Accession Number:

ADD002757

Title:

Digital Lock-Loop Frequency Offset Correction and Display Apparatus.

Descriptive Note:

Patent Application,

Corporate Author:

DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s):

• Greci,Anthony

Report Date:

1976-05-17

Pagination or Media Count:

12.0

Abstract:

The patent application describes a digital lock-loop frequency offset correction apparatus for detecting and correcting variations in R.F. input signals in order to hold the R.F. input signals centered in a narrow band receiver system. The digital lock-loop frequency offset correction apparatus eliminates a search routine by comparing the received signal with a locally generated standard. The detected error signal controls a frequency synthesizer which acts as a second local oscillator to keep the R.F. signal centered in the second I.F. stage.

Descriptors:

• *Frequency stabilizers
• Digital systems
• Radiofrequency
• Corrections
• Receivers
• Narrowband
• Doppler effect

Subject Categories:

• Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE