{"id":5428,"date":"2024-09-15T13:01:01","date_gmt":"2024-09-15T05:01:01","guid":{"rendered":""},"modified":"2024-09-15T13:01:01","modified_gmt":"2024-09-15T05:01:01","slug":"\u7535\u6d41\u6e90\u5e76\u8054\u53ef\u4ee5\u76f8\u52a0\u5417_\u5e76\u8054\u7535\u8def\u7535\u6d41\u516c\u5f0f","status":"publish","type":"post","link":"https:\/\/mushiming.com\/5428.html","title":{"rendered":"\u7535\u6d41\u6e90\u5e76\u8054\u53ef\u4ee5\u76f8\u52a0\u5417_\u5e76\u8054\u7535\u8def\u7535\u6d41\u516c\u5f0f"},"content":{"rendered":"
\n
\n \"\u7535\u6d41\u6e90\u5e76\u8054\u53ef\u4ee5\u76f8\u52a0\u5417_\u5e76\u8054\u7535\u8def\u7535\u6d41\u516c\u5f0f\n <\/div>\n

\u4f4e\u7535\u5e73\u7535\u6d41\u6d4b\u91cf<\/b><\/h3>\n

\u4e00\u822c\u60c5\u51b5\u4e0b\uff0c\u76f4\u6d41\u7535\u6d41\u53ef\u901a\u8fc7\u5728\u4e00\u4e2a\u5df2\u77e5\u7535\u963b\u4e0a\u901a\u4ee5\u76ee\u6807\u7535\u6d41\uff0c\u6d4b\u91cf\u5176\u76f4\u6d41\u538b\u964d\u7684\u65b9\u6cd5\u8fdb\u884c\u8ba1\u7b97\u3002\u79ef\u5206\u7535\u8def\u4f7f\u7528\u53cd\u9988\u7535\u5bb9\u5668\u4e5f\u80fd\u8fdb\u884c\u4f4e\u7535\u5e73\u7535\u6d41\u6d4b\u91cf\uff08\u56fe 1\uff09\uff0c\u56e0\u4e3a\u7535\u5bb9\u5668\u4e2d\u7684\u7535\u8377\u7d2f\u79ef\u5230\u4e00\u5b9a\u7a0b\u5ea6\u4fbf\u80fd\u5efa\u7acb\u8d77\u7535\u538b\uff0c\u4e5f\u540c\u6837\u9002\u7528\u4e8e\u538b\u964d\u6cd5\u3002\u6700\u540e\u5c06\u8ba1\u7b97\u7ed3\u679c\u8f6c\u6362\u4e3a\u7535\u6d41\u89c4\u683c\u3002<\/p>\n

\u8fd9\u79cd\u4f7f\u7528\u5b9a\u503c\u7535\u963b\u8ba1\u7b97\u7535\u6d41\u503c\u7684\u65b9\u6cd5\u4e00\u822c\u91c7\u7528\u4e24\u79cd\u914d\u7f6e\uff1a\u5e76\u8054\u578b\u548c\u53cd\u9988\u578b\u653e\u5927\u5668\u3002\u5e76\u8054\u578b\u5e7f\u6cdb\u5e94\u7528\u4e8e\u6570\u5b57\u4e07\u7528\u8868\uff08DMM\uff09\uff0c\u53cd\u9988\u578b\u4e3b\u8981\u7528\u4e8e\u4f4e\u7535\u5e73\u6d4b\u91cf\u4eea\u5668\uff08\u4f8b\u5982\u76ae\u5b89\u8ba1\u6216\u9759\u7535\u8ba1\uff09\uff0c\u56e0\u4e3a\u540e\u8005\u80fd\u591f\u5b9e\u73b0\u66f4\u5bbd\u7684\u6d4b\u91cf\u8303\u56f4\u3001\u66f4\u4f4e\u7684\u8d1f\u8377\u7535\u538b\u548c\u66f4\u5c0f\u7684\u7b49\u6548\u8f93\u5165\u7535\u963b\u3002Keysight B2980A \u7cfb\u5217\u6beb\u5fae\u5fae\u5b89\u8ba1<\/b> \u7cfb\u5217\u91c7\u7528\u4e86\u53cd\u9988\u578b\u914d\u7f6e\uff0c\u6839\u636e\u6d4b\u91cf\u7684\u8303\u56f4\u5bf9\u591a\u4e2a\u53cd\u9988\u7535\u963b\uff08\u56fe 2 \u4e2d\u7684 Rs\uff09\u8fdb\u884c\u5207\u6362\u3002<\/p>\n<\/p>\n

\n \"\u7535\u6d41\u6e90\u5e76\u8054\u53ef\u4ee5\u76f8\u52a0\u5417_\u5e76\u8054\u7535\u8def\u7535\u6d41\u516c\u5f0f\n <\/div>\n<\/p>\n
\n \"\u7535\u6d41\u6e90\u5e76\u8054\u53ef\u4ee5\u76f8\u52a0\u5417_\u5e76\u8054\u7535\u8def\u7535\u6d41\u516c\u5f0f\n <\/div>\n

