Tunable inductor arrangement, transceiver, method and computer program

Abstract

A tunable inductor arrangement arrangable on a chip or substrate is disclosed. The tunable inductor comprises a first winding part connected at one end to a first input of the tunable inductor arrangement, a second winding part connected at one end to the other end of the first winding part, a third winding part connected at one end to a second input of the tunable inductor arrangement, a fourth winding part connected at one end to the other end of the third winding part, and a switch arrangement arranged to tune the tunable inductor arrangement. Tuning is performed by selectively provide any of a circuit comprising the first and third winding parts in series between the first and second inputs, or a circuit comprising the first, second, fourth and third winding parts in series between the first and second inputs. The first and third winding parts are arranged on the chip or substrate such that magnetic fields of the first and third windings are essentially common, and the second and fourth winding parts are arranged to cancel electro-magnetic coupling with the first and third winding parts. A receiver, a transceiver, a communication device, a method and a computer program are also disclosed.

Description

technical field [0001] The present invention relates generally to tunable inductor arrangements, radio frequency transceivers or receivers incorporating resonators having such arrangements, communication devices, methods of tuning such arrangements and computer programs for tuning. Background technique [0002] Since more frequency bands are to be supported in a radio transceiver (these frequency bands may be spread over a wider frequency range such as from 700MHz to 3800MHz), this can be met by a collection of resonators. It is known that tuning an LC (inductor-capacitor) resonator over an octave is difficult, which dictates that multiple resonators may be required. This issue is given greater weight when carrier aggregation (ie communications are performed simultaneously on multiple different carriers), where these carriers may be distributed anywhere over a wide frequency range. [0003] LC resonators consume chip space when implemented on-chip and are quite costly when ...

AI Technical Summary

Problems solved by technology

[0003] LC resonators consume chip space when implemented on-chip and are quite costly when implemented off-chip

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