GRAZ, Austria--Chip maker austriamicrosystems AG here today announced development of a new generation of design functions in an ASIC library for electro-optical interface ICs for passive optical networks (PON). In addition, the Graz-based company said it has created a new chip set, called Key Electro-Optical Elements (KEOPE), which will be fabricated in a high-speed, low-power silicon-germanium (SiGe) technology.
The new chip set is aimed at serving advanced burst mode transmitters and receivers on passive opitcal networks (PONs), said austriamicrosystems.
The Austrian ASIC and foundry supplier noted that in PON systems light bursts received at the core side of the network have different amplitudes and timing, because they originate from many optical network units (ONUs), which can be placed at different distances from the optical line termination (OLT) center. Therefore the signal thresholds and amplification levels must be changed very rapidly at the receiver, said the company.
In KEOPE chip set, this capability has been achieved by integrating very fast and precise 11-bit digital-to-analog converters, which control transmission power, receiver thresholds and gain levels, said austriamicrosystems. The receiver amplifier features an input current dynamic range of 67 dB, the company said.
The chips use a serial peripheral interface (SPI) microcontroller link to provide fast reconfiguration and self-calibration of the circuits in the PON applications, according to the company, which said the chip set is fully compliant with ITU-T recommendation G.983.
The new KEOPE ASIC library also has been developed to offer blocks for burst-mode electro-optical interfaces. The company said the library can be used to develop and produce custom optical ASICs made with SiGe technology in less than six months.
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