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varactor

The Columbia Encyclopedia, Sixth Edition
varactor see diode . Author not available, VARACTOR., The Columbia Encyclopedia, Sixth Edition 2008... Read more
diode
The Columbia Encyclopedia, Sixth Edition ... of characteristics. A thermistor is a special semiconductor diode whose conductivity increases with the diode temperature. A varactor, or varicap, exhibits a capacitance that is dependent upon the voltage across it. In an Esaki, or tunnel, diode, the current ... Read more
capacitor
The Columbia Encyclopedia, Sixth Edition ... thus increasing or decreasing the capacitance. These devices have largely been replaced by frequency synthesizers and a special type of solid-state diode , known as a varactor, whose capacitance changes with the reverse-biased voltage across it. Read more

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Related newspaper, magazine, and journal articles from HighBeam Research

Switch, varactor meet Bluetooth requirements
Microwaves & RF; 1/1/2000; Heftman, Gene; 394 words ; ... SMV1763-079 hyperabrupt junction-tuning varactor diode (Fig. 2). Designed for a frequency ... and 500,-MHz bandwidth. The SMV1763-079 varactor is available as a miniature SC-79 two-le ... characteristic varies from 9.0 pF at a varactor voltage VR of 0 V to 1.8 pF at a VR of ... Read more
The varactor power frequency multiplier. (Technical Feature)
Microwave Journal; 5/1/1990; Peterson, Dean F.; 4939 words ; The Varactor Power Frequency Multiplier Introduction The varactor frequency multiplier continues to be an important device ... mm-wave power. Advances in the design and fabrication of varactor diodes, combined with the increased power level and ... Read more
A stub-mounted varactor for VCO design. (voltage-controlled oscillators) (technical feature)
Microwave Journal; 10/1/1989; Halim, M.A.; 1350 words ; A Stub-Mounted Varactor for VCO Design A simple transformation has been derived ... voltage-controlled oscillators using transmission line varactor resonators. Introduction Varactors most commonly are used to tune solid-state microwave voltage-controll ... Read more
A varactor-tuned oscillator using MMIC technology. (monolithic microwave integrated circuits)
Microwave Journal; 9/1/1990; Roth, B. Joseph, M. Beyer, A.; 1277 words ; A Varactor-Tuned Oscillator Using MMIC Technology ... feedback. Coupling is realized by a GaAs varactor that is integrated on the same substrate ... the resonant circuit and the feedback varactor. The chip performance has been predicted ... Read more
A mm-wave high power monolithic back-to-back varactor diode frequency tripler.
Microwave Journal; 5/1/1993; Hwu, R.J.; 4866 words ; ... mm-wave high power monolithic back-to-back varactor diode frequency triplers is discussed, including the operation of a back-to-back varactor diode frequency tripler and the design ... difficult problem. High power monolithic varactor diode frequency multipliers have been ... Read more
Switching-regulator supply provides low-noise biasing for varactor diodes.(Technology Information)
EDN; 11/9/2000; Williams, Jim Beebe, David; 3003 words ; ... AN APPLICATION AS NOISE-SENSITIVE AS VARACTOR-DIODE BIASING, A CAREFULLY PLANNED SWITCHING-REGULATOR-B ... oscillator. The actual tuning element is a varactor diode, which is a two-terminal device ... the high voltage necessary to bias the varactor, which closes a feedback loop by voltage ... Read more
Custom varactor diode eliminates inductors in VCXO designs
Microwaves & RF; 5/1/1997; Battershall, Barry W; Thomann, Donald; 1134 words ; These specialized varactor diodes provide wide tuning ranges ... the authors recognized that if the varactor diode's capacitance-versus-voltage ... recently to manufacture these customized varactor diodes, helping to effectively shrink ... Read more
Software designs varactor diodes. (MMICAD from Optotek Ltd.) (Product Announcement)
Microwave Journal; 4/1/1992; 486 words ; ... microwave design engineers in designing a varactor diode with linear tuning characteristics ... voltage-controlled oscillators is dictated by the varactor diode tuning characteristic. In the past ... to specify a C-V specification for a varactor tuning diode that will produce optimum ... Read more
A Varactor-tuned oscillator with linear tuning characteristic. (Technical Feature).
Microwave Journal; 2/1/2002; Seo, Munkyo Lee, Joo-Yeol Lee, Kyung-Kuk Nam, Sangwook; 2687 words ; ... speed restricts their usefulness. (1) Varactor-tuned oscillators (VTO), on the other ... D. Peterson, for example, suggests a varactor doping profile (3) which is capable of ... focuses on the optimum selection of a varactor and the design of its coupling network ... Read more
A wideband, varactor-tuned microstrip VCO.
Microwave Journal; 6/1/1999; Vidmar, Matjaz; 2101 words ; ... than one octave, the tuning range of varactor-tuned VCOs is much more restricted. Furthermore, all available varactors are rather lossy capacitors with low ... noise of the oscillator. Wideband, varactor-tuned microwave VCOs are usually built ... Read more

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