MTC-20144TQ-I AMI Semiconductor, Inc., MTC-20144TQ-I Datasheet - Page 8

• Manufacturer Part Number: MTC-20144TQ-I
• Description: Integrated ADSL CMOS Analog Front-End Circuit
• Manufacturer: AMI Semiconductor, Inc.

ATU_R Side Block
Diagram
The ATU-R-side block diagram is equal
to the ATU_C-side block diagram with
the following differences :
- The transformer ratio is 1:1
- Termination resistors are 50Ω for
100Ω lines.
An LP filter may be used on the TX path
to reduce DMT sidelobes and out of
band noise influence on the receiver.
On the RX path, a HP filter must be used
in order to reduce the echo signal level
and to avoid saturation of the input
stage of the receiver.
The POTS filter is used in both direction
to reduce crosstalk between ADSL
signals and POTS speech and
signalling.
Fig. 5: ATU-R AFE Schematics
8
VCXO
see fig 10 for full details
MTC-20144
Interface to
MTC-20146