Nokia Mobile Phones Limited

Arno Kefenbaum

Markus Schetelig

Paul Burgess

The invention relates to a receiver arrangement for receiving frequency-modulated radio signals, having a demodulator circuit arrangement (), which converts and intermediate-frequency signal into a voltage signal, which is applied to an input stage () of a signal-processing circuit arrangement (), and having a clock-signal oscillator (), which supplies a clock signal for generating a frequency signal for reducing the frequency of a received signal to the intermediate frequency, and relates to a method of adapting a receiving branch of the receiver arrangement to an input stage () of a signal-processing circuit arrangement () and a self-testing method. To allow the adaptation of the demodulator circuit arrangement to the downstream input stage of a signal-processing circuit arrangement to be carried out without external test signals, a test-signal generator stage () is provided, which forms a test signal with a known frequency from the clock signal supplied by the clock-signal oscillator ().

Receiver arrangement for receiving frequency-modulated radio signals and methods of adapting and testing a receiving branch of the receiver arrangement

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Hattingen, Germany

Arno Kefenbaum