Results 181 to 190 of about 1,302 (222)

An efficient technique for varactor diode characterization

Proceedings of 40th Midwest Symposium on Circuits and Systems. Dedicated to the Memory of Professor Mac Van Valkenburg, 2002
An efficient technique for varactor diode characterization is presented. The varactor model is developed using nonlinear CAD tool. Simulation shows excellent agreement with measured data.
D.Q. Xu, G.R. Branner
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Varactor Diode Impedance Measurements†

Journal of Electronics and Control, 1964
ABSTRACT A comparison is made between impedance data obtained by two different methods for a coaxially encapsulated varactor diode. In one of these the impedances are normalized to the series resistance of the diode and in the other to the characteristic impedance of the measuring line. The agreement between the two sets of data is good.
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Microwave Applications of Diodes, Varactors and Tunnel Diodes

1980
Diodes provide many circuit functions (e. g., detection of signals, modulation of carrier frequencies with signal frequencies and subsequent demodulation) at high frequencies. Diodes are also used as RF switches and as harmonic generators for efficient frequency multiplication.
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Design considerations of hyperabrupt varactor diodes

IEEE Transactions on Electron Devices, 1971
This paper describes the design calculations and fabrication techniques used to produce hyperabrupt varactor diodes. The computation consists of determining, the doping profile, the capacitance as a function of applied voltage, the breakdown voltage, and the series resistance; allowance is made for the nonlinear variation of mobility with doping ...
P.J. Kannam, S. Ponczak, J.A. Olmstead
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p-i-n and varactor diodes

1993
Semiconductor diodes were one of the first electronic components for ensuring the basic function of RF detection, and they are still used for that purpose (as well as for mixers) even if galena (natural PbS) has been replaced by Silicon and by gallium arsenide, and the Schottky technology has definitively taken the place of the ancient ‘cat’s whisker ...
C. Straelhi, J. V. Bouvet, D. Goral
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A TV tuner using varactor diodes†

International Journal of Electronics, 1974
Design procedures for a TV tuner using varactor diodes are given. The problem of conflicting needs between power matching and noise figure matching is presented. Experimental results obtained agree well with theoretical values. The measured noise figure of the tuner is 4.5 dB.
MAHAPATRS, JAIN, MR
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Characteristics of an area-variable varactor diode

IEEE Transactions on Microwave Theory and Techniques, 1996
Photoresponses and microwave characteristics of an area-variable varactor diode are investigated in the frequency range of 1-7 GHz. The on/off ratio of the capacitance as large as 18.5 at 1 GHz is demonstrated and it is shown that the ratio strongly depends upon the access resistance between the cathode and the floating contacts. The capacitance of the
null Dong-Wook Kim, null Jae-Jin Lee, null Young-Se Kwon, null Song-Cheol Hong   +3 more
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Generalized mathematical model of the varactor diode

2003 Siberian Russian Workshop on Electron Devices and Materials. Proceedings. 4th Annual (IEEE Cat. No.03EX664), 2004
This paper considers a generalized mathematical model of a varactor diode, taking into account the effect of charge accumulation in the base of the diode, and the nonlinear dependency of the consequent diode resistance from its associated voltage.
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Transient responses of varactor diodes

Proceedings of the IEEE, 1966
C.Q. Lee, R.H.F. Yang
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Varactor Diode Q-factor Measurements†

Journal of Electronics and Control, 1963
ABSTRACT The Q-factor, capacitance and resistance of the semiconductor region, can be obtained by a simple extension of the technique described by Harrison.
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