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):
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:
Subject Categories:
- Electrical and Electronic Equipment