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

Abstract

This patent describes a UHF receiver which converts UHF 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 limited 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.

Inventors:
Publication Date:
OSTI Identifier:
6661605
Patent Number(s):
US 4905087; A
Application Number:
PPN: US 7-237191A
Assignee:
Dept. of Energy, Washington, DC (USA)
Resource Type:
Patent
Resource Relation:
Patent File Date: 29 Aug 1988
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; HETERODYNE RECEIVERS; FREQUENCY CONVERTERS; DESIGN; SIGNALS; ELECTRONIC EQUIPMENT; EQUIPMENT; MICROWAVE EQUIPMENT; RADIO EQUIPMENT; 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., 1990. Web.
Lupinetti, F. UHF FM receiver having improved frequency stability and low RFI emission. United States.
Lupinetti, F. Tue . "UHF FM receiver having improved frequency stability and low RFI emission". United States.
@article{osti_6661605,
title = {UHF FM receiver having improved frequency stability and low RFI emission},
author = {Lupinetti, F},
abstractNote = {This patent describes a UHF receiver which converts UHF 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 limited 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {2}
}