{"id":419,"date":"2020-10-04T10:50:14","date_gmt":"2020-10-04T02:50:14","guid":{"rendered":"https:\/\/ezblog.cn\/?p=419"},"modified":"2023-07-25T21:16:40","modified_gmt":"2023-07-25T13:16:40","slug":"pll","status":"publish","type":"post","link":"https:\/\/ezblog.cn\/?p=419","title":{"rendered":"PLL"},"content":{"rendered":"

\u6838\u5fc3\u7ed3\u6784\u662f
\nPD(Phase Detector)+LPF(Low-Pass Filter)+VCO(Voltage Controlled Oscillator)+FD(Feedback Divider)<\/p>\n

1. The phase detector (PD) and charge pump (CP).
\n2. The loop filter, with a transfer function of Z(s)
\n3. The voltage-controlled oscillator (VCO), with a sensitivity of Kv\/s
\n4. The feedback divider, 1\/N<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

\u9274\u9891\u9274\u76f8\u5668
\n\u9274\u9891\u9274\u76f8\u5668\u5c06+IN\u7aef\u7684FREF\u8f93\u5165\u4e0e\u548c-IN\u7aef\u7684\u53cd\u9988\u4fe1\u53f7\u8fdb\u884c\u6bd4\u8f83\u3002\u4f7f\u7528\u4e24\u4e2aD\u578b\u89e6\u53d1\u5668\u548c\u4e00\u4e2a\u5ef6\u8fdf\u5143\u4ef6\u3002\u4e00\u8defQ\u8f93\u51fa\u4f7f\u80fd\u6b63\u7535\u6d41\u6e90\uff0c\u53e6\u4e00\u8defQ\u8f93\u51fa\u4f7f\u80fd\u8d1f\u7535\u6d41\u6e90\u3002\u7ed9\u76ee\u6807\u7535\u8377\u6cf5\u5145\u653e\u7535\u3002<\/p>\n

\"\"
\n\u5982\u679c+IN\u7aef\u7684\u8f93\u5165\u9891\u7387\u9ad8\u4e8e-IN\u7aef\uff1b\u6216\u8005\u8bf4+IN\u4fe1\u53f7\u6b63\u8fb9\u6cbf\uff0c\u6bd4-IN\u4fe1\u53f7\u63d0\u524d\u5230\u8fbe\uff0c\u4f1a\u8f93\u51fa\u9ad8\u3002\u65e2\u6253\u5f00\u8fde\u63a5\u4e8e\u540e\u7ea7\u7684\u7535\u8377\u6cf5\u7535\u5bb9\u5145\u7535\u56de\u8def\uff0c\u5176\u5728PLL\u4f4e\u901a\u6ee4\u6ce2\u5668\u4e2d\u79ef\u5206\u540e\uff0c\u4f1a\u4f7fVCO\u8c03\u8c10\u7535\u538b\u4e0a\u5347\u3002\u5982\u6b64\uff0c-IN\u9891\u7387\u5c06\u968f\u8457VCO\u9891\u7387\u7684\u63d0\u9ad8\u800c\u63d0\u9ad8\uff0c\u5982\u679c-IN\u9891\u7387\u9ad8\u4e8e+IN\u9891\u7387\uff0c\u5219\u53d1\u751f\u76f8\u53cd\u7684\u60c5\u51b5\u3002\u4e24\u4e2aPFD\u8f93\u5165\u6700\u7ec8\u4f1a\u6536\u655b\u6216\u9501\u5b9a\u5230\u76f8\u540c\u9891\u7387\u3002<\/p>\n

