tda5235 Infineon Technologies Corporation, tda5235 Datasheet - Page 125

• Manufacturer Part Number: tda5235
• Description: Enhanced Sensitivity Double-configuration Receiver With Digital Baseband Processing
• Manufacturer: Infineon Technologies Corporation

With this definition the Manchester duty cycle is calculated to
Figure 90
This definition determinates the duty cycle to be the ratio of the duration of the delayed
high-chip and the ideal symbol period independently of the information bit content. The
position of the high-chip is determined by the delayed rising edge and/or the delayed
falling edge. For ΔT = T
Independent on the bit content, the same type of edge (rising edge and/or falling edge)
is shifted.
Data Sheet
MDC
Definition C: Edge delay definition
C
ΔT
1. chip
=
bit = 1
1
1
T
----------------------------------------
ΔT
2. chip
fall
delayedHighchip
-T
T
T
rise
r
MDC
bit
T
T
H
H
the Manchester duty cycle is calculated to
MDC = Duration delayed edge / Symbol period
T
T
T
1
1
1
b it
b it
b it
T
f
B
=
Edge delay Definition
=
T
----------------
MDC < 50% T
MDC > 50% T
T
1.chip
T
------------------------- -
125
bit
chip
T
T
0
0
0
bit
bit
T
bit
T
f
+
r
=
H
= 0
= 0
Δ
T
------------------------- -
T
f
T
chip
=
T
T
T
0
0
0
bit
b it
b it
T
T
----------------------------------------------- -
+
r
chip
Δ
T
H
T
+
T
T
Functional Description
fall
bit
1
1
1
–
T
rise
V1.0, 2010-02-19
TDA5235