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Title: UHF FM receiver having improved frequency stability and low RFI emission

Abstract

This invention pertains to a UHF receiver which converts modulated carrier signals to baseband video signals without any heterodyne or frequency conversion stages. A bandpass filter having a fixed frequency first filters the signals. A low noise amplifier amplifies the filtered signal and applies the signal through further amplification stages to a limiter FM demodulator circuit. The UHF signal is directly converted to a baseband video signal. The baseband video signal is clamped by a clamping circuit before driving a monitor. Frequency stability for the receivers is at a theoretical maximum, and interference to adjacent receivers is eliminated due to the absence of a local oscillator. 5 refs.

Inventors:
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (United States)
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
5428454
Patent Number(s):
PATENTS-US-A7237191
Application Number:
ON: DE91017333; PPN: US 7-237191
Assignee:
Dept. of Energy
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Patent Application
Country of Publication:
United States
Language:
English
Subject:
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION; 42 ENGINEERING; DATA TRANSMISSION SYSTEMS; DESIGN; REMOTE VIEWING EQUIPMENT; COMMUNICATIONS; AMPLIFIERS; ELECTROMAGNETIC FILTERS; GHZ RANGE 01-100; INVENTIONS; MODULATION; SECURITY; TELEMETRY; TELEVISION CAMERAS; CAMERAS; DATA TRANSMISSION; ELECTRONIC EQUIPMENT; EQUIPMENT; FILTERS; FREQUENCY RANGE; GHZ RANGE; 055001* - Nuclear Fuels- Safeguards, Inspection, & Accountability- Technical Aspects; 426000 - Engineering- Components, Electron Devices & Circuits- (1990-)

Citation Formats

Lupinetti, F. UHF FM receiver having improved frequency stability and low RFI emission. United States: N. p., 1988. Web.
Lupinetti, F. UHF FM receiver having improved frequency stability and low RFI emission. United States.
Lupinetti, F. Mon . "UHF FM receiver having improved frequency stability and low RFI emission". United States.
@article{osti_5428454,
title = {UHF FM receiver having improved frequency stability and low RFI emission},
author = {Lupinetti, F},
abstractNote = {This invention pertains to a UHF receiver which converts modulated carrier signals to baseband video signals without any heterodyne or frequency conversion stages. A bandpass filter having a fixed frequency first filters the signals. A low noise amplifier amplifies the filtered signal and applies the signal through further amplification stages to a limiter FM demodulator circuit. The UHF signal is directly converted to a baseband video signal. The baseband video signal is clamped by a clamping circuit before driving a monitor. Frequency stability for the receivers is at a theoretical maximum, and interference to adjacent receivers is eliminated due to the absence of a local oscillator. 5 refs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {8}
}