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Title: Photoconductive circuit element reflectometer

Abstract

A photoconductive reflectometer is described for characterizing semiconductor devices at millimeter wavelength frequencies where a first photoconductive circuit element (PCE) is biased by a direct current voltage source and produces short electrical pulses when excited into conductance by short first laser light pulses. The electrical pulses are electronically conditioned to improve the frequency related amplitude characteristics of the pulses which thereafter propagate along a transmission line to a device under test. Second PCEs are connected along the transmission line to sample the signals on the transmission line when excited into conductance by short second laser light pulses, spaced apart in time a variable period from the first laser light pulses. Electronic filters connected to each of the second PCEs act as low-pass filters and remove parasitic interference from the sampled signals and output the sampled signals in the form of slowed-motion images of the signals on the transmission line. 4 figs.

Inventors:
Publication Date:
OSTI Identifier:
7266757
Patent Number(s):
US 4896109; A
Application Number:
PPN: US 7-129210
Assignee:
Dept. of Energy, Washington, DC (United States)
Resource Type:
Patent
Resource Relation:
Patent File Date: 7 Dec 1987
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; OPTICAL EQUIPMENT; DESIGN; SEMICONDUCTOR DEVICES; PERFORMANCE TESTING; ELECTRIC FILTERS; LASER RADIATION; SIGNAL CONDITIONING; ELECTROMAGNETIC RADIATION; EQUIPMENT; FILTERS; RADIATIONS; TESTING; 426000* - Engineering- Components, Electron Devices & Circuits- (1990-); 420500 - Engineering- Materials Testing

Citation Formats

Rauscher, C. Photoconductive circuit element reflectometer. United States: N. p., 1990. Web.
Rauscher, C. Photoconductive circuit element reflectometer. United States.
Rauscher, C. 1990. "Photoconductive circuit element reflectometer". United States.
@article{osti_7266757,
title = {Photoconductive circuit element reflectometer},
author = {Rauscher, C},
abstractNote = {A photoconductive reflectometer is described for characterizing semiconductor devices at millimeter wavelength frequencies where a first photoconductive circuit element (PCE) is biased by a direct current voltage source and produces short electrical pulses when excited into conductance by short first laser light pulses. The electrical pulses are electronically conditioned to improve the frequency related amplitude characteristics of the pulses which thereafter propagate along a transmission line to a device under test. Second PCEs are connected along the transmission line to sample the signals on the transmission line when excited into conductance by short second laser light pulses, spaced apart in time a variable period from the first laser light pulses. Electronic filters connected to each of the second PCEs act as low-pass filters and remove parasitic interference from the sampled signals and output the sampled signals in the form of slowed-motion images of the signals on the transmission line. 4 figs.},
doi = {},
url = {https://www.osti.gov/biblio/7266757}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {1}
}