Datasheet > S1A0905

S1A0905

更新时间： 2024-09-16 22:43:43

品牌	Logo	应用领域
三星 - SAMSUNG		/
页数	文件大小	规格书
6页	58K
描述
RDS DEMODULATOR IC

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中文翻译

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数据手册

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S1A0905 数据手册

Preliminary

RDS DEMODULATOR IC

S1A0905

GENERAL DESCRIPTION

16- SOP- 225

THE OUTLINE OF RDS(RADIO DATA SYSTEM)

Since 1988 most European national broadcaststations transmit RDS-

code beside their audio signals. RDS means Radio Data System and

was originally intended to give people in their cars additional informa-

tion about the weather or traffic(jams). But RDS has grown out to one

big channel of information. Radiostations send their name, the time

(with DCF-77 accuracy), their type of music (format) and even more.

The digital data of RDS are multiplexed into an FM radio wave using a

sub-carrier of 57kHz. The transmission rate of RDS data is

1.1875kbit/sec.

The transmission rate of RDS data is 1.1875kbit/sec, and RDS data

are encoded by differential encoding method. Then the encoded RDS data are modulated by BPSK using a clock

of 1.1875kHz. The modulated RDS data is are modulated by carrier suppressed amplitude modulation using a sub-

carrier of 57kHz. And that signal are multiplexed into an FM radio wave.

•RDS data are obtained by demodulating the received RDS modulation signal in RDS demodulator. First, the RDS

modulation signal is extracted from an FM radio wave using a band pass filter. The BPSK signal is obtained from

extracted RDS modulation signal by a 57kHz carrier recovery circuit. Then the bit rate clock of RDS data is

extracted from the BPSK signal, and the BPSK signal is demodulated using the extracted clock signal. Then the

RDS data are decoded by a differential decoding method using the demodulated BPSK signal.

FEATURES

•

Low Current

Two Stage Anti-aliasing Filter

8'th 57kHz Switched Capacitor Bandpass Filter

DSB Demodulation (Carrier Recovery)

Clock Recovery Circuit

Biphase Decoder & Differential Decoder

Quality Indication Output for Demodulated Data

ORDERING INFORMATION

DEVICE

PACKAGE

16-SOP-225

OPERATING TEMP.

S1A0905-S0B0

-40 - +85

12 3 4 5 6

中文翻译

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