Infineon Technologies Ag

Jörg Bonhaus

Thomas Duda

Peter Gregorius

Lajos Gazsi

A device for the production of standard compliant signals, for example pulse-type signals in a telecommunication network, serves the production and adaptation and/or pre-distortion of signals with a certain signal form, which is defined dependent on a standard signal form specified in a standard. The device comprises signal generation means () for the production of the signals with a certain signal form and signal adjustment means () for the adaptation or pre-distortion of the signals. The signal generation means () according to the invention are digitally realized, by using a programmable shift register (), which contains multipliers specified by the standard signal form for multiplication with a digital input signal (). The signal adjustment means () comprise substantially scalable digital filter arrangements in the form of a serial connection of digital filters () with a downstream multiplexer (). Moreover, the invention provides attenuating means () for attenuation of the signal dependent on the characteristics of the telecommunication channel.

Device for the production of standard-compliant signals

PLL circuit for eliminating self-jitter in a signal which is received by a control circuit, having a phase comparison circuit for producing a phase difference signal, which indicates the phase difference between the received signal and a fed-back output signal from the PLL circuit; having a loop filter for filtering the phase difference signal which is produced; having an oscillator, which is controlled by the filtered phase difference signal, for producing the output signal from the PLL circuit; with the loop filter having a nonlinear transfer function.

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Hilden, Germany

Jörg Bonhaus