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TDA5200 Datasheet, PDF (27/43 Pages) Infineon Technologies AG – ASK Single Conversion Receiver | |||
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TDA 5200
Applications
4.5 Data Slicer Threshold Generation
The threshold of the data slicer can be generated in two ways, depending on
the signal coding scheme used. In case of a signal coding scheme without DC
content such as Manchester coding the threshold can be generated using an
external R-C integrator as shown in the following . The cut-off frequency of the
R-C integrator has to be lower than the lowest frequency appearing in the data
signal. In order to keep distortion low, the minimum value for R is 20kâ¦.
R
C
Pins: 19
data
filter
20
Uthreshold
data out
25
data slicer
Figure 4-5
Data_slice1.wmf
Data Slicer Threshold Generation with External R-C Integrator
Another possibility for threshold generation is to use the peak detector in con-
nection with two resistors and one capacitor as shown in the following figure.
The component values are depending on the coding scheme and the protocol
used.
R
C
R
Pins: 26 19
peak detector
20
Uthreshold
data out
25
data slicer
data
filter
Figure 4-6
Data_slice2.wmf
Data Slicer Threshold Generation Utilising the Peak Detector
Wireless Components
4-7
Specification, March 2000
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