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发表于 2011-8-11 02:07:32
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-------------------------------------- 实测参数 -------------------------------------------------------------
输入电压 :二手稳压电源:1.06890(v)
电压测量 :二手的HP3468A台式万用表(5位半)
运放型号 :LF411C, 1元/片
参数 :输入失调电压(mv): LF411A: 0.3-0.5, LF411: 0.8-2.0, 实测:+0.205 (-70dB时), +0.215(0dB时)
测量(校正) :应用了输入失调电压(+0.207)
设置分贝 测量 测量(校正) 理论 输出压差 理论值的百分比 输出近似dB 分贝差
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DB= 73, -0.000024, -0.000231, -0.000240, -0.000009 -3.580189%, -73, -0.30650
DB= 72, -0.000071, -0.000278, -0.000268, 0.000010 3.683872%, -72, 0.30215
DB= 71, -0.000105, -0.000312, -0.000302, 0.000010 3.391568%, -71, 0.30435
DB= 70, -0.000130, -0.000337, -0.000338, -0.000001 -0.433201%, -70, -0.02614
DB= 69, -0.000176, -0.000383, -0.000379, 0.000004 0.990037%, -69, 0.08523
DB= 68, -0.000217, -0.000424, -0.000425, -0.000001 -0.263820%, -68, -0.03142
DB= 67, -0.000273, -0.000480, -0.000477, 0.000003 0.604690%, -67, 0.04608
DB= 66, -0.000352, -0.000559, -0.000536, 0.000023 4.243483%, -66, 0.36949
DB= 65, -0.000399, -0.000606, -0.000601, 0.000005 0.749720%, -65, 0.07071
DB= 64, -0.000464, -0.000671, -0.000675, -0.000004 -0.576772%, -64, -0.04429
DB= 63, -0.000552, -0.000759, -0.000756, 0.000003 0.337028%, -63, 0.02609
DB= 62, -0.000660, -0.000867, -0.000849, 0.000018 2.093400%, -62, 0.18164
DB= 61, -0.000750, -0.000957, -0.000953, 0.000004 0.397784%, -61, 0.03950
DB= 60, -0.000861, -0.001068, -0.001069, -0.000001 -0.133563%, -60, -0.00732
DB= 59, -0.000965, -0.001172, -0.001200, -0.000028 -2.326887%, -59, -0.20019
DB= 58, -0.001135, -0.001342, -0.001346, -0.000004 -0.275343%, -58, -0.02369
DB= 57, -0.001279, -0.001486, -0.001510, -0.000024 -1.578957%, -57, -0.13837
DB= 56, -0.001510, -0.001717, -0.001694, 0.000023 1.335955%, -56, 0.11666
DB= 55, -0.001692, -0.001899, -0.001901, -0.000002 -0.121882%, -55, -0.00824
DB= 54, -0.001934, -0.002141, -0.002133, 0.000008 0.387391%, -54, 0.03359
DB= 53, -0.002155, -0.002362, -0.002393, -0.000031 -1.283100%, -53, -0.11314
DB= 52, -0.002475, -0.002682, -0.002685, -0.000003 -0.122536%, -52, -0.00957
DB= 51, -0.002805, -0.003012, -0.003013, -0.000001 -0.017886%, -51, -0.00164
DB= 50, -0.003180, -0.003387, -0.003381, 0.000006 0.190296%, -50, 0.01756
DB= 49, -0.003626, -0.003833, -0.003792, 0.000041 1.069682%, -49, 0.09203
DB= 48, -0.004044, -0.004251, -0.004255, -0.000004 -0.100388%, -48, -0.00892
DB= 47, -0.004572, -0.004779, -0.004775, 0.000004 0.079550%, -47, 0.00800
DB= 46, -0.005129, -0.005336, -0.005357, -0.000021 -0.397956%, -46, -0.03443
DB= 45, -0.005818, -0.006025, -0.006012, 0.000013 0.219353%, -45, 0.02040
DB= 44, -0.006552, -0.006759, -0.006745, 0.000014 0.210357%, -44, 0.01891
DB= 43, -0.007396, -0.007603, -0.007568, 0.000035 0.468812%, -43, 0.04096
DB= 42, -0.008288, -0.008495, -0.008491, 0.000004 0.045205%, -42, 0.00453
DB= 41, -0.009339, -0.009546, -0.009527, 0.000019 0.200050%, -41, 0.01769
DB= 40, -0.010493, -0.010700, -0.010690, 0.000010 0.092123%, -40, 0.00893
