Horizontal scanning rate correction apparatus

Details Horizontal scanning rate correction apparatus Horizontal scanning rate correction apparatus

H - Electricity

04

N

350/102, 350/103

H04N 3/16 (2006.01) H01J 29/72 (2006.01) H04N 9/24 (2006.01)

Patent

CA 1149056

ABSTRACT OF THE DISCLOSURE A horizontal scanning rate correction apparatus for a television receiver having a cathode-ray tube includes a memory for storing signals representing deviations of the horizontal scanning rate of an electron beam from a desired scanning rate, and a circuit for reading the stored signals from the memory. The apparatus further includes a circuit for sensing a fluctuation value of the high voltage from a high voltage source to produce a correcting signal, and a scanning rate modulating device supplied with the output signal from the reading circuit and the correcting signal from the fluctuation value sensing circuit to correct the scanning rate to be constant in value.

348829

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