UHF FM receiver having improved frequency stability and low RFI emission

Lupinetti, Francesco

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

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Abstract

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:

Lupinetti, Francesco ^[1]

Albuquerque, NM

Issue Date:: 1990-02-27

Research Org.:: AT&T

OSTI Identifier:: 867282

Patent Number(s):: 4905087

Application Number:: 07/237,191

Assignee:: United States of American as represented by United States (Washington, DC)

Patent Classifications (CPCs):: H - ELECTRICITY H04 - ELECTRIC COMMUNICATION TECHNIQUE H04B - TRANSMISSION

H - ELECTRICITY H04 - ELECTRIC COMMUNICATION TECHNIQUE H04N - PICTORIAL COMMUNICATION, e.g. TELEVISION

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H - ELECTRICITY H04 - ELECTRIC COMMUNICATION TECHNIQUE H04B - TRANSMISSION
H04B1/30 - for homodyne or synchrodyne receivers

H - ELECTRICITY H04 - ELECTRIC COMMUNICATION TECHNIQUE H04N - PICTORIAL COMMUNICATION, e.g. TELEVISION
H04N5/455 - Demodulation-circuits

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DOE Contract Number:: AC04-76DP00789

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: uhf; fm; receiver; improved; frequency; stability; rfi; emission; converts; modulated; carrier; signals; baseband; video; heterodyne; conversion; stages; bandpass; filter; fixed; filters; noise; amplifier; amplifies; filtered; signal; applies; amplification; limited; demodulator; circuit; directly; converted; clamped; clamping; driving; monitor; receivers; theoretical; maximum; interference; adjacent; eliminated; due; absence; local; oscillator; video signal; frequency conversion; clamping circuit; carrier signal; bandpass filter; pass filter; local oscillator; video signals; modulated carrier; amplifier amplifies; fixed frequency; filtered signal; noise amplifier; fm receiver; amplification stage; carrier signals; amplification stages; /348/455/

Citation Formats


                    Lupinetti, Francesco. UHF FM receiver having improved frequency stability and low RFI emission.  United States: N. p., 1990. 
        Web.

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                    Lupinetti, Francesco. UHF FM receiver having improved frequency stability and low RFI emission.  United States.

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                    Lupinetti, Francesco. Tue .  
        "UHF FM receiver having improved frequency stability and low RFI emission".  United States.  https://www.osti.gov/servlets/purl/867282.

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@article{osti_867282,

  title        = {UHF FM receiver having improved frequency stability and low RFI emission},

  author       = {Lupinetti, Francesco},

  abstractNote = {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}

}

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