晶体振荡器在电路中是干什么用的
\u6676\u4f53\u632f\u8361\u5668\u662f\u5e72\u4ec0\u4e48\u7528\u7684\uff1f\u6676\u4f53\u632f\u8361\u5668 \u77f3\u82f1\u6676\u4f53\u632f\u8361\u5668\u662f\u4e00\u79cd\u9ad8\u7cbe\u5ea6\u548c\u9ad8\u7a33\u5b9a\u5ea6\u7684\u632f\u8361\u5668\uff0c\u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5f69\u7535\u3001\u8ba1\u7b97\u673a\u3001\u9065\u63a7\u5668\u7b49\u5404\u7c7b\u632f\u8361\u7535\u8def\u4e2d\uff0c\u4ee5\u53ca\u901a\u4fe1\u7cfb\u7edf\u4e2d\u7528\u4e8e\u9891\u7387\u53d1\u751f\u5668\u3001\u4e3a\u6570\u636e\u5904\u7406\u8bbe\u5907\u4ea7\u751f\u65f6\u949f\u4fe1\u53f7\u548c\u4e3a\u7279\u5b9a\u7cfb\u7edf\u63d0\u4f9b\u57fa\u51c6\u4fe1\u53f7\u3002
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\u6676\u4f53\u632f\u8361\u5668\u7684\u5e94\u7528
1\uff0e\u901a\u7528\u6676\u4f53\u632f\u8361\u5668\uff0c\u7528\u4e8e\u5404\u79cd\u7535\u8def\u4e2d\uff0c\u4ea7\u751f\u632f\u8361\u9891\u7387\u3002
2\uff0e\u65f6\u949f\u8109\u51b2\u7528\u77f3\u82f1\u6676\u4f53\u8c10\u632f\u5668\uff0c\u4e0e\u5176\u5b83\u5143\u4ef6\u914d\u5408\u4ea7\u751f\u6807\u51c6\u8109\u51b2\u4fe1\u53f7\uff0c\u5e7f\u6cdb\u7528\u4e8e\u6570\u5b57\u7535\u8def\u4e2d\u3002
3\uff0e\u5fae\u5904\u7406\u5668\u7528\u77f3\u82f1\u6676\u4f53\u8c10\u632f\u5668\u3002
4\uff0eCTVVTR\u7528\u77f3\u82f1\u6676\u4f53\u8c10\u632f\u5668\u3002
5\uff0e\u949f\u8868\u7528\u77f3\u82f1\u6676\u4f53\u632f\u8361\u5668\u3002
\u6676\u4f53\u632f\u8361\u5668\u7684\u6280\u672f\u6307\u6807
1.\u603b\u9891\u5dee\uff1a\u5728\u89c4\u5b9a\u7684\u65f6\u95f4\u5185\uff0c\u7531\u4e8e\u89c4\u5b9a\u7684\u5de5\u4f5c\u548c\u975e\u5de5\u4f5c\u53c2\u6570\u5168\u90e8\u7ec4\u5408\u800c\u5f15\u8d77\u7684\u6676\u4f53\u632f\u8361
\u5668\u9891\u7387\u4e0e\u7ed9\u5b9a\u6807\u79f0\u9891\u7387\u7684\u6700\u5927\u9891\u5dee\u3002
\u8bf4\u660e\uff1a\u603b\u9891\u5dee\u5305\u62ec\u9891\u7387\u6e29\u5ea6\u7a33\u5b9a\u5ea6\u3001\u9891\u7387\u6e29\u5ea6\u51c6\u786e\u5ea6\u3001\u9891\u7387\u8001\u5316\u7387\u3001\u9891\u7387\u7535\u6e90\u7535\u538b\u7a33
\u5b9a\u5ea6\u548c\u9891\u7387\u8d1f\u8f7d\u7a33\u5b9a\u5ea6\u5171\u540c\u9020\u6210\u7684\u6700\u5927\u9891\u5dee\u3002\u4e00\u822c\u53ea\u5728\u5bf9\u77ed\u671f\u9891\u7387\u7a33\u5b9a\u5ea6\u5173\u5fc3\uff0c\u800c\u5bf9\u5176\u4ed6\u9891
\u7387\u7a33\u5b9a\u5ea6\u6307\u6807\u4e0d\u4e25\u683c\u8981\u6c42\u7684\u573a\u5408\u91c7\u7528\u3002\u4f8b\u5982\uff1a\u7cbe\u5bc6\u5236\u5bfc\u96f7\u8fbe\u3002
