| 摘要 |
A synchronizing pulse separator providing output having reduced dependence upon the average signal amplitude level of the composite video signal input comprises a low pass filter coupled to the source of composite video signals. The low pass filter removes high frequency noise components in the composite video signal to reduce false triggering and mistriggering of the sync separator without significantly altering the contour of the sync pulses. A clipping amplifier reduces the sync pulse amplitude range in which the sync separator may trigger in order to reduce sync mistiming errors. A second low pass filter further removes noise from the amplified signal before the signal is applied to the sync pulse output generator.
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