Dual-band voltage-controlled oscillator using bias switching...

Details Dual-band voltage-controlled oscillator using bias switching... Dual-band voltage-controlled oscillator using bias switching...

2005-11-29

2008-08-19

Pascal, Robert J. (Department: 2817)

Oscillators

With frequency adjusting means

Step-frequency change

C331S002000, C331S046000, C331S049000, C331S056000, C331S186000

Reexamination Certificate

active

07414490

ABSTRACT:
Disclosed is a dual-band voltage-controlled oscillator using bias switching and output-buffer multiplexing. The dual-band voltage-controlled oscillator includes a power supply unit for supplying a source voltage; plural voltage-controlled oscillation units for outputting different oscillation frequencies according to controls of a certain tuning voltage; plural bias units for generating driving voltages for driving the voltage-controlled oscillation units and supplying the driving voltages to the voltage-controlled oscillation units; and plural buffers for selectively outputting oscillation frequencies of the plural voltage-controlled oscillation units. The present invention implements the dual-band voltage-controlled oscillator through bias switching and output-buffer multiplexing, which brings an advantage of elimination of interference between output frequencies to enhance phase noise characteristics.

REFERENCES:
patent: 5705955 (1998-01-01), Freeburg et al.
patent: 5982242 (1999-11-01), Jun et al.
patent: 6650194 (2003-11-01), Kertis et al.
patent: 6876263 (2005-04-01), Li et al.
patent: 7116180 (2006-10-01), Hamaguchi et al.
patent: 7123113 (2006-10-01), Brennan et al.
patent: 7138877 (2006-11-01), Vu et al.

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