{"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":162,"pdf_page":178,"physical_index":178,"physical_index_base":0,"printed_page_status":"recognized","page_sha256":"11ea38cf5c142a72c63360195be7a12f9ae71f4f8bbb023d134a889fcf47cff7"},"chapter":"编码隐匿在计算机软硬件背后的语言","content":"如此一来，电路又一次连通了。从整个过程来看：开关一旦闭合，金属簧片就会上下跳动电路也会随之连通或断开声音也就会随之发出。如果金属簧片发出了一种刺耳的声音，这套系统就成为了一个蜂鸣器。如果金属簧片前端是一把小锤子，旁边只要放上一个锣，就构成了一个电铃。\n\n有两种方法可以使继电器连接成为一个蜂鸣器，下面再给出一种方法的描述，在示意图中包含了一个标准电压符号和一个接地符号。\n\n看到这幅图你或许立刻想起了第11章介绍过的反向器，因此电路可以简化为如下图所示。\n\n正如你所记得的那样，当反向器的输入是0的时候，它的输出就为1；而当其输入为1时，输出就为0。电路中的开关一旦闭合，反向器中的继电器就会在连通与断开这两种状态之间反复交替。你也可以将电路中的开关省去，这样就可以使反向器连续地工作，如下所示。\n\n这幅图似乎在表达着一种矛盾的逻辑，反向器的输出与其输入是相反的，但是在这里，输出同时又是输入！然而，我们要牢牢记住，反向器在本质上就是一个继电器，而继电器将状态取反以得到另一个状态是需要一点点时间的。所以，即使输入和输出是相同的，输出也会很快地改变，成为输入的相反状态（当然，输出随即也会很快改变输入，\n\n162\n\n编码——隐匿在计算机软硬件背后的语言","previous_page":161,"next_page":163}