| 摘要 |
An RF switch circuit ( 10 ) and a turner ( 12 ) comprising an RF switch circuit are described. The switch circuit comprises at least two input terminals and one output terminal. The input terminals are connected to different RF signal sources, e. g. a terrestrial TV antenna ( 16 ) and a TV cable network ( 18 ). The circuit comprises first SPST switches ( 28, 30 ), each connected to one of the input terminals and a second, SPDT switch ( 32 ) connected to the first SPST switches. The switch circuit achieves high isolation performance between the input terminals ( 20, 22 ).
|
