ANADIGICS Receives CATV Circuit Patent For Low Cost Upconverter Chip.WARREN, N.J.--(BUSINESS WIRE)--Sept. 22, 1997--ANADIGICS has been awarded its eleventh patent for a monolithic upconverter integrated circuit integrated circuit (IC), electronic circuit built on a semiconductor substrate, usually one of single-crystal silicon. The circuit, often called a chip, is packaged in a hermetically sealed case or a nonhermetic plastic capsule, with leads extending from it for . The patent, U.S. Patent No. 5,625,307, entitled "Low Cost Monolithic GaAs Upconverter Chip," was granted to Norman Scheinberg, Chief Scientist. The announcement also marks the second patent received by ANADIGICS this year. The patent covers the monolithic upconverter integrated circuit that performs the first frequency conversion of a dual conversion cable television (CATV (Community Antenna TV) The original name for cable TV. It used a single antenna at the highest location in the community in order to deliver a quality signal to homes in areas with hilly terrain or other interference. ) receiver. This upconverter chip includes three functional blocks: an image-rejecting mixer, a phase splitter 1. (Elec.) A device by which a single-phase current is split into two or more currents differing in phase. It is used in starting single-phase induction motors. , and a voltage-controlled oscillator A voltage-controlled oscillator or VCO is an electronic oscillator designed to be controlled in oscillation frequency by a voltage input. The frequency of oscillation is varied by the applied DC voltage, while modulating signals may also be fed into the VCO to cause . Mixing is performed by a novel Gilbert type mixer, which includes image-reduction inductors to improve the noise figure of the mixer. "A differential circuit topology allows the monolithic upconverter chip to use a plastic dual inline package without considerable performance loss," Scheinberg said. "On-chip RF bypass networks, in the form of series RC terminations, also help compensate for the undesirable effects of pin inductances in the dual inline package. A resistor-based DC biasing scheme dramatically reduces power-up latency, allowing for faster testing." "I am pleased with the latest patent for ANADIGICS' cable television group," said Ron Michels, Director, Television Product Development. "As the cable television industry moves forward, ANADIGICS will continue providing solutions to its customers by developing chip-sets that offer ease of use when designing set-top boxes, cable modems and distribution solutions." Founded in 1985, ANADIGICS is a pioneer in the manufacture of gallium arsenide An alloy of gallium and arsenic compound (GaAs) that is used as the base material for chips. Several times faster than silicon, it is used in high frequency applications such as cellphones, DVD players and fiber optics. integrated circuits Integrated circuits Miniature electronic circuits produced within and upon a single semiconductor crystal, usually silicon. Integrated circuits range in complexity from simple logic circuits and amplifiers, about 1/20 in. (1. for high volume communications applications. ANADIGICS components are the enabling technology for many of today's products used in consumer electronic applications, including mobile telephones, cable television set top boxes, direct broadcast satellite TV receivers, fiber-optic data transmission systems, and other advanced communications networks. To date, ANADIGICS has delivered over 70 million GaAs ICs and was the first GaAs IC manufacturer to receive ISO (1) See ISO speed. (2) (International Organization for Standardization, Geneva, Switzerland, www.iso.ch) An organization that sets international standards, founded in 1946. The U.S. member body is ANSI. 9001 Certification. For more information on ANADIGICS, visit the company's web site at http://www.anadigics.com. CONTACT: Allan S. Fliss/Debra Norman 201/299-0070 dnorman@richartz-fliss.com |
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