tda5225 Infineon Technologies Corporation, tda5225 Datasheet - Page 73

• Manufacturer Part Number: tda5225
• Description: Enhanced Sensitivity Multi-channel Quad-conf Igurat Ion Receiver With Digital Slicer
• Manufacturer: Infineon Technologies Corporation

Depending on the bit content, the same type of edge (e.g. rising edge) is sometimes
shifted and sometimes not.
With this definition the Manchester duty cycle is calculated to
Figure 49
This definition determinates the duty cycle to be the ratio of the first symbol chip and the
ideal symbol period independently of the information bit content. The DC content
depends on the information bit and it is balanced only if the message itself is balanced.
For ΔT > 0 the first chip-period is longer than the ideal chip-period and for ΔT < 0 the first
chip-period is shorter than the ideal chip-period.
Depending on the bit content, the same type of edge (e.g. rising edge) is sometimes
shifted and sometimes not.
Data Sheet
1. chip
Definition B: Chip-based definition
Δ T
bit = 1
1
ΔT
2. chip
T
1 .ch ip
T
1.ch ip
MDC = Duration of the first chip / Symbol period
MDC
T
T
T
1
1
b it
b it
b it
A
=
Chip-based Definition
-------- -
T
T
MDC < 50%
MDC > 50%
bit
H
73
0
0
=
T
-------------------------- -
chip
T
T
1.ch ip
bit
+
T
1 .chip
ΔT
T
T
0
0
bit
bit
Functional Description
1
1
V1.0, 2010-02-19
TDA5225