\u9ad8\u963b\u6d4b\u91cf<\/b><\/h3>\n

\u56fe 3 \u548c 4 \u663e\u793a\u4e86\u5982\u4f55\u7cbe\u786e\u3001\u7a33\u5b9a\u5730\u6d4b\u91cf\u9ad8\u7535\u963b\uff0c\u6bd4\u5982\u8bf4\u4ecb\u7535\u6750\u6599\u7684\u7edd\u7f18\u7535\u963b\u3002\u56fe 3 \u6240\u793a\u7684\u6d4b\u91cf\u914d\u7f6e\u4e3b\u8981\u7528\u4e8e\u6d4b\u91cf\u9ad8\u7535\u963b\uff0c\u5305\u62ec\u4e00\u4e2a\u5df2\u63a5\u5730\u7684\u5b89\u57f9\u8ba1\u548c\u65bd\u52a0\u4e8e\u88ab\u6d4b\u5668\u4ef6\uff08DUT\uff09\u4e0a\u7684\u7535\u538b\u6e90\uff08Vs\uff09\u3002\u7535\u963b\u503c\u7531\u4e0b\u9762\u7684\u516c\u5f0f\u7b97\u51fa\uff1aRl= Vs\/Im<\/b>
\u5f53\u88ab\u6d4b\u5668\u4ef6\u7684\u4e00\u7aef\u63a5\u5730\u65f6\uff0c\u5e94\u4f7f\u7528\u56fe 4 \u6240\u793a\u7684\u6d4b\u91cf\u914d\u7f6e\u3002\u901a\u8fc7\u628a\u5b89\u57f9\u8ba1\u7684 Lo \u7aef\u5b50\u8fde\u63a5\u81f3 Vs\uff0c\u6e90\u7535\u538b\u53ef\u4ee5\u6d41\u7ecf\u5b89\u57f9\u8ba1\u5e76\u65bd\u52a0\u5230\u88ab\u6d4b\u5668\u4ef6\u3002\u7535\u963b\u503c\u7531\u4e0b\u9762\u7684\u516c\u5f0f\u7b97\u51fa\uff1aRl= - Vs\/Im<\/b><\/p>\n<\/p>\n

\n \"\u7535\u6d41\u6e90\u5e76\u8054\u53ef\u4ee5\u76f8\u52a0\u5417_\u5e76\u8054\u7535\u8def\u7535\u6d41\u516c\u5f0f\n <\/div>\n<\/p>\n
\n \"\u7535\u6d41\u6e90\u5e76\u8054\u53ef\u4ee5\u76f8\u52a0\u5417_\u5e76\u8054\u7535\u8def\u7535\u6d41\u516c\u5f0f\n <\/div>\n

\u9ad8\u7075\u654f\u6d4b\u91cf\u4e2d\u7684\u566a\u58f0<\/b><\/h3>\n

\u4eea\u5668\u7684\u5185\u90e8\u7535\u8def\u5bf9\u5173\u952e\u566a\u58f0\u6027\u80fd\u8d77\u7740\u51b3\u5b9a\u6027\u4f5c\u7528\uff0c\u56e0\u800c\u6709\u5fc5\u8981\u6df1\u5165\u7406\u89e3\u7535\u8def\u7684\u5de5\u4f5c\u539f\u7406\u3002\u56fe 5 \u663e\u793a\u4e86\u7b49\u6548\u5b89\u57f9\u8ba1\u7535\u8def\u4e0e\u7535\u538b\u6e90\uff0c\u5176\u4e2d\u5305\u62ec\u88ab\u6d4b\u5668\u4ef6\u3001ADC\uff08\u6a21\u6570\u8f6c\u6362\u5668\uff09\u4ee5\u53ca\u4e0e\u6d4b\u91cf\u6709\u5173\u7684\u4e3b\u8981\u566a\u58f0\u6e90\u3002<\/p>\n<\/p>\n

\n \"\u7535\u6d41\u6e90\u5e76\u8054\u53ef\u4ee5\u76f8\u52a0\u5417_\u5e76\u8054\u7535\u8def\u7535\u6d41\u516c\u5f0f\n <\/div>\n

\u9996\u5148\uff0c\u7b80\u8981\u4ecb\u7ecd\u4e0b\u9762\u8fd9\u51e0\u79cd\u7535\u5bb9\uff0c\u4fbf\u4e8e\u60a8\u66f4\u597d\u5730\u7406\u89e3\u5185\u90e8\u566a\u58f0\u5982\u4f55\u8f6c\u6362\u6210\u6d4b\u91cf\u7ed3\u679c\u3002
Cs\uff1a\u4e0e Rs \u5e76\u8054\u7684\u7535\u5bb9\u3002Cs \u548c Rs \u6240\u8bbe\u5b9a\u7684\u65f6\u95f4\u5e38\u6570\u51b3\u5b9a\u4e86\u5b89\u57f9\u8ba1\u7684\u5e26\u5bbd\u4e0e\u5efa\u7acb\u65f6\u95f4\u3002
Cg\uff1a\u5728\u5b89\u57f9\u8ba1\u7684 Hi \u7aef\u5b50\u548c Lo \u7aef\u5b50\u4e4b\u95f4\u7684\u7535\u5bb9\u3002Cg \u7684\u4e3b\u8981\u6210\u5206\u662f\u5bfc\u4f53\u548c\u7535\u7f06\u5c4f\u853d\uff08\u7535\u7f06\u7528\u4e8e\u8fde\u63a5\u5b89\u57f9\u8ba1\u548c\u88ab\u6d4b\u5668\u4ef6\uff09\u4e4b\u95f4\u7684\u7535\u5bb9\u3002
Ci\uff1a\u5728\u6d4b\u91cf\u7aef\u5b50\uff08Hi\uff09\u548c\u7535\u538b\u6e90\u4e4b\u95f4\u7684\u7535\u5bb9\u3002<\/p>\n

