Cognet Microsystems Announces the 3.125Gbps PMD Layer Chip Set in Pure CMOS; Novel Architecture Enables Low Cost Integrated Solutions for 2.5/3.125Gbps Applications.Business Editors LOS ANGELES--(BUSINESS WIRE)--Aug. 28, 2000 Cognet Microsystems, a provider of high-speed fiber optic solutions to the data networking and telecommunications industry, today announced the first complete 2.5/3.125Gbps Physical Media Dependent (PMD (Polarization Mode Dispersion) The type of dispersion that occurs in singlemode fiber due to a lack of perfect symmetry in the fiber and from external pressures on the cable. Light travels over singlemode fiber in two polarization states. ) layer chip-set manufactured in standard Complementary Metal Oxide Semiconductor See CMOS. (integrated circuit) Complementary Metal Oxide Semiconductor - (CMOS) A semiconductor fabrication technology using a combination of n- and p-doped semiconductor material to achieve low power dissipation. (CMOS (Complementary Metal Oxide Semiconductor) Pronounced "c-moss." The most widely used integrated circuit design. It is found in almost every electronic product from handheld devices to mainframes. ) process technology. This highly advanced chip set will enable manufacturers to build low-cost 2.5/3.125Gbps fiber optic modules. The chip-set consists of a preamplifier Preamplifier A voltage amplifier suitable for operation with a low-level input signal. It is intended to be connected to another amplifier with a higher input level. , a limiting amplifier, and a laser driver. Using proprietary circuit designs, Cognet can manufacture chips using the standard CMOS process that meet or exceed standard specifications. The preamplifier and limiting amplifier utilize Cognet's proprietary Broadband Cascade Amplifier (BCA BCA Business Case Analysis BCA Building Code of Australia BCA Boeing Commercial Airplanes BCA Board of Contract Appeals BCA Boston Center for the Arts BCA Billiard Congress of America BCA Bureau of Criminal Apprehension BCA Breast Cancer Action (TM)) technology. BCA(TM) allows CMOS to achieve broadband performance previously attained only through bipolar or GaAs processes. "No other vendor has been able to achieve the required performance, speed and functionality in a pure CMOS process. Competitor's products are based on the Gallium Arsenide or BiCMOS processes, which cost more than CMOS," said K. Joseph Sikias, Director of Sales and Marketing at Cognet. "Our mixed-mode CMOS designs drastically reduce manufacturing cost, and will allow integration of analog and digital functionality onto a single chip for even further cost reductions." The CN3000TV laser driver provides up to 40mA of modulation current at both 2.5 Gbit/s and 3.125 Gbit/s that could support either a short wavelength Vertical Cavity Surface Emitting Laser (VCSEL (Vertical Cavity Surface Emitting Laser) Pronounced "vixel." A type of laser diode that emits light from its surface rather than its edge. A VCSEL's circular beam is easy to couple with a fiber, and due to its surface-emission architecture, can be tested ) or a long wavelength edge-emitting laser such as the Fabry-Perot (FP) or the Distributed Feedback (DFB DFB acronym for dark, firm, dry meat. Called also dark cutting beef. ) Laser. The CN3000TV features on-chip circuitry for automatic control of the laser's average power and modulation level. The laser driver's modulation current has a programmable temperature coefficient that allows customers to compensate for changes in laser diode's slope efficiency with temperature. The CN3000RL limiting amplifier employs BCA(TM) technology to achieve more than 40dB gain and better than 5mV sensitivity and hosts on-chip Loss of Signal (LOS) circuitry. The CN3000RT preamplifier, also utilizing BCA(TM) technology, features on-chip automatic gain control circuitry that attains an optical dynamic range better than 26dB. All devices in the chip set operate with a +3.3V supply and are currently available in sample quantities. About Cognet Microsystems Cognet Microsystems was founded in 1999 with a vision to become a leading supplier of fiber optic solutions for multi-gigabit networks. Cognet's products include integrated circuits and WDM (1) (Wavelength Division Multiplexing) A technology that uses multiple lasers and transmits several wavelengths of light (lambdas) simultaneously over a single optical fiber. optical components. Cognet is based in Los Angeles and may be contacted by phone at 310/231-8242; or via email at info@cognetmicro.com; or visit the Web site at www.cognetmicro.com. Note: Please visit Cognet at NFOEC NFOEC National Fiber Optical Engineer Conference NFOEC National Fiber Optic Engineers Conference in Denver, Booth No. 2025. |
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