多制式彩色电视机
申请公布号:CN2179676Y
申请号:CN93226067.5
申请日期:1993.07.22
申请公布日期:1994.10.12
发明人:谢同安
分类号:H04N5/44
主分类号:H04N5/44
代理人:李晓文;吴宝根
地址:200120上海市浦东大道830号
摘要:本实用新型涉及一种可接收PAL制和NTSC制的电视信号多制式彩色电视机,其特征是:由包含有图象中频、伴音中频、亮度、偏转、场频自动识别电路的48双列直插式集成电路LA7680与CPU控制电压合成选台系统电路M34300N4-012SP;设置有包含NTSC3.58制式转换电路;本实用新型优点是成本低,元器件省,主机集成块,控制集成块各为一块,多制式;多功能,可存储节目数达44个,增加了时钟,定时开机、关机等功能;对画面无干扰,可适用于制成4英寸~21英寸各种尺寸电视接收机。
主权项:1、一种多制式彩色电视机,它包括图象中频,伴音中频,彩色介码、亮度信号处理、行扫描振荡、控制存储及字符发生、电压合成系统集成电路,其特征在于:A、由包含有图象中频,伴音中频、亮度、色度、偏转、场频自动识别电路的48双列直插式(DIP)集成电路LA7680与CPU控制和电压合成选台系统电路M34300N4-012SP连接而成彩色电视机机芯;B、设置有NTSC3.58制式转换电路,电路中置有3.58MHZ的振荡器X901和4.43MH2振荡器X201,其5V电源经二极管VD905稳压和电容C902滤波,两振荡器接有各自的开关二极管VD902与VD901,VD902的正端与VD901的负端连接后分别经电容C903、电阻R903后和端子KN3及反相器V901集极连接,反相器V901输出经电阻R907与隔离二极管VD904正端连接,与二极管VD904、电容C904串联的VD904负端连接3.58MHZ吸收LC901,LC901另一端与端子KN2连接,并通过R202接地,反相器V901的基极经电阻R909与射极跟随器V902之射极及反相器V903相连接,V903集极输出经电阻R908分别接端子KN1及通过电容C271接地,跟随器V902基极经电阻R904与端子KN6连接,通过KN6连接改变色度带通的反相器,其集极经电容并通过上述的集成电路LA7680的40脚与线圈L251的非地端连接,反相器V901集极还通过电阻R914、二极管VD907与KN7和上述的N34300N4-012SP的NCP彩色控制端连接。
Backstop socket structure for lamp string
Nanocomposite compositions for hydrogen storage and methods for supplying hydrogen to fuel cells
Motion detecting device and search region variable-shaped motion detector
Physical quantity sensor with trimming function
Categorizer of content in digital signals
Paintbrush with interchangeable bristle head
Apparatus for measuring two-dimensional displacement
Production of low-temperature fuel cell electrodes
Methods of modulating cell migration using galectin-3
Key management for content protection
Method and system for delivering encrypted content with associated geographical-based advertisements
Method and apparatus for enhancing digital image quality
Nucleic acid molecules from maize and their use for the production of modified starch
Lactoferricin gene and transformant expressing lactoferricin