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
- Patent Classifications (CPCs):
-
H - ELECTRICITY H03 - BASIC ELECTRONIC CIRCUITRY H03D - DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- 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}
}