Broad operational range, automatic device for the change of frequency in the horizontal deflection of multi-synchronization monitors
US5142204A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1991 |
| Grant date | Aug 25, 1992 |
| Priority date | — |
| Expiry date | Jun 11, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G1/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A broad operational range, automatic device for the change of frequency in the horizontal deflection of multi-synchronization monitors comprises an integrated circuit incorporating, PA0 a frequency meter being input and analog synchronization signal. PA0 a phase comparator having two inputs and in turn receiving said synchronization signal on one input, PA0 a voltage-controlled oscillator adapted to output a signal whose frequency is depending on said voltage and operatively linked to an output of said phase comparator, and PA0 a counter connected with its input, on the one side, to the oscillator output, and on the other side, to the meter output, said counter having an output connected to the other input of the phase comparator also forming the integrated circuit output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.