发明授权
US4005368A Memory tuning system with automatic two speed display 失效
内存调谐系统具有自动双速显示

  • 专利标题: Memory tuning system with automatic two speed display
  • 专利标题(中): 内存调谐系统具有自动双速显示
  • 申请号: US646720
    申请日: 1976-01-05
  • 公开(公告)号: US4005368A
    公开(公告)日: 1977-01-25
  • 发明人: Akio Tanaka
  • 申请人: Akio Tanaka
  • 申请人地址: IL Chicago
  • 专利权人: Zenith Radio Corporation
  • 当前专利权人: Zenith Radio Corporation
  • 当前专利权人地址: IL Chicago
  • 主分类号: H03J5/02
  • IPC分类号: H03J5/02 H04B1/16
Memory tuning system with automatic two speed display
摘要:
An all-channel two mode television tuning system includes a counter for sequentially generating channel numbers to adjust tuning. An 82 .times. 1 bit read/write memory is addressed in a program mode by the generated channel numbers to provide locations for storage of signals for tuning to preselected channels. In the operate mode channel numbers are again generated to access the memory locations and logic circuitry determines if generated channel numbers correspond to preselected channel numbers. Channel skip control circuitry is activated in the operate mode to cause very rapid counting faster than viewer perception whenever non-selected channel numbers are determined and a much slower speed or pause condition when correspondence with a preselected channel number is determined.
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