UHF FM receiver having improved frequency stability and low RFI emission

Patent Application · Mon Aug 29 00:00:00 EDT 1988

OSTI ID:5428454

Lupinetti, F

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.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-76DP00789
• Assignee: Dept. of Energy
• Patent Number(s): PATENTS-US-A7237191
• Application Number: ON: DE91017333; PPN: US 7-237191
• OSTI ID: 5428454
• Country of Publication: United States
• Language: English

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