SP000012902 View Datasheet(PDF) - Infineon Technologies

Part Name

Description

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SP000012902

ASK Single Conversion Receiver

Infineon Technologies 

TDA 5201

ASK Single Conversion Receiver

Applications

4.5

Data Slicer Threshold Generation

The threshold of the data slicer especially for a coding scheme without DC-content, 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 RC-Integrator as shown in Figure 9. The

time constant TA of the RC-Integrator has to be significantly larger than the longest period of no signal change TL

within the data sequence. In order to keep distortion low, the minimum value for R is 20 kΩ.

R

C

Pins: 19

data

filter

20

Uthreshold

data out

25

data slicer

Figure 9 Data Slicer Threshold Generation with External R-C Integrator

Another possibility for threshold generation is to use the peak detector in connection 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 10 Data Slicer Threshold Generation Utilizing the Peak Detector

Data Sheet

26

Revision 1.6, 2010-12-21

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