{"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":165,"pdf_page":181,"physical_index":181,"physical_index_base":0,"printed_page_status":"recognized","page_sha256":"ecbd1b3aadc976e95531e0ca90deeb07870c96bea35bab08864fafca30917ed8"},"chapter":"编码隐匿在计算机软硬件背后的语言","content":"下面是一个包含两个或非门、两个开关和一个灯泡的电路。\n\n值得注意的是这种特殊的弯曲的连线方式：左边或非门的输出是右边或非门的输入，而右边或非门的输出是左边或非门的输入。这种连接方式我们称之为反馈（feedback)。系统的输出返回给输入这种形式和我们在振荡器中讨论的情况很相似。接下来你将会看到，本章大部分电路都具备这种特质。\n\n在初始状态下，电路中只有左边的或非门输出电流，这是因为其两个输入均为 $0 _ { \\circ }$ 让我们闭合上面的开关，左边或非门将立刻输出0，右边或非门的输出也会随之变为1，这时灯泡将被点亮。\n\n奇妙的是，这时一旦你关闭上边的开关，灯炮依然闪闪发光。这是因为由于左边或非门的输入中有一个为1，其输出依然是0，因而左边或非门的输出不变，所以灯泡仍然亮着。\n\n14 反馈与触发器\n\n165","previous_page":164,"next_page":166}