Semiconductor integrated circuit for communication and...

Details Semiconductor integrated circuit for communication and... Semiconductor integrated circuit for communication and...

2006-02-24

2008-11-18

Vuong, Quochien B (Department: 2618)

Telecommunications

Transmitter and receiver at same station

With a common signal processing stage

C455S260000, C455S333000, C455S552100, C375S376000

Reexamination Certificate

active

07454176

ABSTRACT:
The present invention provides a semiconductor integrated circuit for communication (RF IC) operable in a mode for receiving a received signal subjected to phase modulation and amplitude modulation and a mode for receiving a received signal subjected only to phase modulation. In the semiconductor integrated circuit for communication, a frequency band of a loop filter in a PLL circuit is switched and set so as to become large in a reception mode and become small in a transmission mode.

REFERENCES:
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patent: 6295442 (2001-09-01), Camp et al.
patent: 6516023 (2003-02-01), Kveim et al.
patent: 6766178 (2004-07-01), Damgaard et al.
patent: 7319352 (2008-01-01), Scheytt
patent: 11-168405 (1999-06-01), None
patent: 2003-087116 (2003-03-01), None

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