\u8ba9\u6211\u4eec\u770b\u4e00\u4e0b\u56fe 5 \u4e2d\u7684\u4e09\u79cd\u566a\u58f0\u6e90\u5bf9\u4eea\u5668\u7684\u6d4b\u91cf\u6027\u80fd\u6709\u4f55\u5f71\u54cd\u3002
Vn1\uff1aRs \u7684\u70ed\u566a\u58f0
\u7535\u963b\u5728\u5355\u4f4d\u9891\u7387\u4e0a\u4ea7\u751f\u7684\u70ed\u566a\u58f0\u53ef\u7531\u4e0b\u9762\u7684\u516c\u5f0f\u7b97\u51fa\u3002Vn1= \u221a4kTRs<\/b><\/p>\n

k:\u73bb\u5c14\u5179\u66fc\u5e38\u6570
T\uff1a\u6e29\u5ea6[K]<\/p>\n

Vn1 \u4ea7\u751f\u7684\u7535\u6d41\u566a\u58f0\u53ef\u88ab\u4f30\u7b97\u4e3a<\/p>\n

In1=Vn1\/Rs= \u221a(4kT\/Rs)<\/b><\/p>\n

\u6839\u636e\u7ed3\u679c\u53ef\u77e5\uff0c\u51cf\u5c11\u5b89\u57f9\u8ba1\u4e2d\u7684\u7535\u6d41\u566a\u58f0\u8981\u6c42\u963b\u503c\u66f4\u9ad8\u7684 Rs\u3002<\/p>\n

\u7531\u4e8e\u8fd9\u79cd\u70ed\u566a\u58f0\u88ab\u5f52\u7c7b\u4e3a\u767d\u566a\u58f0\uff0c\u5219\u8f93\u51fa\u7535\u538b\u566a\u58f0\u9891\u8c31\uff08\u7535\u538b\u4e3a Vo \u65f6\uff09\u5c06\u53d7\u9650\u4e8e\u5b89\u57f9\u8ba1\u7684\u5e26\u5bbd\u2014\u2014\u4e5f\u5c31\u662f\u7531 Rs \u548c Cs \u51b3\u5b9a\u7684\u5e26\u5bbd\u3002\u8868 1 \u663e\u793a\u4e86 B2980A \u7cfb\u5217\u6beb\u5fae\u5fae\u5b89\u8ba1<\/b>\u7cfb\u5217\u4e2d\u81f3\u5c11\u4e24\u7ec4\u91cf\u7a0b\u5185\u7684 Rs \u548c Cs \u503c\u3002Tau \u662f Rs \u548c Cs \u6240\u8bbe\u5b9a\u7684\u65f6\u95f4\u5e38\u6570\u3002<\/p>\n<\/p>\n

\n \"\u7535\u6d41\u6e90\u5e76\u8054\u53ef\u4ee5\u76f8\u52a0\u5417_\u5e76\u8054\u7535\u8def\u7535\u6d41\u516c\u5f0f\n <\/div>\n

Vn2:\u653e\u5927\u5668\u7684\u7b49\u6548\u8f93\u5165\u7535\u538b\u566a\u58f0
\u901a\u8fc7 Cg\u3001Ci \u548c Ri\uff08\u88ab\u6d4b\u5668\u4ef6\uff09\uff0c\u53ef\u5c06\u566a\u58f0\u7535\u538b\u8f6c\u6362\u6210\u7535\u6d41\u566a\u58f0\u3002
Vn3:\u7535\u538b\u6e90\u566a\u58f0
\u901a\u8fc7 Ci \u548c Ri\uff08\u88ab\u6d4b\u5668\u4ef6\uff09\uff0c\u53ef\u5c06\u566a\u58f0\u7535\u538b\u8f6c\u6362\u6210\u7535\u6d41\u566a\u58f0\u3002<\/p>\n

