Abstract: 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.

Abstract: A frequency generating circuit scales a warp range of a frequency signal. The frequency generating circuit includes a first frequency signal (10) having a first offset signal with a first frequency relationship to the first frequency signal, and a second frequency signal (14). A frequency scaling element (16) receives the first frequency signal (10) and second frequency signal and provides a third frequency signal, such that the third frequency signal includes the first offset signal having a second frequency relationship to the third signal. A switch (54), has a control input (74), a first input for receiving the first frequency signal, a second input operably coupled to the frequency scaling element (16, 42) for receiving the third frequency signal and an output (76) operably coupled to the first input or the second input dependent upon a control signal applied to the control input (74).