{"resolved":true,"match_type":"uuid","source_type":"original_book","book_id":"38270854-596f-4a26-8183-db8c968c6020","title":"编码 隐匿在计算机软硬件背后的语言","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787121181184","requested_by":"printed_page","book":{"source_type":"original_book","book_id":"38270854-596f-4a26-8183-db8c968c6020","id":"38270854-596f-4a26-8183-db8c968c6020","uuid":"38270854-596f-4a26-8183-db8c968c6020","title":"编码 隐匿在计算机软硬件背后的语言","normalized_title":"编码隐匿在计算机软硬件背后的语言","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787121181184","isbns":["9787121181184","0123456789","6044921875","3039331000","0000000000","0000000000000"],"parsed":true,"ai_readable":true,"document_type":"book","page_count":438,"navigation_url":"https://workshop.closeclaw.top/ai/book/38270854-596f-4a26-8183-db8c968c6020","title_url":"https://workshop.closeclaw.top/ai/title/%E7%BC%96%E7%A0%81%20%E9%9A%90%E5%8C%BF%E5%9C%A8%E8%AE%A1%E7%AE%97%E6%9C%BA%E8%BD%AF%E7%A1%AC%E4%BB%B6%E8%83%8C%E5%90%8E%E7%9A%84%E8%AF%AD%E8%A8%80","fixed_page_url_template":"https://workshop.closeclaw.top/ai/book/38270854-596f-4a26-8183-db8c968c6020/page/{printed_page}","path_api_url_template":"https://workshop.closeclaw.top/api/ai/book/38270854-596f-4a26-8183-db8c968c6020/page/{printed_page}","read_url":"https://workshop.closeclaw.top/api/ai/read/38270854-596f-4a26-8183-db8c968c6020","page_url":"https://workshop.closeclaw.top/api/ai/books/38270854-596f-4a26-8183-db8c968c6020/page","search_url":"https://workshop.closeclaw.top/api/ai/books/38270854-596f-4a26-8183-db8c968c6020/search"},"page":{"printed_page":181,"pdf_page":197,"physical_index":197,"physical_index_base":0,"printed_page_status":"recognized","page_sha256":"6c800ed884f08ac2958cae7b03880e34502bcea1886175c97d3c7508db8c49c3"},"chapter":"编码隐匿在计算机软硬件背后的语言","content":"所以D输入也变为1，如下表所示。\n\n以上发生的现象可以简单总结为：每当时钟输入由0变为1时，Q端输出就发生变化，或者从0到1，或者由1到 $0 _ { \\circ }$ 下面的时序图可以更加清楚地说明这个问题。\n\n当时钟端Clk输入由0变为1时，D的值（与 $\\overline { { \\mathbf { Q } } }$ 的值相同）被输出到Q端。当下一次Clk信号由0变为1时，D和 $\\overline { { \\mathbf { Q } } }$ 的值同样会改变。\n\n如果这个振荡器的频率是20Hz(即20个周期的时间为1s)，那么Q的输出频率是它的一半，即 10Hz，由于这个原因，这种电路称为分频器（frequency divider)，它的 $\\overline { { \\mathbf { Q } } }$ 输出反馈到触发器的数据端输入 $\\mathbf { D } _ { \\mathrm { c } }$\n\n当然，分频器的输出可以作为另一个分频器的Clk输入，并再一次进行分频。下面是三个分频器连接在一起的示意图。\n\n14 反馈与触发器\n\n181","previous_page":180,"next_page":182}