\u7535\u5bb9\u7684\u5f71\u54cd<\/b><\/h3>\n

\u4e00\u822c\u60c5\u51b5\u4e0b\uff0cVn2 \u548c Vn3 \u90fd\u4f5c\u4e3a\u7535\u6d41\u566a\u58f0\u7684\u4e3b\u8981\u6210\u5206\uff0c\u800c Vn1 \u53ea\u80fd\u786e\u5b9a\u5b89\u57f9\u8ba1\u7684\u6700\u4f4e\u672c\u5e95\u566a\u58f0\u3002\u56e0\u6b64\uff0cCg \u548c Ci \u7684\u52a0\u5927\u52bf\u5fc5\u4f1a\u4f7f\u6d4b\u91cf\u7ed3\u679c\u4e2d\u7684\u7535\u6d41\u566a\u58f0\u52a0\u5927\u3002\u5728\u88ab\u6d4b\u5668\u4ef6\u7684\u7535\u963b\u6781\u5927\u65f6\uff0cCg \u4e0e Ci \u7684\u963b\u6297\u53ef\u80fd\u4f1a\u5c0f\u4e8e Ri \u7684\u963b\u6297\uff0c\u5373\u4f7f\u5728\u76f8\u5bf9\u8f83\u4f4e\u7684\u9891\u7387\u8303\u56f4\u5185\u4e5f\u662f\u5982\u6b64\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6d41\u7ecf\u5bc4\u751f\u7535\u5bb9\u7684\u566a\u58f0\u7535\u6d41\u5c06\u4f1a\u8d85\u8fc7\u6d41\u7ecf\u88ab\u6d4b\u5668\u4ef6\u7684\u566a\u58f0\u7535\u6d41\uff0c\u6d4b\u91cf\u7ed3\u679c\u4e5f\u5c06\u53d7\u5230\u5927\u91cf\u566a\u58f0\u7684\u5e72\u6270\u3002
\u5982\u524d\u6240\u8ff0\uff0cCg \u662f\u7535\u7f06\u7684\u5c4f\u853d\u7535\u5bb9\uff0cCi \u662f\u88ab\u6d4b\u5668\u4ef6\u7684\u7535\u5bb9\u53ca\u5176\u7aef\u63a5\u7535\u5bb9\u4e4b\u548c\u3002\u8003\u8651\u5230\u964d\u4f4e\u88ab\u6d4b\u5668\u4ef6\u672c\u8eab\u7684\u7535\u5bb9\u5e76\u4e0d\u5bb9\u6613\uff0c\u4e3a\u4e86\u83b7\u5f97\u7a33\u5b9a\u3001\u53ef\u53d8\u6027\u5f88\u4f4e\u7684\u6d4b\u91cf\u7ed3\u679c\uff0c\u6211\u4eec\u9700\u8981\u6700\u5927\u9650\u5ea6\u5730\u51cf\u5c11 Cg \u53ca\u88ab\u6d4b\u5668\u4ef6\u7684\u7aef\u63a5\u7535\u5bb9\u3002<\/p>\n

\u9694\u79bb<\/b><\/h3>\n

\u5982\u56fe 6\uff08A\uff09\u6240\u793a\uff0c\u7edd\u7f18\u4f53\uff08\u4f8b\u5982\u7535\u7f06\u62a4\u5957\uff09\u5b9e\u9645\u4e0a\u59cb\u7ec8\u4f4d\u4e8e\u5b89\u57f9\u8ba1\u7684 Hi \u7aef\u5b50\u548c\u7535\u52bf\u4e4b\u95f4\u3002\u5f53\u7edd\u7f18\u4f53\u53d7\u5230\u7535\u538b\u6e90\u504f\u7f6e\u65f6\uff0c\u4f1a\u6709\u4e00\u5b9a\u7684\u6cc4\u9732\u7535\u6d41\u901a\u8fc7\u7edd\u7f18\u4f53\uff0c\u4ece\u800c\u4ea7\u751f\u6d4b\u91cf\u8bef\u5dee\u3002\u5728\u56fe 6\uff08A\uff09\u4e2d\uff0c\u6700\u5927\u6cc4\u9732\u7535\u6d41\u4e3aIleak= Vs\/Rleak<\/b><\/p>\n

\u4f7f\u7528\u7535\u963b\u7387\u8f83\u5927\u7684\u6750\u6599\u6216\u8f83\u77ed\u7684\u7535\u7f06\u6765\u52a0\u5927\u7b49\u6548\u7535\u963b\uff0c\u53ef\u4ee5\u9002\u5f53\u5730\u51cf\u5c11\u6d4b\u91cf\u8bef\u5dee\u3002\u4f46\u7531\u4e8e\u6750\u6599\u7684\u53ef\u52a0\u5de5\u6027\u6216\u6d4b\u91cf\u7684\u53ef\u7528\u6027\u4e0d\u591f\u7406\u60f3\uff0c\u56e0\u800c\u8fd9\u79cd\u8865\u6551\u63aa\u65bd\u6709\u65f6\u5019\u5e76\u4e0d\u53ef\u884c\u3002\u6b64\u5916\uff0c\u6cc4\u9732\u7535\u6d41\u7535\u5e73\u4f1a\u968f\u7740\u5916\u52a0\u7535\u538b\u800c\u53d8\u5316\uff0c\u4f7f\u6d4b\u91cf\u53d8\u5f97\u66f4\u52a0\u590d\u6742\u548c\u4e0d\u7a33\u5b9a\u3002<\/p>\n<\/p>\n

\n \"\u7535\u6d41\u6e90\u5e76\u8054\u53ef\u4ee5\u76f8\u52a0\u5417_\u5e76\u8054\u7535\u8def\u7535\u6d41\u516c\u5f0f\n <\/div>\n

