Patent ID: 6369527
Filing Date: 2002-04-09
Classification: H03K,H04N

Abstract:
An apparatus including a vertical blanking circuit and bias clamp boost supply, for amplifying a vertical blanking signal and generating a boosted DC voltage from said vertical blanking signal, comprising:an amplifier circuit that provides an amplified vertical blanking signal with a peak-to-peak AC voltage magnitude in response to reception of an input vertical blanking signal; a voltage restoration circuit, coupled to said amplifier circuit, that provides said amplified vertical blanking signal combined with a DC restoration voltage in response to reception of said amplified vertical blanking signal and said DC restoration voltage; and a voltage clamp circuit, coupled to said amplifier circuit, that provides a boosted DC voltage which is substantially equal to a sum of a DC clamp voltage and said peak-to-peak AC voltage magnitude in response to reception of said DC clamp voltage and said amplified vertical blanking signal.