PEB2466 SIEMENS [Siemens Semiconductor Group], PEB2466 Datasheet - Page 52

• Manufacturer Part Number: PEB2466
• Description: Four Channel Codec Filter with PCM- and m-Controller Interface SICOFI4-mC
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Semiconductor Group
Operating Mode
The operating mode for any of the four channels is entered upon recognition of a PU-bit
set to ‘1’ in a CR1-register for the specific channel.
3.6.2
Based on an advanced digital filter concept, the PEB 2466 provides excellent
transmission performance and high flexibility. The new filter concept leads to a maximum
independence between the different filter blocks.
Impedance Matching Filter
Transhybrid Balancing (TH) Filter
• Realization by 3 different loops
• Improved stability behavior of feedback loops
• Real part of termination impedance positive under all conditions
• Improved overflow performance for transients
• Return loss better 30 dB
• New concept: 2 loops at 16 kHz
• Flexible realization allows optimization of wide impedance range
• Consists of a fixed and a programmable part
• Trans-Hybrid-Loss better 30 dB (typically better 40 dB, device only)
• Adaptation to different lines by:
– 4 MHz:
– 128 kHz:
– 64 kHz:
– 2nd order Wave Digital Filter (IIR)
– 7-TAP FIR-Filter
– Easy selection between four different downloaded coefficient sets
Improves low frequency response
For fine-tuning
Programmable Filters
Multiplication by a constant
Wave Digital Filter (IIR)
Improves low frequency response
FIR-Filter
For fine-tuning
52
Programming the SICOFI
(106 bit)
(84 bit)
(12 bit)
(60 bit)
(48 bit)
PEB 2466
®
-4- C
02.97