\"\"<\/p>\n

\u4e4b\u540e\uff0c\u7531PLL\u7684\u53c2\u8003\u548cPFD\u7535\u8def\u8d21\u732e\u7684\u6240\u6709\u9891\u5185\u6742\u6ce2\u90fd\u88ab\u4f4e\u901a\u6ee4\u6ce2\u5668\u6ee4\u9664\uff0c\u53ea\u5728\u56de\u8def\u8def\u9891\u5e26\u5bbd\u5916\u7559\u4e0b\u4f4e\u5f97\u591a\u7684VCO\u6742\u6ce2\u3002\u5f53\u8f93\u51fa\u9891\u7387\u7b49\u4e8e\u8f93\u5165\u9891\u7387\u65f6\uff0cPLL\u914d\u7f6e\u6700\u7b80\u5355\u3002\u8fd9\u79cdPLL\u79f0\u4e3a\u65f6\u949f\u51c0\u5316PLL\u3002\u5bf9\u4e8e\u6b64\u7c7b\u65f6\u949f\u51c0\u5316\u5e94\u7528\uff0c\u4e00\u822c\u4f7f\u7528\u7a84\u9891\u5bbd(<1kHz)\u4f4e\u901a\u6ee4\u6ce2\u5668\u3002<\/p>\n

\"\"<\/p>\n

\u9ad8\u9891\u6574\u6570N\u5206\u9891\u67b6\u6784
\n\u4e3a\u4e86\u4ea7\u751f\u4e00\u7cfb\u5217\u66f4\u9ad8\u9891\u7387\uff0c\u5e94\u4f7f\u7528VCO\uff0c\u5176\u8c03\u8c10\u8303\u56f4\u6bd4VCO\u66f4\u5bbd\u3002\u8fd9\u5e38\u7528\u4e8e\u8df3\u9891\u6216\u6269\u9891\u8df3\u9891(FHSS)\u5e94\u7528\u4e2d\u3002\u5728\u8fd9\u79cdPLL\u4e2d\uff0c\u8f93\u51fa\u662f\u53c2\u8003\u9891\u7387\u7684\u5f88\u591a\u500d\u3002\u538b\u63a7\u632f\u8361\u5668\u542b\u6709\u53ef\u53d8\u8c03\u8c10\u5143\u4ef6\uff0c\u4f8b\u5982\u53d8\u5bb9\u4e8c\u6781\u7ba1\uff0c\u5176\u7535\u5bb9\u968f\u8f93\u5165\u7535\u538b\u800c\u6539\u53d8\uff0c\u5f62\u6210\u4e00\u4e2a\u53ef\u8c03\u8c10\u632f\u7535\u8def\uff0c\u4ece\u800c\u53ef\u4ee5\u4ea7\u751f\u4e00\u7cfb\u5217\u9891\u7387\u3002PLL\u53ef\u4ee5\u88ab\u8ba4\u4e3a\u662f\u8be5VCO\u7684\u63a7\u5236\u7cfb\u7edf\u3002<\/p>\n

\"\"<\/p>\n

\u53cd\u9988\u5206\u9891\u5668\u7528\u4e8e\u5c06VCO\u9891\u7387\u5206\u9891\u4e3aPD\u9891\u7387\uff0c\u4ece\u800c\u5141\u8bb8PLL\u751f\u6210PD\u9891\u7387\u500d\u6570\u7684\u8f93\u51fa\u9891\u7387\u3002\u5206\u9891\u5668\u4e5f\u53ef\u4ee5\u7528\u5728\u53c2\u8003\u8def\u5f84\u4e2d\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u4f7f\u7528\u6bd4PFD\u9891\u7387\u66f4\u9ad8\u7684\u53c2\u8003\u9891\u7387\u3002<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

The loop filter is a low-pass type, typically with one pole and one zero. The transient response of the loop depends on:
\n1. the magnitude of the pole\/zero,
\n2. the charge pump magnitude,
\n3. the VCO sensitivity,
\n4. the feedback factor, N.<\/p>\n","protected":false},"excerpt":{"rendered":"

\u6838\u5fc3\u7ed3\u6784\u662f PD(Phase Detector)+LPF(Low-Pass Filter)+VCO(Voltage Controlled Oscillator)+FD(Feedback Divider… Read morePLL<\/span><\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[12],"tags":[],"views":1009,"_links":{"self":[{"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/posts\/419"}],"collection":[{"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ezblog.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=419"}],"version-history":[{"count":6,"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/posts\/419\/revisions"}],"predecessor-version":[{"id":445,"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/posts\/419\/revisions\/445"}],"wp:attachment":[{"href":"https:\/\/ezblog.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=419"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ezblog.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=419"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ezblog.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=419"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}