2. \u9891\u7387\u6e29\u5ea6\u7a33\u5b9a\u5ea6\uff1a\u5728\u6807\u79f0\u7535\u6e90\u548c\u8d1f\u8f7d\u4e0b\uff0c\u5de5\u4f5c\u5728\u89c4\u5b9a\u6e29\u5ea6\u8303\u56f4\u5185\u7684\u4e0d\u5e26\u9690\u542b\u57fa\u51c6\u6e29\u5ea6
\u6216\u5e26\u9690\u542b\u57fa\u51c6\u6e29\u5ea6\u7684\u6700\u5927\u5141\u8bb8\u9891\u504f\u3002
fT=\u00b1(fmax-fmin)/(fmax+fmin)
fTref \uff1d\u00b1MAX[\uff5c(fmax-fref)/fref\uff5c,\uff5c(fmin-fref)/fref\uff5c] fT\uff1a\u9891\u7387\u6e29\u5ea6\u7a33\u5b9a\u5ea6
(\u4e0d\u5e26\u9690\u542b\u57fa\u51c6\u6e29\u5ea6)
fTref\uff1a\u9891\u7387\u6e29\u5ea6\u7a33\u5b9a\u5ea6(\u5e26\u9690\u542b\u57fa\u51c6\u6e29\u5ea6)
fmax \uff1a\u89c4\u5b9a\u6e29\u5ea6\u8303\u56f4\u5185\u6d4b\u5f97\u7684\u6700\u9ad8\u9891\u7387
fmin\uff1a\u89c4\u5b9a\u6e29\u5ea6\u8303\u56f4\u5185\u6d4b\u5f97\u7684\u6700\u4f4e\u9891\u7387
fref\uff1a\u89c4\u5b9a\u57fa\u51c6\u6e29\u5ea6\u6d4b\u5f97\u7684\u9891\u7387
\u8bf4\u660e\uff1a\u91c7\u7528fTref\u6307\u6807\u7684\u6676\u4f53\u632f\u8361\u5668\u5176\u751f\u4ea7\u96be\u5ea6\u8981\u9ad8\u4e8e\u91c7\u7528fT\u6307\u6807\u7684\u6676\u4f53\u632f\u8361\u5668,\u6545
fTref\u6307\u6807\u7684\u6676\u4f53\u632f\u8361\u5668\u552e\u4ef7\u8f83\u9ad8\u3002
3. \u9891\u7387\u7a33\u5b9a\u9884\u70ed\u65f6\u95f4\uff1a\u4ee5\u6676\u4f53\u632f\u8361\u5668\u7a33\u5b9a\u8f93\u51fa\u9891\u7387\u4e3a\u57fa\u51c6\uff0c\u4ece\u52a0\u7535\u5230\u8f93\u51fa\u9891\u7387\u5c0f\u4e8e\u89c4\u5b9a
\u9891\u7387\u5141\u5dee\u6240\u9700\u8981\u7684\u65f6\u95f4\u3002
\u8bf4\u660e\uff1a\u5728\u591a\u6570\u5e94\u7528\u4e2d\uff0c\u6676\u4f53\u632f\u8361\u5668\u662f\u957f\u671f\u52a0\u7535\u7684\uff0c\u7136\u800c\u5728\u67d0\u4e9b\u5e94\u7528\u4e2d\u6676\u4f53\u632f\u8361\u5668\u9700\u8981
\u9891\u7e41\u7684\u5f00\u673a\u548c\u5173\u673a\uff0c\u8fd9\u65f6\u9891\u7387\u7a33\u5b9a\u9884\u70ed\u65f6\u95f4\u6307\u6807\u9700\u8981\u88ab\u8003\u8651\u5230\uff08\u5c24\u5176\u662f\u5bf9\u4e8e\u5728\u82db\u523b\u73af\u5883\u4e2d\u4f7f
\u7528\u7684\u519b\u7528\u901a\u8baf\u7535\u53f0\uff0c\u5f53\u8981\u6c42\u9891\u7387\u6e29\u5ea6\u7a33\u5b9a\u5ea6\u2264\u00b10.3ppm(-45\u2103\uff5e85\u2103)\uff0c\u91c7\u7528OCXO\u4f5c\u4e3a\u672c
\u632f\uff0c\u9891\u7387\u7a33\u5b9a\u9884\u70ed\u65f6\u95f4\u5c06\u4e0d\u5c11\u4e8e5\u5206\u949f\uff0c\u800c\u91c7\u7528DTCXO\u53ea\u9700\u8981\u5341\u51e0\u79d2\u949f)\u3002
