VIDEO SIGNAL OUTPUT CIRCUIT

摘要

PURPOSE:To realize a video signal output circuit in which a cutoff voltage of a cathode ray tube is adjusted without generating a sag due to a vertical frequency component of a video signal with a simple configuration with respect to the video signal output circuit outputting the video signal to the cathode ray tube. CONSTITUTION:A video amplifier 11 comprising a current source A40 and a resistive element R40 and a cathode ray tube 12 are DC-coupled and a DC level shift means 41 is provided to shift a DC voltage level of a video signal S1 by the DC voltage generated across the resistive element R40 in response to a DC current I0 of the current source A40 to easily shift the DC voltage level of the video signal S1 and the sag by the vertical frequency component of the video signal S1 is not produced and a cut-off voltage of the cathode ray tube 12 is easily adjusted.