tda5255e1 Infineon Technologies Corporation, tda5255e1 Datasheet - Page 64

• Manufacturer Part Number: tda5255e1
• Description: Ask/fsk 434mhz Wireless Transceiver
• Manufacturer: Infineon Technologies Corporation

Confidential
Figure 3-26
For applications requiring fast attack and slow release from the threshold value it is reasonable to
use the peak detectors. The threshold value is generated by an internal voltage divider. The release
time is defined by the internal resistance values and the external capacitors.
Figure 3-27
Preliminary Specification
Signal
Slicer Level using Peak Detector
Peak Detector timing
Data
Filter
Signal
Signal
t
t
100k
negPkD
Detector
Detector
R
+ Peak
negPkD
Slicer Threshold
posPkD
- Peak
+
-
DataSlicer
= 100
= 100
64
k
R1
R2
k
W
Contr.
Logic
W
100k
100k
×
C
×
t
Vcc
C
p
posPkD
DATA
PDP
13
SLC
14
PDN
12
28
n
Vcc
Pos. Peak Detector (pin13)
Neg. Peak Detector (pin12)
Threshold SLC(pin14)
C
C
P
N
t
TDA5255 E1
Version 1.1
Application
2002-11-28
PkD_timing.wmf
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SLC_PkD.wmf