Electromagnetically energized scanning frequency synthesizer
US3937972A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 26, 1974 |
| Grant date | Feb 10, 1976 |
| Priority date | — |
| Expiry date | Dec 26, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J5/0272
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A frequency synthesizer for scanning a number of predetermined frequencies using radiated electromagnetic energy detected at an array of electromagnetic energy transducers for providing a frequency determinative code. The frequency code is obtained by insertion of a programmed data mask between a source of electromagnetic energy and the array of electromagnetic energy transducers. The frequency code is connected to the input of a programmable divider which also receives the output from a voltage controlled oscillator. The programmable divider provides an output frequency which is a quotient of the voltage controlled oscillator output frequency. The quotient output frequency is compared with a reference frequency for producing a control voltage for the voltage controlled oscillator. The voltage controlled oscillator is thereby driven to produce an output frequency determined by the coded input to the programmable divider. A series of adjacent arrays of electromagnetic energy transducers is disposed to be serially exposed to a plurality of serially excited electromagnetic energy sources. Electromagnetic energy is sensed at predetermined ones in each array of electromagnetic energy tr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.