Inductor devices – Coils of special configuration
Reexamination Certificate
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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Cameron Michael
Mai Anh T
Telefonaktiebolaget L M Ericsson (PUBL)
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