Wireless communication device

Details Wireless communication device Wireless communication device

2005-06-21

2005-06-21

Vuong, Quochien B. (Department: 2685)

Telecommunications

Transmitter and receiver at same station

With a common signal processing stage

C455S118000, C455S131000, C455S313000, C331S158000

Reexamination Certificate

active

06909883

ABSTRACT:
A receiving section has one crystal resonator122, an inductor124able to be connected in series to the crystal resonator122, and a channel change-over switch123for switching whether the inductor124is connected to the crystal resonator122and the ground, or the crystal resonator122is directly connected to the ground, and an adjusting change-over switch125. A transmitting section has one crystal resonator321, plural frequency setting adjusting circuits312,313each including an inductor314,316for determining a frequency oscillated from an oscillator, and a switching connection switch318for switching and connecting one of the plural frequency setting adjusting circuits312,313to a modulating circuit320connected to the crystal resonator321.

REFERENCES:
patent: 3913017 (1975-10-01), Imaseki
patent: 4218773 (1980-08-01), Imamura
patent: 4501018 (1985-02-01), Shanley et al.
patent: 6219531 (2001-04-01), Roberts et al.

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