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Title: DETECTOR FOR MODULATED AND UNMODULATED SIGNALS

Abstract

An r-f signal-detecting device is described, which is embodied in a compact coaxial circuit principally comprising a detecting crystal diode and a modulating crystal diode connected in parallel. Incoming modulated r-f signals are demodulated by the detecting crystal diode to furnish an audio input to an audio amplifier. The detecting diode will not, however, produce an audio signal from an unmodulated r-f signal. In order that unmodulated signals may be detected, such incoming signals have a locally produced audio signal superimposed on them at the modulating crystal diode and then the"induced or artificially modulated" signal is reflected toward the detecting diode which in the process of demodulation produces an audio signal for the audio amplifier.

Inventors:
;
Issue Date:
Research Org.:
Originating Research Org. not identified
OSTI Identifier:
4203469
Patent Number(s):
2901613
Assignee:
U.S. Atomic Energy Commission DTIE; NSA-14-006490
NSA Number:
NSA-14-006490
Resource Type:
Patent
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-60
Country of Publication:
United States
Language:
English
Subject:
ENGINEERING AND EQUIPMENT; AMPLIFIERS; CIRCUITS; DETECTION; INSTRUMENTS; MODULATION; RADIO WAVES; SEMICONDUCTORS; SIGNALS; SOUND

Citation Formats

Patterson, H.H., and Webber, G.H. DETECTOR FOR MODULATED AND UNMODULATED SIGNALS. United States: N. p., 1959. Web.
Patterson, H.H., & Webber, G.H. DETECTOR FOR MODULATED AND UNMODULATED SIGNALS. United States.
Patterson, H.H., and Webber, G.H. Tue . "DETECTOR FOR MODULATED AND UNMODULATED SIGNALS". United States.
@article{osti_4203469,
title = {DETECTOR FOR MODULATED AND UNMODULATED SIGNALS},
author = {Patterson, H.H. and Webber, G.H.},
abstractNote = {An r-f signal-detecting device is described, which is embodied in a compact coaxial circuit principally comprising a detecting crystal diode and a modulating crystal diode connected in parallel. Incoming modulated r-f signals are demodulated by the detecting crystal diode to furnish an audio input to an audio amplifier. The detecting diode will not, however, produce an audio signal from an unmodulated r-f signal. In order that unmodulated signals may be detected, such incoming signals have a locally produced audio signal superimposed on them at the modulating crystal diode and then the"induced or artificially modulated" signal is reflected toward the detecting diode which in the process of demodulation produces an audio signal for the audio amplifier.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1959},
month = {8}
}