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- Study of Beat Frequencies - Modeling and Reducing the Effect in Switch-Mode DC Power Conversion Systems
- Beat frequencies are defined as the sum and the difference of two different frequencies from nonlinear property in a system for example from frequency modulation. The frequency modulation exists in systems with switch-mode power supplies from certain configurations. This study is to discover the existence conditions that switch-mode power supplies...
- White papers 2003-12-02
Additional Resources
- Frequency-Modulation Spectroscopy With Blue Diode Lasers
- Diode laser absorption spectroscopy based on frequency modulation FM is a commonly used method for fast and ultra sensitive detection of minute concentrations of gas. The interaction between a modulated laser field and an absorbing sample leads to the generation of an absorption-related signal that can be detected at the...
- White papers 2000-07-20
- NIST develops phase-modulation servos for atomic clocks - News Briefs - National Institute of Standards & Technology - Brief Article
- NIST scientists in Boulder, in collaboration with he Jet Propulsion Laboratory JPL, have developed an improved modulation method for laser-cooled atomic clocks, providing for a high level of immunity to vibrations and substantial reduction of a number of systematic frequency shifts that can affect these clocks. The concept involves phase...
- Research articles 2001-09-01
- nanoNET: Chirp-Based Wireless Networks
- The sophisticated wireless communication systems must guarantee; High quality transmissions; Effective use of precious channel capacity; Cost-effectiveness; Low power consumption. Three well known modulation technologies Amplitude Modulation or AM, Frequency Modulation or FM, and Phase Modulation or PM - can be combined into a universal and superior communication method called...
- White papers 2004-05-11
- Instrument measures dynamic frequency and time-interval behavior. (H-P's HP 53310A modulation-domain analyzer) (product announcement)
- When you want to know how a voltage varies with time, an oscilloscope can usually give you the information you need. When you want to know how a frequency or time interval varies with time, you need a different type of instrument. Hewlett-Packard, t When...
- Research articles 1991-01-03
- FCC Unleashes Digital Modulation.(Government Activity)
- Forget those pesky spread spectrum rules! Starting soon, the FCC won't even ask about processing gain. Frequency hoppers can skip over crowded parts of the band. Most striking of all, the FCC will soon permit unlicensed radios using any digital modulation at all, running at tens...
- Research articles 2001-06-01
- High Efficiency PFM/PWM Step-Down, Buck, Regulator/Controller Offers Higher Current Output in a Small Package
- MOUNTAIN VIEW, Calif.--BUSINESS WIRE--Aug. 31, 1999-- TelCom Semiconductor, Inc. (NASDAQ: TLCM) today announced the TC120, a 300KHz PFM/PWM step-down Buck DC/DC regulator/controller combination for use in systems operating from two or more cells, or in line-powered applications. The TC120 offers higher current output in a space saving SOP...
- Research articles 1999-08-31
- Anritsu adds new models and microwave IQ modulation port to synthesiser family to offer broadband coverage.
- M2 PRESSWIRE-21 August 2002-ANRITSU: Anritsu adds new models and microwave IQ modulation port to synthesiser family to offer broadband coverage C1994-2002 M2 COMMUNICATIONS LTD RDATE:08212002 Anritsu has added three new CW generators to its MG3690A series, creating the industry's...
- Research articles 2002-08-21
- Philips Semiconductors Introduces DC/DC Converter for Mobile Telephony Markets; Device Extends Unsurpassed Battery Life for Cordless & Cellular Telephones
- SUNNYVALE, Calif.--BUSINESS WIRE--Dec. 16, 1996--Philips Semiconductors today introduced a unique low-voltage DC/DC converter with a peak outTEA1204t progressively switches between three different pulse width settings as the output current increases, and employs pulse frequency modulation within each setting techniques used in the TEA1204t, it achieves u mobile phones.
- Research articles 1996-12-16
- Chancellor, CBS retune FM losers in radio face-off. (CBS Corp.; Chancellor Media Corp.; frequency modulation)
- Fight for supremacy in classic rock has Madison Ave., Wall St. watching CBS Corp. owns five of the top 10 revenue-generating radio stations in New York--but that's not good enough. Chancellor Media Corp., its archrival, has three FM powerhouses,Fight for...