DB= 39, -0.011805, -0.012012, -0.011994, 0.000018 0.149680%, -39, 0.01356
DB= 38, -0.013272, -0.013479, -0.013458, 0.000021 0.156014%, -38, 0.01441
DB= 37, -0.014930, -0.015137, -0.015100, 0.000037 0.242591%, -37, 0.02205
DB= 36, -0.016755, -0.016962, -0.016943, 0.000019 0.114884%, -36, 0.01080
DB= 35, -0.018814, -0.019021, -0.019010, 0.000011 0.057823%, -35, 0.00593
DB= 34, -0.021145, -0.021352, -0.021329, 0.000023 0.106409%, -34, 0.01003
DB= 33, -0.023775, -0.023982, -0.023932, 0.000050 0.209025%, -33, 0.01897
DB= 32, -0.026699, -0.026906, -0.026852, 0.000054 0.202070%, -32, 0.01824
DB= 31, -0.029995, -0.030202, -0.030128, 0.000074 0.244689%, -31, 0.02197
DB= 30, -0.033635, -0.033842, -0.033804, 0.000038 0.111002%, -30, 0.01038
DB= 29, -0.037731, -0.037938, -0.037929, 0.000009 0.023105%, -29, 0.00275
DB= 28, -0.042416, -0.042623, -0.042558, 0.000065 0.153708%, -28, 0.01414
DB= 27, -0.047642, -0.047849, -0.047750, 0.000099 0.207909%, -27, 0.01872
DB= 26, -0.053440, -0.053647, -0.053576, 0.000071 0.132646%, -26, 0.01217
DB= 25, -0.060024, -0.060231, -0.060114, 0.000117 0.194975%, -25, 0.01766
DB= 24, -0.067374, -0.067581, -0.067449, 0.000132 0.196049%, -24, 0.01775
DB= 23, -0.075611, -0.075818, -0.075678, 0.000140 0.185166%, -23, 0.01670
DB= 22, -0.084835, -0.085042, -0.084912, 0.000130 0.152935%, -22, 0.01393
DB= 21, -0.095265, -0.095472, -0.095273, 0.000199 0.208913%, -21, 0.01878
DB= 20, -0.106876, -0.107083, -0.106899, 0.000184 0.172261%, -20, 0.01567
DB= 19, -0.120004, -0.120211, -0.119942, 0.000269 0.224356%, -19, 0.02014
DB= 18, -0.134425, -0.134632, -0.134577, 0.000055 0.040643%, -18, 0.00422
DB= 17, -0.150850, -0.151057, -0.150998, 0.000059 0.039301%, -17, 0.00408
DB= 16, -0.169286, -0.169493, -0.169422, 0.000071 0.041726%, -16, 0.00429
DB= 15, -0.190035, -0.190242, -0.190095, 0.000147 0.077381%, -15, 0.00739
DB= 14, -0.213271, -0.213478, -0.213290, 0.000188 0.088290%, -14, 0.00832
DB= 13, -0.239339, -0.239546, -0.239315, 0.000231 0.096336%, -13, 0.00904
DB= 12, -0.268042, -0.268249, -0.268516, -0.000267 -0.099425%, -12, -0.00798
DB= 11, -0.300880, -0.301087, -0.301280, -0.000193 -0.064107%, -11, -0.00490
DB= 10, -0.337750, -0.337957, -0.338042, -0.000085 -0.025083%, -10, -0.00151
DB= 9, -0.379030, -0.379237, -0.379289, -0.000052 -0.013716%, -9, -0.00053
DB= 8, -0.425230, -0.425437, -0.425570, -0.000133 -0.031173%, -8, -0.00204
DB= 7, -0.477220, -0.477427, -0.477497, -0.000070 -0.014636%, -7, -0.00060
DB= 6, -0.532610, -0.532817, -0.535760, -0.002943 -0.549231%, -6, -0.04718
DB= 5, -0.598220, -0.598427, -0.601133, -0.002706 -0.450091%, -5, -0.03852
DB= 4, -0.671360, -0.671567, -0.674481, -0.002914 -0.432030%, -4, -0.03695
DB= 3, -0.753900, -0.754107, -0.756780, -0.002673 -0.353192%, -3, -0.03008
DB= 2, -0.845770, -0.845977, -0.849121, -0.003144 -0.370238%, -2, -0.03157
DB= 1, -0.949430, -0.949637, -0.952729, -0.003092 -0.324533%, -1, -0.02759
DB= 0, -1.066080, -1.066287, -1.068978, -0.002691 -0.251728%, 0, -0.02126 |
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