4. \u9891\u7387\u8001\u5316\u7387\uff1a\u5728\u6052\u5b9a\u7684\u73af\u5883\u6761\u4ef6\u4e0b\u6d4b\u91cf\u632f\u8361\u5668\u9891\u7387\u65f6\uff0c\u632f\u8361\u5668\u9891\u7387\u548c\u65f6\u95f4\u4e4b\u95f4\u7684\u5173
\u7cfb\u3002\u8fd9\u79cd\u957f\u671f\u9891\u7387\u6f02\u79fb\u662f\u7531\u6676\u4f53\u5143\u4ef6\u548c\u632f\u8361\u5668\u7535\u8def\u5143\u4ef6\u7684\u7f13\u6162\u53d8\u5316\u9020\u6210\u7684\uff0c\u53ef\u7528\u89c4\u5b9a\u65f6\u9650\u540e
\u7684\u6700\u5927\u53d8\u5316\u7387\uff08\u5982\u00b110ppb/\u5929\uff0c\u52a0\u753572\u5c0f\u65f6\u540e\uff09\uff0c\u6216\u89c4\u5b9a\u7684\u65f6\u9650\u5185\u6700\u5927\u7684\u603b\u9891\u7387\u53d8\u5316\uff08\u5982\uff1a
\u00b11ppm/\uff08\u7b2c\u4e00\u5e74\uff09\u548c\u00b15ppm/\uff08\u5341\u5e74\uff09\uff09\u6765\u8868\u793a\u3002
\u8bf4\u660e\uff1aTCXO\u7684\u9891\u7387\u8001\u5316\u7387\u4e3a\uff1a\u00b10.2ppm\uff5e\u00b12ppm\uff08\u7b2c\u4e00\u5e74\uff09\u548c\u00b11ppm\uff5e\u00b15ppm\uff08\u5341
\u5e74\uff09\uff08\u9664\u7279\u6b8a\u60c5\u51b5\uff0cTCXO\u5f88\u5c11\u91c7\u7528\u6bcf\u5929\u9891\u7387\u8001\u5316\u7387\u7684\u6307\u6807\uff0c\u56e0\u4e3a\u5373\u4f7f\u5728\u5b9e\u9a8c\u5ba4\u7684\u6761\u4ef6\u4e0b\uff0c\u6e29
\u5ea6\u53d8\u5316\u5f15\u8d77\u7684\u9891\u7387\u53d8\u5316\u4e5f\u5c06\u5927\u5927\u8d85\u8fc7\u6e29\u5ea6\u8865\u507f\u6676\u4f53\u632f\u8361\u5668\u6bcf\u5929\u7684\u9891\u7387\u8001\u5316\uff0c\u56e0\u6b64\u8fd9\u4e2a\u6307\u6807\u5931
\u53bb\u4e86\u5b9e\u9645\u7684\u610f\u4e49\uff09\u3002OCXO\u7684\u9891\u7387\u8001\u5316\u7387\u4e3a\uff1a\u00b10.5ppb\uff5e\u00b110ppb/\u5929\uff08\u52a0\u753572\u5c0f\u65f6\u540e\uff09\uff0c\u00b1
30ppb\uff5e\u00b12ppm\uff08\u7b2c\u4e00\u5e74\uff09\uff0c\u00b10.3ppm\uff5e\u00b13ppm\uff08\u5341\u5e74\uff09\u3002
5.\u9891\u7387\u538b\u63a7\u8303\u56f4\uff1a\u5c06\u9891\u7387\u63a7\u5236\u7535\u538b\u4ece\u57fa\u51c6\u7535\u538b\u8c03\u5230\u89c4\u5b9a\u7684\u7ec8\u70b9\u7535\u538b\uff0c\u6676\u4f53\u632f\u8361\u5668\u9891\u7387\u7684
\u6700\u5c0f\u5cf0\u503c\u6539\u53d8\u91cf\u3002
\u8bf4\u660e\uff1a\u57fa\u51c6\u7535\u538b\u4e3a\uff0b2.5V\uff0c\u89c4\u5b9a\u7ec8\u70b9\u7535\u538b\u4e3a\uff0b0.5V\u548c\uff0b4.5V\uff0c\u538b\u63a7\u6676\u4f53\u632f\u8361\u5668\u5728\uff0b
0.5V\u9891\u7387\u63a7\u5236\u7535\u538b\u65f6\u9891\u7387\u6539\u53d8\u91cf\u4e3a-110ppm\uff0c\u5728\uff0b4.5V\u9891\u7387\u63a7\u5236\u7535\u538b\u65f6\u9891\u7387\u6539\u53d8\u91cf\u4e3a\uff0b
