| 摘要 |
Digital-to-analogue converter especially intended for controlling video image lines. This high-speed, medium-precision converter is constructed so as to provide a sizeable output dynamic which is not overly limited by the threshold voltages of the NMOS technology transistors used in this converter. To obtain this sufficient output dynamic with moreover a sufficient low level, sufficiently constant to drive a bipolar follower stage, there is provision for an output stage of the converter with a capacitor (C) which makes up for the grid/source voltage drop of an output transistor (T1). The capacitor (C) is periodically recharged during line flybacks or frame flybacks of the video signal controlled by the converter. <IMAGE> |