\u51cf\u5c11\u6cc4\u9732\u7535\u6d41\u7684\u6700\u6709\u6548\u65b9\u5f0f\u662f\u5e94\u7528\u9694\u79bb\u6280\u672f\u3002\u9694\u79bb\u5728\u672c\u6587\u4e2d\u88ab\u5b9a\u4e49\u4e3a\uff0c\u901a\u8fc7\u504f\u7f6e\u5bfc\u7535\u6750\u6599\u4e8e\u5b89\u57f9\u8ba1 Hi \u7aef\u5b50\u4e0a\u7684\u7535\u538b\uff0c\u53ef\u5c06 Hi \u7aef\u5b50\u76f8\u8fde\u63a5\u7684\u7535\u6c14\u8282\u70b9\u7ed9\u4e88\u9694\u79bb\u3002\u5982\u56fe 6\uff08B\uff09\u6240\u793a\uff0c\u7531\u4e8e Lo \u7aef\u5b50\u7535\u538b\u4e0e Hi \u7aef\u5b50\u7535\u538b\u57fa\u672c\u76f8\u540c\uff0c\u90a3\u4e48\u5bf9 Lo \u7aef\u5b50\u8fdb\u884c\u9694\u79bb\u5373\u53ef\u6700\u5c0f\u5316\u6216\u6d88\u9664 Hi \u548c Lo \u4e4b\u95f4\u7684\u9732\u6cc4\u3002\u5728\u4e0b\u9762\u7684\u516c\u5f0f\u4e2d\uff0cVd \u7684\u503c\u5f88\u5c0f\u6216\u51e0\u8fd1\u4e3a\u96f6\uff0c\u4e14\u4e0e\u7535\u538b\u65e0\u5173\u3002<\/p>\n

Ilk1= Vd\/Rlk1<\/b><\/p>\n

\u5c3d\u7ba1 Lo \u7aef\u5b50\u5230\u5730\u9762\u7684\u6cc4\u9732\u7535\u6d41\u4ecd\u7136\u5b58\u5728\uff0c\u4f46\u5b83\u53ea\u5728\u7535\u538b\u6e90\u548c\u5730\u9762\u4e4b\u95f4\u6d41\u52a8\uff0c\u56e0\u800c\u4e0d\u4f1a\u5bf9\u5b89\u57f9\u8ba1\u7684\u7535\u6d41\u6d4b\u91cf\u9020\u6210\u5f71\u54cd\u3002<\/p>\n

Ilk2= Vs\/Rlk2<\/b><\/p>\n

\u4f8b\u5982\uff0cVd \u8fdc\u8fdc\u5c0f\u4e8e 100 \u03bcV\uff08B2980A \u7cfb\u5217\u6beb\u5fae\u5fae\u5b89\u8ba1<\/b> \u7cfb\u5217\u7684\u6280\u672f\u6307\u6807\u89c4\u5b9a\u4e3a 20 \u03bcV\uff09\u3002\u5f53 Vs = 100 V \u4e14 Rleak = Rlk1 \u65f6\uff0c\u6cc4\u9732\u7535\u6d41\uff08Ilk1\uff09\u4e3a Ileak \u7684 1\/106\u3002<\/p>\n

\u4f7f\u7528\u4e09\u8f74\u7535\u7f06\u6709\u52a9\u4e8e\u60a8\u5feb\u901f\u8fdb\u884c\u9694\u79bb\u8bbe\u7f6e\u3002\u5982\u56fe 7 \u6240\u793a\uff0c\u4e00\u6839\u5e26\u6709\u5185\u5c4f\u853d\u7684\u4e09\u8f74\u7535\u7f06\u5df2\u8fde\u63a5\u81f3 Lo \u7aef\u5b50\uff0cHi \u7aef\u5b50\u548c Lo \u7aef\u5b50\u4e0a\u7684\u7535\u538b\u5b8c\u5168\u76f8\u540c\uff0c\u8be5\u7535\u7f06\u53ef\u4ee5\u5c01\u95ed Hi \u7aef\u5b50\u76f8\u8fde\u63a5\u7684\u4e2d\u5fc3\u5bfc\u4f53\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5047\u5982\u4ece\u4e2d\u5fc3\u5bfc\u4f53\u6d41\u51fa\u7684\u7535\u6d41\u6ca1\u6709\u901a\u8fc7\u4e0e Lo \u7aef\u5b50\u7535\u52bf\u8fde\u63a5\u7684\u5bfc\u4f53\uff08Lo \u7aef\u5b50\u548c Hi \u7aef\u5b50\u7684\u7535\u52bf\u57fa\u672c\u76f8\u540c\uff09\uff0c\u90a3\u4e48\u8fd9\u4e2a\u7535\u6d41\u5c31\u4e0d\u80fd\u6d41\u5165\u5176\u4ed6\u5bfc\u4f53\u3002\u53e6\u5916\uff0cHi \u7aef\u5b50\u4e0e\u5176\u4ed6\u7535\u52bf\u4e4b\u95f4\u7684\u7535\u5bb9\u7565\u5927\u4e8e Lo \u7aef\u5b50\u4e0e\u7535\u52bf\u3002\u7531\u6b64\u53ef\u77e5\uff0c\u4f7f\u7528\u4e09\u8f74\u7535\u7f06\u53ef\u4ee5\u8f7b\u677e\u5b9e\u73b0\u6307\u5b9a\u7684\u9694\u79bb\u3002\u56e0\u6b64\uff0c\u5f53\u5b89\u57f9\u8ba1\u7684\u8f93\u5165\u7aef\u662f\u4e00\u4e2a\u5177\u5907 Hi\/Lo\/Guard \u529f\u80fd\u7684\u4e09\u8f74\u8fde\u63a5\u5668\uff08\u7c7b\u4f3c\u4e8e Keysight B2980A \u7cfb\u5217\u6beb\u5fae\u5fae\u5b89\u8ba1<\/b> \u7cfb\u5217\uff09\u65f6\uff0c\u53ea\u9700\u8fde\u63a5\u4e00\u6839\u4e09\u8f74\u7535\u7f06\u5373\u53ef\u5feb\u901f\u6267\u884c\u66f4\u52a0\u7a33\u5b9a\u3001\u66f4\u5c11\u6f0f\u6cc4\u7684\u6d4b\u91cf\u3002<\/p>\n

