tda7333 STMicroelectronics, tda7333 Datasheet - Page 7

• Manufacturer Part Number: tda7333
• Description: Rds/rbds Processor
• Manufacturer: STMicroelectronics

Figure 5. Magnitude Response of Sinc4/16 Filter in RDS Band
7.4 RDS Bandpass Filter and Interpolator
The 8th order digital RDS bandpass filter is of type Tschebyscheff and centered at 57 kHz. With linear phase
characteristics in the passband and approximately flat group delay it guarantees best filter function of the RDS
and ARI signal. Four biquads are cascaded working at a common sampling frequency of XTI/2/16.
Figure 6. Transfer Function of RDS Bandpass Filter
100
0.5
1.5
2.5
3.5
4.5
10
20
30
40
50
60
70
80
90
1
2
3
4
5
10
0
5.4
0
4
4.5
5.5
5
Sinc4/16 Transfer Function (RDS Band)
5.6
Transfer Function of RDS Filter
Frequency [Hz]
Frequency [Hz]
5.5
5.7
6
5.8
6.5
5.9
7
x 10
x 10
4
6
4
TDA7333
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