DIGITAL FREQUENCY SYNTHESIZER
Assignee
Filed
Jan 22, 1982
Granted
Nov 18, 1997
Location
Abstract
There is disclosed a digital frequency synthesizer which converts an ultrnic burst from an echo-ranging sonar system into a continuous signal having a frequency exactly equal to the frequency of the cycles making up the burst. This burst is detected and a number representing the period of this burst generated and transmitted to a first counter. A clock pulse train is generated and transmitted to a second counter. When the numbers in the first and second counters coincide, a single output pulse is generated and the second counter reset. When this cycle is repeated, the frequency of the resultant pulse train reflects any change in frequency of the cycles making up the bursts.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Jan 22, 1982
Rescinded
Feb 27, 1997
Duration
15 years, 1 month
Record Details
- Patent number
- US 5689474
- Application
- 04768226
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
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