NDLI: A germanium space-charge-limited triode

Content Provider	IEEE Xplore Digital Library
Author	Shumka, A.
Copyright Year	1967
Description	Author affiliation: Jet Propulsion Laboratory, Pasadena, Calif. (Shumka, A.)
Abstract	An experimental solid-state triode directly analogous to a vacuum-tube triode is described. Control and modulation of the flow of space-charge-limited (SCL) electron currents in germanium have been achieved by inserting a control electrode into an n+πn+ solid-state diode. This electrode consists of a set of closely spaced p+ stripes that are capacitively coupled with the emitter and collector. Results indicate that the control electrode modulates the current flow in a manner analogous to that of the grid electrode in a vacuum-tube triode. The SCL current obeys the three-halves power law as predicted for a field-dependent mobility of the form\micro = \micro o(E_{c}/E)^{1/2}where\micro0 is the low field mobility and Ecthe critical electric field. An analysis of the I-V characteristics of the fabricated solid-state triodes reveals that these structures are capable of exhibiting a high transconductance, a large amplification factor, and an input impedance greater than a megohm. An important advantage of such a device is a potentially low noise figure as predicted by theory. Other attractive features of the device, such as a low sensitivity to temperature changes and an expected high frequency response, will also be discussed.
Starting Page	136
Ending Page	138
File Size	189543
Page Count	3
File Format	PDF
DOI	10.1109/IEDM.1967.187898
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1967-10-18
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Germanium Electrodes Solid state circuits Electrons Diodes Transconductance Impedance Noise figure Temperature sensors Frequency response
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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