ANADIGICS Patents Power Amplifier Technology.WARREN, N.J.--(BUSINESS WIRE)--May 12, 1999-- High-performance power amplifier Power amplifier The final stage in multistage amplifiers, such as audio amplifiers and radio transmitters, designed to deliver appreciable power to the load. technology implemented as a single-chip solution is awarded US Patent ANADIGICS announced today that it recently received a patent for its on-chip single-polarity power supply technology for power amplifiers that enables designers of cellular telephones to take advantage of high performing GaAs MESFET See FET. technology in a single-chip power-amplifier solution. The patent, (US5892400) entitled "Amplifier using a single polarity power supply and including depletion mode Refers to a transistor that is normally closed (on), allowing current to pass, but is triggered to open (off) and impede current. Contrast with "enhancement mode," wherein the transistor is normally open (off), but is triggered to close (on). FET FET: see transistor. (Field Effect Transistor) One of two major categories of transistor; the other is bipolar. FETs use a gate element that, when charged, creates an electromagnetic field that changes the conductivity of a silicon and negative voltage generator," reflects ANADIGICS continuing commitment to research and development and technical innovation. ANADIGICS has implemented this technology into many of its power amplifier designs since its development in 1996. "Implementing this technology increased the overall functionality and ease of use for next-generation power amplifiers," observes Robert Bayruns, Vice President of Advanced Development, ANADIGICS Inc. "This innovation is an example of ANADIGICS' commitment to being a technological leader for our customers - supplying their designs with better performance, lower cost, and more integration." The high-resistivity GaAs substrate provides a way to simplify the DC-to-DC converter function as compared to typical silicon implementations. The new power amplifier design combines a switched-capacitor DC-to-DC converter with a level-shifting gate bias circuit that acts as a voltage regulator An electronic circuit used to maintain a level amount of voltage in an electrical line. It eliminates power surges, spikes and brownouts, which can cause harm to sensitive electronics. A voltage regulator "module" (VRM) is a voltage regulator in a replaceable unit. See surge suppression and UPS. . A current mirror regulates the negative supply, allowing constant output under challenging conditions such as high mismatch and/or temperature. By combining high-performance on-chip capacitors with low-current MESFET switches, ANADIGICS designers could also realize a low standby current for the circuit. "This technology provides designers with the outstanding performance associated with GaAs MESFET technology combined with the convenience and cost-effectiveness of a reduced component count," explains Bayruns. "By including an on-chip negative voltage supply for gate bias, this technology eliminated the need for an external DC-to-DC converter IC." Note: US Patent No. 5892400 does not cover ANADIGICS Microwave DC-to-DC converter, recently reported by the Trade Press. ANADIGICS Microwave DC-to-DC converter is patent pending. ANADIGICS designs and manufactures radio frequency 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 (RFIC RFIC Radio Frequency Integrated Circuit RFIC Radio Frequency Interface Chip ) solutions for growing broadband and wireless communications wireless communications System using radio-frequency, infrared, microwave, or other types of electromagnetic or acoustic waves in place of wires, cables, or fibre optics to transmit signals or data. markets. The Company's innovative high frequency RFICs enable manufacturers of communications equipment to enhance overall system performance by reducing the size and weight of their products, increasing power efficiency, improving reliability, and reducing manufacturing cost and time to market. By utilizing state of the art manufacturing processes for its RFICs, ANADIGICS achieves the high-volume, low-cost manufacturing required by leading companies in its targeted high-growth communications markets. ANADIGICS 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 www.anadigics.com |
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