Voltage controlled oscillator with automatic band selector

Details Voltage controlled oscillator with automatic band selector Voltage controlled oscillator with automatic band selector

2006-05-30

2006-05-30

Callahan, Timothy P. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S147000

Reexamination Certificate

active

07053683

ABSTRACT:
A method and circuit for selecting the band of a multi-band voltage controlled oscillator in a phase locked loop is described. In one implementation, the circuit comprises a voltage controlled oscillator, a selection circuit for selecting a band for the voltage controlled oscillator from a plurality of predetermined bands, a decision circuit for determining if the selection circuit should select a new band from the plurality of predetermined bands, and a charging circuit for adjusting the input voltage into the voltage controlled oscillator.

REFERENCES:
patent: 4590602 (1986-05-01), Wolaver
patent: 5923196 (1999-07-01), Okamoto
patent: 6112068 (2000-08-01), Smith et al.
patent: 6411660 (2002-06-01), Oh
patent: 6583675 (2003-06-01), Gomez
patent: 6711229 (2004-03-01), Harada
patent: 2003/0224749 (2003-12-01), Uozumi et al.

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