Keysight B2980A \u7cfb\u5217\u6beb\u5fae\u5fae\u5b89\u8ba1<\/b> \u7cfb\u5217\u914d\u5907 1.5 \u7c73\u957f\u7684\u4f4e\u566a\u58f0\u8010\u9707\u4e09\u8f74\u7535\u7f06\uff0c\u53ef\u4ee5\u5b9e\u73b0\u5353\u8d8a\u7684\u4f4e\u7535\u5e73\u7535\u6d41\u6d4b\u91cf\u6027\u80fd\u3002<\/p>\n<\/p>\n

\n \"\u7535\u6d41\u6e90\u5e76\u8054\u53ef\u4ee5\u76f8\u52a0\u5417_\u5e76\u8054\u7535\u8def\u7535\u6d41\u516c\u5f0f\n <\/div>\n

\u83b7\u5f97\u66f4\u53ef\u9760\u6d4b\u91cf\u7ed3\u679c\u5e94\u5f53\u8003\u8651\u7684\u56e0\u7d20<\/b><\/h3>\n

\u5982\u524d\u6240\u8ff0\uff0c\u9664\u6b63\u786e\u8fde\u63a5\u7684\u5b89\u57f9\u8ba1\u4e4b\u5916\uff0c\u7535\u538b\u6e90\u7684\u9009\u62e9\u548c\u88ab\u6d4b\u5668\u4ef6\u8fde\u63a5\u540c\u6837\u4e5f\u662f\u4fdd\u8bc1\u9ad8\u7075\u654f\u5ea6\u6d4b\u91cf\u7684\u7a33\u5b9a\u6027\u4e0e\u53ef\u91cd\u590d\u6027\u7684\u91cd\u8981\u56e0\u7d20\u3002<\/p>\n

\u7531\u4e8e\u5bc4\u751f\u7535\u5bb9\u4e0e\u88ab\u6d4b\u5668\u4ef6\u53ca\u5176\u7535\u5bb9\u5e76\u8054\uff0c\u7535\u538b\u6e90\u4ea7\u751f\u7684\u566a\u58f0\u88ab\u89c6\u4e3a\u6d4b\u91cf\u4e0d\u7a33\u5b9a\u7684\u6839\u6e90\uff0c\u60a8\u5e94\u5f53\u4f7f\u7528\u566a\u58f0\u8f83\u5c11\u7684\u7535\u538b\u6e90\uff0c\u800c\u4e14\u5c3d\u53ef\u80fd\u5730\u6d88\u9664\u8fd9\u79cd\u5e76\u8054\u7535\u5bb9\u3002\u6ce8\u610f\uff1a\u5f53\u5bc4\u751f\u7535\u5bb9\u7684\u963b\u6297\u4e0e\u88ab\u6d4b\u5668\u4ef6\u7535\u963b\u76f8\u5dee\u65e0\u51e0\u65f6\uff0c\u7535\u538b\u6e90\u4e2d\u7684\u4f4e\u9891\u566a\u58f0\u4e5f\u6709\u53ef\u80fd\u5f71\u54cd\u5230\u6d4b\u91cf\u7ed3\u679c\u7684\u51c6\u786e\u6027\u3002\u5728\u5bf9\u4ecb\u7535\u6750\u6599\u8fdb\u884c\u7edd\u7f18\u7535\u963b\u6d4b\u91cf\u65f6\uff0c\u88ab\u6d4b\u5668\u4ef6\u4f1a\u65f6\u5e38\u8868\u73b0\u51fa\u7535\u5bb9\u7279\u5f81\uff0c\u5e76\u4e14\u5176\u7535\u5bb9\u503c\u4e5f\u8f83\u5927\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6d4b\u91cf\u7ed3\u679c\u975e\u5e38\u4e0d\u7a33\u5b9a\uff0c\u88ab\u6d4b\u5668\u4ef6\u4e2d\u7684\u7535\u5bb9\u4e5f\u5f88\u96be\u964d\u4f4e\u3002\u6700\u597d\u662f\u5728\u7535\u538b\u6e90\u7684\u8f93\u51fa\u7aef\u63d2\u5165\u4e00\u4e2a\u4f4e\u901a\u6ee4\u6ce2\u5668\uff0c\u4ee5\u589e\u5f3a\u6d4b\u91cf\u7ed3\u679c\u7684\u7a33\u5b9a\u6027\u3002\u5982\u56fe 8 \u6240\u793a\uff0c\u901a\u8fc7\u7ed9\u88ab\u6d4b\u5668\u4ef6\u4e32\u8054\u4e00\u4e2a\u9002\u5f53\u7684\u7535\u963b\uff08Rf\uff09\uff0c\u5728\u622a\u6b62\u9891\u7387\uff08fT\uff0c\u7531 Rf \u548c Ci \u786e\u5b9a\uff09\u4ee5\u4e0a\u7684\u9891\u6bb5\uff0c\u566a\u58f0\u5c06\u4f1a\u6709\u6240\u964d\u4f4e\u3002\u6ce8\u610f\uff1aRf \u5fc5\u987b\u8fdc\u5c0f\u4e8e Ri\uff0c\u7531\u6b64 Rf \u4e0a\u7684\u538b\u964d\u53ef\u5ffd\u7565\u4e0d\u8ba1\u3002<\/p>\n

