Journal ArticleDOI
A small-signal theory of avalanche noise in IMPATT diodes
H.K. Gummel,J.L. Blue +1 more
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TLDR
In this paper, a general small-signal theory of the avalanche noise in IMPATT diodes is presented, which is applicable to structures of arbitrary doping profile and uses realistic (α \neq \beta in Si) ionization coefficients.Abstract:
A general small-signal theory of the avalanche noise in IMPATT diodes is presented. The theory is applicable to structures of arbitrary doping profile and uses realistic ( \alpha \neq \beta in Si) ionization coefficients. The theory accounts in a self-consistent manner for space-charge feedback effects in the avalanche and drift regions. Two single-diffused n-p diodes of identical doping profile, one of germanium and the other of silicon, are analyzed in detail. For description of the noise of the diodes as small-signal amplifiers the noise measure M is used. Values for M of 20 dB are obtained in germanium from effects in the depletion region only, i.e., when parasitic end region resistance is neglected. Inclusion of an assumed parasitic end resistance of one ohm for a diode of area 10-4cm2produces the following noise measure at an input power of 5×104W/cm2, and at optimum frequency: germanium 25 dB, silicon 31 dB. For comparison, a noise figure of 30 dB has been reported [1] for a germanium structure of the same doping profile as used in the calculations. Measurements of silicon diodes of the same doping profile are not available, but typically silicon diodes give 6-8 dB higher noise figures than germanium diodes of comparable doping profile.read more
Citations
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Journal ArticleDOI
Electron and hole ionization rates in epitaxial silicon at high electric fields
TL;DR: In this article, the ionization rates for electrons and holes were extracted from photomultiplication measurements on silicon p+n mesa diodes for electric fields of 2·0 × 105−7·7 × 105 V/cm at temperatures of 22, 50, 100 and 150°C.
Journal ArticleDOI
Noise in solid-state devices and lasers
TL;DR: In this article, a survey of the most important noise problems in solid-state devices is given, including shot noise in metal-semiconductor diodes, p-n junctions, and transistors at low injection.
Journal ArticleDOI
Microwave avalanche diodes
S.M. Sze,R.M. Ryder +1 more
TL;DR: A brief review summarizes mechanisms of operation, power output, efficiency, noise, and some important features of design and fabrication of microwave avalanche diodes of various types.
Journal ArticleDOI
Prospects of IMPATT devices based on wide bandgap semiconductors as potential terahertz sources
Aritra Acharyya,J. P. Banerjee +1 more
TL;DR: In this article, the potentiality of impact avalanche transit time (IMPATT) devices based on different semiconductor materials such as GaAs, Si, InP, 4H-SiC and Wurtzite-GaN was explored for operation at terahertz frequencies.
Journal ArticleDOI
GaN IMPATT diode: a photo-sensitive high power terahertz source
TL;DR: In this article, the performance of the GaN IMPATT diodes in the terahertz regime was investigated using a modified double iterative simulation technique and the effect of photo-illumination on the devices was investigated.
References
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Journal ArticleDOI
A proposed high-frequency, negative-resistance diode
TL;DR: In this paper, a semiconductor diode designed to operate as an oscillator when mounted in a suitable microwave cavity is described and analyzed, and it appears possible to obtain over 20 watts of ac power in continuous operation at 5 kmc.
Journal ArticleDOI
AVALANCHE BREAKDOWN VOLTAGES OF ABRUPT AND LINEARLY GRADED p‐n JUNCTIONS IN Ge, Si, GaAs, AND GaP
Simon M. Sze,G. Gibbons +1 more
Journal ArticleDOI
Electronic tuning effects in the read microwave avalanche diode
M. Gilden,M.E. Hines +1 more
TL;DR: In this article, the negative-resistance avalanche diode has been examined in detail for the small-signal case and the space-charge wave approach has been used in the analysis leading directly to a simple equivalent circuit.
Journal ArticleDOI
Noise theory for the read type avalanche diode
TL;DR: In this paper, an analysis for the noise current spectrum of an avalanche diode under assumed conditions of ideal uniform avalanche behavior in a zone which is thin compared with the total high-field depletion zone is presented.
Journal ArticleDOI
Avalanche region of impatt diodes
H. K. Gummel,D.L. Scharfetter +1 more
TL;DR: In this paper, the authors extended the calculations of Gilden and Hines for the current fraction to include phase shifts in the avalanche region so that extended avalanche regions can be considered, and showed that an optimal exponential growth rate of oscillations is obtained when the current density is such that the resonance frequency is about equal to one half the reciprocal transit time through the longest drift region.