3G radio
AssigneeAnalog Devices, Inc.
InventorsSimon Atkinson, Palle Birk, Stacy Ho, Zoran Zvonar, Aidan Cahalane
Life of this patent
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Abstract
A homodyne receiver is provided for receiving GSM and UMTS transmissions. The receiver may also be used for other transmission schemes. The receiver includes an electronically reconfigurable low pass filter and an off set generator for providing DC offset correction for offsets which may be generated as a result of coupling between a local radio frequency oscillator and the receiver front end.
Claims34
A direct conversion multimode receiver, comprising at least one electronically reconfigurable filter.
A direct conversion multi mode receiver, comprising at least one electronically reconfigurable filter arranged to filter a base band signal from the receiver and a DC offset generator, each under the control of a control circuit such that offset and filter response are automatically controlled as functions of reception mode and signal conditions.
A hybrid filter comprising in combination a Chebychev filter response and an inverse—Chebychev filter response.
Dependencies are inferred from the claim text.