- Research articles 1998-01-26
- Conexant Introduces World's First Dual-Channel 8PSK and DVB-S2 Advanced Modulation Satellite Tuner; Company Sets Industry Record with Cumulative Tuners/Demodulators Shipments Exceeding 120 Million
- NEWPORT BEACH, Calif. -- Conexant Systems, Inc. (NASDAQ:CNXT), a worldwide leader in semiconductor solutions for broadband communications, enterprise networks and the digital home, today announced the world's first dual-stream radio frequency RF satellite tuner. The low-power, direct down conversion CX24128 is intended for high-volume set-top box STB receivers used for...
- Research articles 2005-06-20
- Digital Picture Clears Up As NAB Supports 8-VSB.(National Association of Broadcasters supports radio frequency modulation standard)(Brief Article)
- After a spate of studies and tests, the National Association of Broadcasters and the Association for Maximum Service Television MSTV reaffirmed their endorsement of the Federal Communications Commission-approved 8-VSB vestigal sideband modulati After a spate of studies and tests, the National Association of ...
- Research articles 2001-01-22
- Fairchild Semiconductor's Green FPS™ Power Switches Increase Efficiency and Reduce EMI in Power Supply Designs
- SAN JOSE, Calif. -- Fairchild Semiconductor (NYSE: FCS) helps designers reach high efficiency levels to meet stringent energy efficiency standards, low-standby power and EMI regulations worldwide with their new Green FPS switches, the FSQ0765R and FSQ0565R. These power switches feature Fairchild's proprietary valley switching, hybrid control and inherent frequency modulation,...
- Research articles 2007-11-16
- FMs.(Deals)(Hanson Broadcasting Co. Inc., San Diego State University, Frequency Modulation)(Brief Article)
- KQVOFM CALEXICO, CALIF. PRICE: $1.1 million BUYER: San Diego State University (Doug Myrland, general manager); owns one other station, none in this market SELLER: Hanson Broadcasting Co. Inc. (Elana Hanson, president)...
- Research articles 2004-11-22
- NYQUIST QUADRATURE FREQUENCY SHIFT KEYING FOR SPECTRAL EFFICIENCY.
- The selection of a data modulation scheme for radio transmission usually involves a trade among a number of parameters, including communications efficiency (bit error rate BER vs. signal-to-noise ratio), bandwidth efficiency and factors affecting the prime power efficiency of the transmitter output stage. If the transmitter...
- Research articles 2001-03-01
- Coding and Modulation for LMDS and Analysis of the LMDS Channel
- Local Multipoint Distribution Service LMDS has the potential to become a viable alternative to coaxial cable, fiber and other wired and wireless technologies providing "last mile" communication services. A major obstacle, however, is the high equipment cost. While for example cable modems supporting two-way services are available for $200 to...
- Research articles 2000-09-01
- DC/DC buck regulator.(Sipex Corp's SP6650)(Brief Article)(Product Announcement)
- * Uses proprietary pulse-frequency-modulation control to achieve maximum efficiencies of 95% over 50 to 500 mA * Provides a fixed 3.3V output or a programmable output of 2.8 and 6.5V * Comes in a 10-pin MSOP...
- Research articles 2001-06-21
- FMs.(frequency modulation,)(Educational Media Foundation acquires radio stations from 2510 Licenses LLC)(Brief Article)
- WKVBFM PORT MATILDA STATE COLLEGE AND WLKJFM PORTAGE JOHNSTOWN, PA. PRICE: $2.3 million BUYER: Educational Media Foundation (Richard Jenkins, president); owns 162 other stations, none in this market SELLER: 2510...
- Research articles 2006-02-06
- Measuring And Troubleshooting For IEEE 802.16e OFDMA
- THE MEASUREMENT AND troubleshooting of orthogonal- frequency-division-multiple-access OFDMA or mobile-WiMAX signals, components, and systems is not limited to digital demodulation or modulation-quality analysis. In fact, some of the most productive typeTHE MEASUREMENT AND troubleshooting of orthogonal- frequency-division-multiple-access OFDMA or mobile-WiMAX signals, components, and systems is not limited to digital demodulation...
- Research articles 2007-02-01
- Photonic radio gets closer.(government contracts)(Brief Article)
- The DARPA Defense Advanced Research Projects Agency has awarded a contract to Phasebridge Inc to further the development of an optical RF QPSK (quadrature-phase-shift-keying)--modulation technique for use in ultrawideband, frequency-agile, milita The DARPA Defense Advanced Research Projects Agency has awarded a contract to...
- Research articles 2005-08-18
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