Patent ID: 8355752

Claim:
A method comprising: (a) receiving an FM signal and using a local oscillator signal (LO) to downconvert the FM signal thereby generating a downconverted FM signal, wherein the downconverted FM signal has a center frequency, and wherein the LO is offset in frequency with respect to center frequency by a frequency offset; (b) processing the downconverted signal such that a processed FM signal is generated, wherein the processed FM signal has a center frequency; (c) supplying the processed FM signal to a digital Intermediate Frequency (IF) filter, wherein the digital IF filter has a center frequency that is substantially equal to the center frequency of the processed FM signal; (d) receiving a mode signal indicative of whether a cellular telephone circuit coupled to an FM receiver is operating in a first mode or in a second mode, wherein the receiving and downconverting of (a) and the processing of (b) and the supplying of (c) and the receiving of (d) all are performed by the FM receiver; (e) setting the frequency of the LO used in (a) such that the frequency offset has a first value if the mode signal received in (d) indicates that the cellular telephone circuit is operating in the first mode; and (f) setting the frequency of the LO used in (a) such that the frequency offset has a second value if the FM signal has a center frequency that is in a first range and if the mode signal received in (d) indicates that the cellular telephone circuit is operating in the second mode, wherein the center frequency of the digital IF filter is substantially the same in (e) and (f).