High-frequency-signal switching circuit suppressing...

Details High-frequency-signal switching circuit suppressing... High-frequency-signal switching circuit suppressing...

2005-06-07

2005-06-07

Deane, Jr., William J. (Department: 2642)

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

C455S180200, C455S180300, C348S725000, C348S731000

Reexamination Certificate

active

06904271

ABSTRACT:
A high-frequency-signal switching circuit includes a first high-frequency-signal path which includes first and second diodes connected in series with a high-frequency amplifier stage therebetween, and a second high-frequency-signal path formed of a third diode connected in parallel to the first high-frequency-signal path. A switching-voltage supply section switches the high-frequency amplifier stage and first and second diodes ON, and the third diode OFF, so that a high-frequency signal is transferred through the first high-frequency-signal path, or switches the high-frequency amplifier stage and first and second diodes OFF and the third diode ON, so that a high-frequency signal is transferred through the second high-frequency-signal path.

REFERENCES:
patent: 4247953 (1981-01-01), Shinagawa et al.
patent: 6226503 (2001-05-01), Yamamoto et al.
patent: 0 874 452 (1998-10-01), None
patent: 0 998 032 (2000-05-01), None
patent: 2001-217602 (2001-08-01), None
patent: 2001-274602 (2001-10-01), None

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