Apparatus and method for frequency generation

Details Apparatus and method for frequency generation Apparatus and method for frequency generation

2009-06-03

2011-11-15

Mis, David (Department: 2817)

Oscillators

Plural oscillators

C331S048000, C331S068000, C331S10800D, C331S167000, C331S179000

Reexamination Certificate

active

08058934

ABSTRACT:
A wideband frequency generator has two or more oscillators for different frequency bands, disposed on the same die within a flip chip package. Coupling between inductors of the two oscillators is reduced by placing one inductor on the die and the other inductor on the package, separating the inductors by a solder bump diameter. The loosely coupled inductors allow manipulation of the LC tank circuit of one of the oscillators to increase the bandwidth of the other oscillator, and vice versa. Preventing undesirable mode of oscillation in one of the oscillators may be achieved by loading the LC tank circuit of the other oscillator with a large capacitance, such as the entire capacitance of the coarse tuning bank of the other oscillator. Preventing the undesirable mode may also be achieved by decreasing the quality factor of the other oscillator's LC tank and thereby increasing the losses in the tank circuit.

REFERENCES:
patent: 6621365 (2003-09-01), Hallivuori et al.
patent: 7423495 (2008-09-01), Bevilacqua et al.
patent: 2010/0072572 (2010-03-01), Baumgartner et al.
patent: 1962342 (2008-08-01), None
patent: WO2009022991 (2009-02-01), None
International Search Report and Written Opinion—PCT/US2010/037326—ISA/EPO—Apr. 20, 2011.

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