fT= 1\/(2\u03c0RfCi)<\/b><\/p>\n<\/p>\n

\n \"\u7535\u6d41\u6e90\u5e76\u8054\u53ef\u4ee5\u76f8\u52a0\u5417_\u5e76\u8054\u7535\u8def\u7535\u6d41\u516c\u5f0f\n <\/div>\n

\u5728\u5b89\u57f9\u8ba1 Hi \u548c Lo \u7aef\u5b50\u4e4b\u95f4\u7684\u7535\u5bb9\u5bf9\u6d4b\u91cf\u6027\u80fd\u7684\u5f71\u54cd\u8981\u4f4e\u4e8e\u88ab\u6d4b\u5668\u4ef6\u7535\u5bb9\u548c\u7535\u538b\u6e90\u3002\u7136\u800c\uff0c\u5f53\u5b89\u57f9\u8ba1\u81f3\u88ab\u6d4b\u5668\u4ef6\u4e4b\u95f4\u7684\u7535\u7f06\u957f\u5ea6\u589e\u52a0\u65f6\uff0c\u4e24\u7aef\u5b50\u95f4\u7684\u7535\u5bb9\u5c31\u53ef\u80fd\u6210\u4e3a\u4e00\u4e2a\u5927\u95ee\u9898\u3002\u6700\u597d\u7684\u529e\u6cd5\u662f\u4f7f\u7528\u4e00\u6839\u8f83\u77ed\u7684\u7535\u7f06\uff0c\u5c06\u5b89\u57f9\u8ba1\u7f6e\u5165\u5c3d\u53ef\u80fd\u63a5\u8fd1\u88ab\u6d4b\u5668\u4ef6\u7684\u4f4d\u7f6e\u3002\u4f46\u8fd9\u79cd\u65b9\u6cd5\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\u662f\u4e0d\u73b0\u5b9e\u7684\u3002\u6700\u91cd\u8981\u7684\u662f\uff0c\u4fdd\u8bc1 Hi \u548c Lo \u4e24\u7aef\u5b50\u4e4b\u95f4\u6ca1\u6709\u591a\u4f59\u7684\u7535\u5bb9\u3002\u4f8b\u5982\uff0c\u6839\u636e\u7ecf\u9a8c\uff0cB2980A \u7cfb\u5217\u6beb\u5fae\u5fae\u5b89\u8ba1<\/b>\u7cfb\u5217\u5728\u8fdb\u884c\u4f4e\u7535\u5e73\u7535\u6d41\u6d4b\u91cf\u65f6\uff0c\u53ea\u8981\u8bbe\u7f6e\u4e86\u9002\u5f53\u7684\u7a7f\u5b54\u65f6\u95f4\uff0c\u90a3\u4e48 2 \u7c73\u4ee5\u4e0b\u7684\u7535\u7f06\uff08\u76f8\u5f53\u4e8e\u5bc4\u751f\u7535\u5bb9\u5c0f\u4e8e 200 pF\uff09\u5c31\u4e0d\u4f1a\u7ed9\u6d4b\u91cf\u6027\u80fd\u5e26\u6765\u4e25\u91cd\u5f71\u54cd\u3002<\/p>\n

