Receiver arrangement for receiving frequency-modulated radio...

Details Receiver arrangement for receiving frequency-modulated radio... Receiver arrangement for receiving frequency-modulated radio...

2005-05-17

2005-05-17

Nguyen, Lee (Department: 2682)

Telecommunications

Receiver or analog modulated signal frequency converter

Measuring or testing of receiver

C455S425000, C455S265000

Reexamination Certificate

active

06895229

ABSTRACT:
The invention relates to a receiver arrangement for receiving frequency-modulated radio signals, having a demodulator circuit arrangement (18), which converts and intermediate-frequency signal into a voltage signal, which is applied to an input stage (22) of a signal-processing circuit arrangement (23), and having a clock-signal oscillator (26), 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 (22) of a signal-processing circuit arrangement (23) 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 (28) is provided, which forms a test signal with a known frequency from the clock signal supplied by the clock-signal oscillator (26).

REFERENCES:
patent: 3605022 (1971-09-01), De Fillipo et al.
patent: 5678169 (1997-10-01), Turney
patent: 5835850 (1998-11-01), Kumar
patent: 5881376 (1999-03-01), Lundberg et al.
patent: 6259314 (2001-07-01), Liu et al.
English Abstract of Japanese Patent document No. JP 10276232.

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