PEB2060

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. PEB 2060 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.

The analog input signal of PEB 2060 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)PEB 2060 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).

The digital input signal of PEB 2060 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 of PEB 2060 is fed to the 2nd order Sallen-Key Postfilter (POFI).

The high flexibility of the SICOFI PEB 2060 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 PEB 2060 and the trans-hybrid balancing filter B.

The SICOFI PEB 2060 bridges the gap between analog and digital voice signal transmission in modern telecommunication systems.

High performance oversampling Analog-to-Digital Converter PEB 2060(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 PEB 2060(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 PEB 2060 feature control. Specific filter programming is done by downloading coefficients to the Coefficient RAM (CRAM).

The 10-pin parallel signaling interface PEB 2060 provides for a powerful per line SLIC control.