\u5728\u8fdb\u884c\u9ad8\u963b\u6d4b\u91cf\u65f6\uff0c\u60a8\u53ea\u8003\u8651\u5b89\u57f9\u8ba1\u7684 Hi \u7aef\u5b50\u548c Vs \u4e4b\u95f4\u7684\u6cc4\u9732\u7535\u6d41\uff0c\u56e0\u800c\u6211\u4eec\u5f3a\u70c8\u5efa\u8bae\u60a8\u4f7f\u7528 Rmeas-1 \u914d\u7f6e\uff08\u56fe 3\uff09\uff0c\u800c\u4e0d\u662f Rmeas-2\uff08\u56fe 4\uff09\u3002\u5f53 Rmeas-2 \u914d\u7f6e\u5b58\u5728\u4e00\u5b9a\u7684\u7535\u538b\u5dee\u65f6\uff0c\u60a8\u8fd8\u9700\u8981\u8003\u8651 Hi \u7aef\u5b50\u81f3\u6bcf\u4e2a\u5730\u7ebf\u95f4\u7684\u6cc4\u9732\u7535\u6d41\uff08\u5305\u62ec\u8fde\u63a5\u81f3 Vs \u548c\u88ab\u6d4b\u5668\u4ef6\u7684\u63a5\u5730\uff09\u3002\u4e24\u76f8\u6bd4\u8f83\u4e4b\u4e0b\uff0cRmeas-1 \u914d\u7f6e\u66f4\u80dc\u4e00\u7b79\u3002\u5bf9\u4e8e Rmeas-1\uff0c\u60a8\u4e0d\u5fc5\u8d39\u795e\u53bb\u8003\u8651\u5730\u7ebf\u95ee\u9898\uff0c\u56e0\u4e3a\u8be5\u914d\u7f6e\u4e0b\u7684 Hi \u7aef\u63a5\u7535\u538b\u59cb\u7ec8\u5bf9\u5730\u504f\u7f6e\u3002\u4f8b\u5982\uff0cKeysight 16008B \u7535\u963b\u7387\u7535\u6c60\u548c 16339A \u5143\u4ef6\u6d4b\u8bd5\u5939\u5177\uff08\u7528\u4e8e B2985A\/B2987A \u7684\u9644\u4ef6\uff09\u90fd\u91c7\u7528\u4e86 Rmeas-1 \u914d\u7f6e\uff0c\u56e0\u800c\u5b89\u57f9\u8ba1\u7684 Lo \u7aef\u5b50\u53ef\u4ee5\u63a5\u5730\u3002\u6b63\u5982 1.5 \u4e2d\u6240\u8868\u660e\u7684\u90a3\u6837\uff0c\u201c\u7406\u60f3\u201d\u7684\u9694\u79bb\u63aa\u65bd\u80fd\u591f\u6d88\u9664\u6cc4\u9732\u7535\u6d41\uff1b\u4f46\u662f\uff0c\u9694\u79bb\u6548\u679c\u53d6\u51b3\u4e8e\u4eea\u5668\u6240\u9700\u7684\u9694\u79bb\u5b9e\u65bd\u6b21\u6570\u6216\u5b9e\u65bd\u7684\u96be\u6613\u7a0b\u5ea6\u3002<\/p>\n

\u5230\u76ee\u524d\u4e3a\u6b62\uff0c\u9694\u79bb\u6280\u672f\u80fd\u591f\u6709\u6548\u5730\u907f\u514d\u56e0\u6d4b\u91cf\u8bbe\u7f6e\u4e0d\u5f53\u800c\u4ea7\u751f\u6cc4\u6f0f\u7535\u6d41\uff0c\u9694\u79bb\u63aa\u65bd\u53ef\u4ee5\u901a\u8fc7\u540c\u8f74\u8fde\u63a5\u5668\u6216\u7535\u7f06\u5b9e\u73b0\u3002\u800c\u4e14\uff0c\u60a8\u5fc5\u987b\u8981\u6ce8\u610f\u5b89\u57f9\u8ba1\u81f3\u88ab\u6d4b\u5668\u4ef6\u7684\u9694\u79bb\uff0c\u56e0\u4e3a\u540c\u8f74\u5668\u4ef6\u7684\u8fde\u63a5\u5e76\u975e\u59cb\u7ec8\u53ef\u884c\u3002<\/p>\n

B2980A \u7cfb\u5217\u6beb\u5fae\u5fae\u5b89\u8ba1\/\u76ae\u5b89\u8ba1\u548c\u9759\u7535\u8ba1\/\u9ad8\u963b\u8868<\/b><\/h3>\n

\n B2980A<\/b> \u7cfb\u5217\u6beb\u5fae\u5fae\u5b89\u8ba1\/\u76ae\u5b89\u8ba1\u548c\u9759\u7535\u8ba1\/\u9ad8\u963b\u8868\u5177\u6709\u540c\u7c7b\u4ea7\u54c1\u4e2d\u6700\u51fa\u8272\u7684\u6d4b\u91cf\u6027\u80fd\u548c\u524d\u6240\u672a\u6709\u7684\u529f\u80fd\u7279\u6027\uff0c\u4f7f\u60a8\u53ef\u4ee5\u5145\u6ee1\u4fe1\u5fc3\u5730\u6267\u884c\u6d4b\u91cf\u3002 \u76ae\u5b89\u8ba1\u548c\u9759\u7535\u8ba1\u5177\u6709\u5168\u7403\u9886\u5148\u7684\u6027\u80fd\u6c34\u5e73\uff0c\u7535\u6d41\u6d4b\u91cf\u5206\u8fa8\u7387\u53ef\u8fbe 0.01 fA\uff080.01 x 10-15 A\uff09\u3002\n <\/p><\/blockquote>\n

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