Communications receiver with intermodulation reduction, and method
AssigneeMotorola, Inc.
InventorsMatthias König, Stefan Lichterfeld
Life of this patent
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AssigneeMotorola, Inc.
InventorsMatthias König, Stefan Lichterfeld
Estimating the term…
In a communications receiver (100) with a front stage (110) for receiving a transmitted RF input signal and a mixer stage (130) for mixing the RF input signal with an oscillator signal (OS) to provide an intermediate frequency (IF) signal, wherein the front stage (110) and the mixer stage (130) are coupled by an interconnecting section (130), intermodulation (IM) effects are reduced by (a) creating a forward (F) current through the section (120) by forward current means (R1, R3, R5, R4, C3, C1, C3, PD1, switch 140), (b) creating a reverse (R) current through the section (120) by reverse current means, (c) selectively coupling forward (F) and reverse (R) current means to the section (120) by selector means (140), to reduce the amplitude of the signal (RF OUT), which is applied to the mixer stage (130), and (d) operating the mixer stage in its linear operating range.
A communications receiver with a front end stage for receiving a transmitted RF input signal and a mixer stage for mixing the RF input signal with an oscillator signal so as to provide an intermediate frequency signal, wherein the front end stage is connected to the mixer stage by an interconnecting section, the communications receiver further comprising:
A method for reducing intermodulation effects in a communications receiver having a front end stage for receiving a transmitted RF input signal and a mixer stage for mixing said RE input signal with an oscillator signal so as to provide an intermediate frequency signal, wherein said front end stage is connected to said mixer stage by an interconnecting section,
Dependencies are inferred from the claim text.