公开(公告)号：US5461398A

公开(公告)日：1995-10-24

申请号：US250250

申请日：1994-05-27

申请人： Y. W. Tang ,  Timothy Chiu ,  Johnson Chiang

发明人： Y. W. Tang ,  Timothy Chiu ,  Johnson Chiang

IPC分类号： G09G1/16 ,  G09G5/40

CPC分类号： G09G1/165 ,  G09G2320/0606 ,  G09G2320/0666 ,  G09G2320/08

摘要： A method and circuit (30) for providing drive signals that have a half-tone and fast blanking capability to a video display (20) has a video preamplifier (31) integrated on a semiconductor substrate (35) for receiving an input video signal (14) and for producing an output drive signal (17) to the video display (20). The preamplifier (31) may have a plurality of channels (31', 31") corresponding to each color video signal to be processed. A halftone control circuit (21), also integrated on the semiconductor substrate (35) receives halftone control signals (60) and connected to reduce the drive signal produced by the video preamplifier (31). A fast blanking circuit (22) for receiving fast blanking control signals (80) is also integrated on the semiconductor substrate (35) and is connected to substantially turn off the drive signal produced by the video preamplifier (31). The preamplifier (31) is constructed with bipolar transistors and the halftone and fast blanking control circuits are constructed with MOS transistors, for example by a LinBiCMOS semiconductor manufacturing process. The preamplifier (31) may include a plurality of amplification stages, (40, 43-45, 48, 50) wherein the halftone control circuit (21) and the fast blanking control circuits (22) control a drive level prior to a last amplification stage (50) to enable low level control of the halftone and fast blanking operations.

摘要翻译： 一种用于向视频显示器（20）提供具有半色调和快速消隐能力的驱动信号的方法和电路（30）具有集成在半导体衬底（35）上用于接收输入视频信号（35）的视频前置放大器（31） 14）并且用于产生到视频显示器（20）的输出驱动信号（17）。 前置放大器（31）可以具有与要处理的每个彩色视频信号对应的多个通道（31'，31“）。 也集成在半导体衬底（35）上的半色调控制电路（21）接收半色调控制信号（60）并被连接以减少由视频前置放大器（31）产生的驱动信号。 用于接收快速消隐控制信号（80）的快速消隐电路（22）也被集成在半导体衬底（35）上并被连接以基本上关闭由视频前置放大器（31）产生的驱动信号。 前置放大器（31）由双极晶体管构成，半色调和快速消隐控制电路由例如通过LinBiCMOS半导体制造工艺的MOS晶体管构成。 前置放大器（31）可以包括多个放大级（40,43-45,48,50），其中半色调控制电路（21）和快速消隐控制电路（22）在最后一次放大之前控制驱动电平 阶段（50），以实现半色调的低电平控制和快速消隐操作。