FM multiplex broadcasting receiver for receiving RDS and DARC si

Details FM multiplex broadcasting receiver for receiving RDS and DARC si FM multiplex broadcasting receiver for receiving RDS and DARC si

1998-03-19

2000-06-27

Urban, Edward F.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455265, 455 45, 455260, H04B 700, H04B 118

Patent

active

060816996

ABSTRACT:
A receiver is provided capable of receiving both RDS (Radio Data System) and DARC (DAta Radio Channel) system FM multiplex broadcasting. An RDS signal demodulating circuit is provided with a PLL circuit which comprising a first frequency divider for dividing an output of a crystal oscillator, a phase comparator for inputting an output of the first frequency divider, a low-pass filter connected with the phase comparator, a VCO connected with the low-pass filter, and a second frequency divider for dividing an output of the VOC and outputting the divided output signal to the phase comparator. An output of the VCO is transmitted as a reference clock RDSCL for demodulation of an RDS signal.

REFERENCES:
patent: 4688263 (1987-08-01), Aldridge
patent: 5142692 (1992-08-01), Owen
patent: 5930697 (1999-07-01), Bohme et al.
patent: 5960328 (1999-08-01), Kimura et al.
patent: 5969634 (1999-10-01), Takashima et al.
European Search Report on application No. EP 98 30 2342, Nov. 1998.

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