FET的漏极和栅极被独立地偏置。

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