ANALOG VIDEO SIGNAL GENERATION CIRCUIT, ANALOG COMPOSITE VIDEO SIGNAL GENERATION METHOD, ANALOG SIGNAL SYNTHESIS CIRCUIT, ANALOG SIGNAL SYNTHESIS METHOD, SEMICONDUCTOR INTEGRATION CIRCUIT, AND VIDEO DEVICE

摘要

In an analog video signal generation circuit, an inverse output terminal (NDAOUT4) of a first current addition type differential output D/A converter (DAC4) is connected to an inverse output terminal (NDAOUT5) of a second current addition type differential output D/A converter (DAC5). The connection point between them is connected to a current-voltage converter (RL6) and an input terminal of an inverse amplifier (AMP). The output terminal of the inverse amplifier (AMP) is connected to a first video signal output terminal (COMPout). In this configuration, since no adder is used, it is possible to reduce the cost of the video device. Moreover, since the differential output type current addition type D/A converters (DAC4, DAC5) are used, the current consumed in the D/A converter can be used effectively. Thus, it is possible to reduce the parts cost because no adder is used, and to effectively use the current consumed in the current addition type D/A converter, which reduces the power consumption.