Variable integrated inductor

Details Variable integrated inductor Variable integrated inductor

2005-08-29

2008-10-07

Mai, Anh T (Department: 2832)

Inductor devices

Coils of special configuration

C336S220000, C336S232000, C029S602100

Reexamination Certificate

active

07432794

ABSTRACT:
A variable integrated inductor is described herein which has an inductance value that can be switched between two or more values. In the preferred embodiment, the variable integrated inductor includes a multi-loop primary inductor which is electromagnetically coupled to a pair of secondary inductors. The secondary inductors are connected to one another to form a closed circuit within which the secondary inductors have a changeable topology that can be switched between a series connection and a parallel connection in order to change an inductance value which is output by the multi-loop primary inductor. In one application, the variable integrated inductor is used in a voltage controlled oscillator (VCO) which is of the type that can be used in a multi-band RF radio transceiver (e.g., wireless communication device). In other applications, the variable integrated inductor can be used in a tuned amplifier load, an impedance matching network, a digitally controlled oscillator or any other type of frequency selective LC-network.

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patent: 2005/0068146 (2005-03-01), Jessie
patent: WO98/05048 (1998-02-01), None
patent: WO2004/012213 (2004-02-01), None

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