Voltage controlled oscillator and semiconductor integrated...

Details Voltage controlled oscillator and semiconductor integrated... Voltage controlled oscillator and semiconductor integrated...

2007-08-21

2007-08-21

Kinkead, Arnold (Department: 2817)

Oscillators

With frequency adjusting means

Step-frequency change

C331S016000, C331S17700V, C331S167000, C331S1170FE, C331S1170FE

Reexamination Certificate

active

11220597

ABSTRACT:
A VCO include a resonance tank circuit(A) and an amplification circuit(B) which oscillates and is amplified at a resonance frequency of the resonance tank circuit(A). The resonance tank circuit(A) is provided with a capacity band switching circuit(D) for varying an oscillation frequency band, and a current band switching circuit(E) for feeding an appropriate current, corresponding to each oscillation frequency band, to the amplification circuit(B). This allows expansion of the oscillation frequency variable range as well as realization of a favorable phase noise characteristic in a broad band by optimization of a current in each frequency band.

REFERENCES:
patent: 6583675 (2003-06-01), Gomez
patent: 7119624 (2006-10-01), Gomez
patent: 2001/0052823 (2001-12-01), Hirano et al.
patent: 2001-339301 (2001-12-01), None

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