Title: Adjusting circuit
Application Number: 200580003550 Application Date: 2005.01.28
Publication Number: 1914792 Publication Date: 2007.02.14
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03F1/32;H03H7/38;H03C1/08
Applicant(s) Name: Nokia Corp. Address:
Inventor(s) Name: Koukkari Eero;Oilinki Tero;Kurttio Pasi
Attorney & Agent: feng pu
Abstract:
    The invention relates to an adjusting circuit for adjusting an amplitude of a radio frequency signal. The adjusting circuit comprises a plurality of terminals for input and output, a matching component having an effect on matching a signal input and a signal output to and from the terminals. The adjusting circuit also includes at least one adjustable resistance unit between the matching component and ground for changing a resistance of the input and the output of at least one terminal of the amplitude adjusting circuit. The adjusting circuit for adjusting an amplitude of a signal also may include a plurality of terminals for input and output, at least one pair of adjustable impedance units. Each pair of the adjustable impedance units is placed between a pair of input and output terminals. Each of the adjustable impedance units is coupled in parallel between a signal line and ground, and the impedance units of each pair have complementary reactances with respect to each other.
Time: 12
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