130ppm\uff0c\u5219VCXO\u7535\u538b\u63a7\u5236\u9891\u7387\u538b\u63a7\u8303\u56f4\u8868\u793a\u4e3a\uff1a\u2265\u00b1100ppm(2.5V\u00b12V)\u3002
6.\u538b\u63a7\u9891\u7387\u54cd\u5e94\u8303\u56f4\uff1a\u5f53\u8c03\u5236\u9891\u7387\u53d8\u5316\u65f6\uff0c\u5cf0\u503c\u9891\u504f\u4e0e\u8c03\u5236\u9891\u7387\u4e4b\u95f4\u7684\u5173\u7cfb\u3002\u901a\u5e38\u7528\u89c4
\u5b9a\u7684\u8c03\u5236\u9891\u7387\u6bd4\u89c4\u5b9a\u7684\u8c03\u5236\u57fa\u51c6\u9891\u7387\u4f4e\u82e5\u5e72dB\u8868\u793a\u3002
\u8bf4\u660e\uff1aVCXO\u9891\u7387\u538b\u63a7\u8303\u56f4\u9891\u7387\u54cd\u5e94\u4e3a0\uff5e10kHz\u3002
7.\u9891\u7387\u538b\u63a7\u7ebf\u6027\uff1a\u4e0e\u7406\u60f3\uff08\u76f4\u7ebf\uff09\u51fd\u6570\u76f8\u6bd4\u7684\u8f93\u51fa\u9891\u7387-\u8f93\u5165\u63a7\u5236\u7535\u538b\u4f20\u8f93\u7279\u6027\u7684\u4e00\u79cd\u91cf
\u5ea6\uff0c\u5b83\u4ee5\u767e\u5206\u6570\u8868\u793a\u6574\u4e2a\u8303\u56f4\u9891\u504f\u7684\u53ef\u5bb9\u8bb8\u975e\u7ebf\u6027\u5ea6\u3002
\u8bf4\u660e\uff1a\u5178\u578b\u7684VCXO\u9891\u7387\u538b\u63a7\u7ebf\u6027\u4e3a\uff1a\u2264\u00b110%\uff0c\u2264\u00b120%\u3002\u7b80\u5355\u7684VCXO\u9891\u7387\u538b\u63a7\u7ebf\u6027\u8ba1
\u7b97\u65b9\u6cd5\u4e3a(\u5f53\u9891\u7387\u538b\u63a7\u6781\u6027\u4e3a\u6b63\u6781\u6027\u65f6)\uff1a
\u9891\u7387\u538b\u63a7\u7ebf\u6027\uff1d\u00b1((fmax-fmin)/ f0)\u00d7100%
fmax\uff1aVCXO\u5728\u6700\u5927\u538b\u63a7\u7535\u538b\u65f6\u7684\u8f93\u51fa\u9891\u7387
fmin\uff1aVCXO\u5728\u6700\u5c0f\u538b\u63a7\u7535\u538b\u65f6\u7684\u8f93\u51fa\u9891\u7387
f0\uff1a\u538b\u63a7\u4e2d\u5fc3\u7535\u538b\u9891\u7387
8.\u5355\u8fb9\u5e26\u76f8\u4f4d\u566a\u58f0\uffe1(f)\uff1a\u504f\u79bb\u8f7d\u6ce2f\u5904\uff0c\u4e00\u4e2a\u76f8\u4f4d\u8c03\u5236\u8fb9\u5e26\u7684\u529f\u7387\u5bc6\u5ea6\u4e0e\u8f7d\u6ce2\u529f\u7387\u4e4b
\u6bd4\u3002
\u76f8\u5f53\u4e8e\u82af\u7247\u7684\u5fc3\u810f,\u7b2c\u632f\u8361\u4e00\u6b21,\u82af\u7247\u5185\u90e8\u7684\u7535\u8def(\u6570\u5b57\u7535\u8def)\u5c31\u6309\u8bbe\u5b9a\u597d\u7684\u529f\u80fd\u8fd0\u884c\u4e00\u6b21;
\u8981\u60f3\u901f\u5ea6\u5feb,\u90a3\u4e48\u8981\u63d0\u9ad8\u6676\u632f\u7684\u9891\u7387\u6216\u591a\u7ea7\u6d41\u6c34\u5de5\u4f5c;
给点 分吧
就像你的心跳一样。
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