LM1291 system equivalent, video pll system.
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Wide continuous autosync range 22 kHz to 125 kHz (1 5 7) with no component switching or external adjustments No manufacturing trims req.
When there is no H sync in sync-tip mode the clamp pulse is generated by the VCO at the frequency preset by pin 5 (fMIN).
The LM1291 is an integrated horizontal time base solution specifically designed to operate in continuous-sync video monitors It automatically synchronizes to any H frequency from 22 kHz to 125 kHz and provides the drive pulse to the high power deflec.
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