PEB2060 [INFINEON]
PCM Codec, A/MU-Law, 1-Func, CMOS,;
| 型号： | PEB2060 |
| 厂家： | 
Infineon |
| 描述： | PCM Codec, A/MU-Law, 1-Func, CMOS, PC 电信 电信集成电路 |
| 文件： | 总2页 (文件大小：19K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Signal Processing Codec Filter (SICOFI )
PEB 2060
General Description
Type
Package
The Signal Processing Codec Filter (SICOFI) PEB 2060 is a
fully integrated PCM codec (coder-decoder) and transmit/
receive filter produced in advanced CMOS technology for
applications in digital exchange telecommunication systems.
Based on a digital filter concept the PEB 2060 provides
improved transmission performance and high flexibility. It
enables the control of the device’s analog behavior by digital
signal processing, including attractive features such as
programmable trans-hybrid balancing, impedance matching,
level control and frequency response correction. The device
is optimized for working in conjunction with the PCM Interface
Controller PEB 2052/55.
PEB 2060-N
PEB 2060-P
P-LCC-28-1 (SMD)
P-DIP-22-1
(not for new development)
Features
• Single-chip codec and filter
• Band limitation according to CClTT and LSSGR
recommendations
• Digital signal processing techniques
• Digital voice transmission
– PCM encoded (A-Law or µ-Law)
– linear (16-bit 2s complement)
The analog input signal is A/D converted, digitally filtered and
transmitted either PCM-encoded or linear. Antialiasing is
done with a 2nd order Sallen-Key Prefilter (PREFI). The A/D
Converter (ADC) is a modified slope adaptive interpolative
coder with a sampling rate of 128 kHz. Digital downsampling
to 8 kHz is done by subsequent decimation filters D1 and D2
together with the PCM bandpass filter (BP).
•
•
Programmable digital filters for
– impedance matching
– transhybrid balancing
– gain
– frequency-response correction
Configurable 3-pin serial interface
– 512-kHz SLD-Bus (e.g. to PEB 2052/55)
– burst mode with bit rates up to 8 MHz
The digital input signal is received PCM encoded or linear,
digitally filtered and D/A converted to generate the analog
output signal. Digital interpolation up to 128 kHz is done by
the PCM lowpass filter (LP) and the interpolation filters l1 and
l2. The D/A Converter (DAC) output is fed to the 2nd order
Sallen-Key Postfilter (POFI).
• Programmable signaling interface with
peripherals (e.g. SLIC)
• High performance A/D and D/A conversion
• Programmable analog gain
• Advanced test capabilities
– three digital loopback modes
– two analog loopback modes
– on-chip sinewave generation
The high flexibility of the SICOFI is based on a variety of user
programmable filter, which are analog gain adjustment AGR
and AGX, digital gain adjustment GR and GX, frequency
response adjustment R and X, impedance matching filter Z
and the trans-hybrid balancing filter B.
• No trimming or adjustment
• No external components
• Variable SICOFI master clock selection
• Signaling expansion possible
The SICOFI bridges the gap between analog and digital
voice signal transmission in modern telecommunication
systems.
High performance oversampling Analog-to-Digital Converter
(ADC) and Digital-to-Analog Converter (DAC) provide the
conversion accuracy required. An analog antialiasing
Prefilter (PREFI) and smoothing Postfilter (POFI) is included.
The dedicated on-chip Digital Signal Processor (DSP)
handles all the algorithms necessary, e.g. PCM bandpass
filtering, sample rate conversion and PCM comparing. The
3-pin serial SLD-Bus interface handles digital voice
transmission and SICOFI feature control. Specific filter
programming is done by downloading coefficients to the
Coefficient RAM (CRAM).
• Prepared for three-party conferencing
• Advanced low power CMOS technology
The 10-pin parallel signaling interface provides for a powerful
per line SLIC control.
1
Siemens Aktiengesellschaft
Signal Processing Codec Filter (SICOFI )
PEB 2060
Signaling
SA...SD SI
SO
4
3
3
S
L
D
DIR
A
VIN
PREFI
D
SCLK
SIP
Interface
B
U
S
DSP
Coeff.
RAM
D
VOUT
POFI
A
ITB00635
Block Diagram
A
+
VIN
AGX
PREFI
D1
D2
GX
BP
X
Comp
D
Transmit
Receive
SIP
DIR
SLD
Interface
Z
+
B
SIN
SCLK
D
A
VOUT
POFI
AGR
I2
I1
GR
LP
R
Exp
ITS00634
Signal Flow
2
Siemens Aktiengesellschaft
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