A standard frequency synthesizer using TV line synchronization signal.

Details A standard frequency synthesizer using TV line synchronization signal. A standard frequency synthesizer using TV line synchronization signal.

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999pshao..22...22r&link_type=abstract

Publ. Shaanxi Astron. Obs., Vol. 22, No. 1, p. 22 - 26

Other

Time Synchronization

Scientific paper

A new standard frequency synthesizer is described. The device extracts line synchronization signal (15.625 kHz) from CCTV signal, then synchronizes another 15.625 kHz signal which is obtained from the 10 MHz VCO with temperature compensation. The synchronization is implemented by a phase-locked loop, the phase difference between these two 15.625 kHz signals is converted to voltage signal for adjusting the output frequency of VCO. So, the standard frequency at any frequency bands can be obtained from the output of controlled VCO.

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