Electronically controllable RF switch

Details Electronically controllable RF switch Electronically controllable RF switch

2004-03-11

2009-10-27

Lee, Benny (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S262000, C327S503000

Reexamination Certificate

active

07609127

ABSTRACT:
An RF switch circuit (10) and a tuner (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).

REFERENCES:
patent: 5212408 (1993-05-01), Even-or
patent: 5272457 (1993-12-01), Heckaman et al.
patent: 6970056 (2005-11-01), Atokawa et al.
patent: WO 99/29045 (1999-06-01), None

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