PEB2465 SIEMENS [Siemens Semiconductor Group], PEB2465 Datasheet - Page 46

• Manufacturer Part Number: PEB2465
• Description: Four Channel Codec Filter
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Semiconductor Group
6
Based on an advanced digital filter concept, the PEB 2465 provides excellent
transmission performance and high flexibility. The new filter concept leads to a maximum
independence between the different filter blocks.
6.1
• 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
6.2
• New concept:
• 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:
6.3
• For line equalization and compensation of attenuation distortion
• Improvement of Group-Delay-Distortion by using minimum phase filters
• FRR filter for correction of receive path distortion
• FRX filter for correction of transmit path distortion
• Frequency response better 0.1 dB
– 4 MHz: Multiplication by a constant
– 128 kHz: Wave Digital Filter (IIR)
– 64 kHz: FIR-Filter
– 2
– 7-TAP FIR-Filter
– Easy selection between four different downloaded coefficient sets
(instead of linear phase filters)
– 5 TAP programmable FIR filter operating at 8 kHz
– 5 TAP programmable FIR filter operating at 8 kHz
(improves low frequency response)
(for fine-tuning)
(improves low frequency response)
(for fine-tuning)
nd
Programmable Filters
Impedance Matching Filter
Transhybrid Balancing (TH) Filter
Filters for Frequency Response Correction
order Wave Digital Filter (IIR)
2 loops at 16 kHz
46
(12 bit)
(60 bit)
(48 bit)
(106 bit)
(84 bit)
(60 bit)
(60 bit)
Programmable Filters
PEB 2465
02.97