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參數(shù)資料
| 型號： | SAA7706H/N210,518 |
| 廠商： | NXP Semiconductors |
| 文件頁數(shù)： | 20/52頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC CAR RADIO DSP 80-QFP |
| 標準包裝： | 500 |
| 類型： | 汽車信號處理器 |
| 接口： | I²C，I²:S，LSB，SPDIF |
| 電壓 - 輸入/輸出： | 3.30V |
| 電壓 - 核心： | 3.30V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 80-BQFP |
| 供應(yīng)商設(shè)備封裝： | 80-QFP（14x20） |
| 包裝： | 帶卷 (TR) |
| 其它名稱： | 935270285518 SAA7706H/N210-T SAA7706H/N210-T-ND |
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2001 Mar 05
27
Philips Semiconductors
Product specication
Car radio Digital Signal Processor (DSP)
SAA7706H
8.15
RDS demodulator (pins RDS_CLOCK
and RDS_DATA)
The RDS demodulator recovers the additional inaudible
RDS information which is transmitted by FM radio
broadcasting. The (buffered) data is provided as output for
further processing by a suitable decoder. The operational
functions of the decoder are in accordance with the EBU
specification
”EN 50067”.
The RDS demodulator has three different functions:
Clock and data recovery from the MPX signal
Buffering of 16 bits, if selected
Interfacing with the microcontroller.
8.15.1
CLOCK AND DATA RECOVERY
The RDS-chain has a separate input. This enables RDS
updates during tape play and also the use of a second
receiver for monitoring the RDS information of signals from
an other transmitter (double tuner concept). It can as such
be done without interruption of the audio program. The
MPX signal from the main tuner of the car radio can be
connected to this RDS input via the built-in source
selector. The input selection is controlled by an I2C-bus bit.
The RDS chain contains a sigma-delta ADC (ADC3),
followed by two decimation filters. The first filter passes the
multiplex band including the signals around 57 kHz and
reduces the sigma-delta noise. The second filter reduces
the RDS bandwidth around 57 kHz. The overall filter curve
is shown in Fig.16 and a more detailed curve of the RDS
57 kHz band in Fig.17.
handbook, full pagewidth
152
0
100
0
38
114
MGT471
76
133
19
95
57
80
60
40
20
f (kHz)
α
(dB)
Fig.16 Overall frequency response curve decimation filters.
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| SAA7707H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Car radio Digital Signal Processor CDSP |
| SAA7708H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Car Radio Digital Signal Processor |
| SAA7709/N107 | 制造商:PHILIPS-SEMI 功能描述: |
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