不断的折腾，回过头还是觉得这个前级线路好。。。

吉二大 · 发表于 2012-11-7 18:06

回复 192# xiaolu36

恩，谢谢

mld · 发表于 2012-12-16 18:45

本帖最后由 mld 于 2012-12-16 18:59 编辑

做了个仿真测试，截图如下：

1、电路图
01-电路图.gif

2、波形图

3、03、最大输出测试图
03-最大输出.gif

4、输入阻抗测试图

5、输出阻抗测试图

6、测试数据记录

Direct Newton iteration for .op point succeeded.
.step a=0.2
Fourier components of V(out)
DC component:0.0188419
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 2.089e+00 1.000e+00 -179.44° 0.00°
2 2.000e+03 3.736e-04 1.788e-04 60.83° 240.27°
3 3.000e+03 1.323e-04 6.333e-05 26.86° 206.29°
4 4.000e+03 9.216e-05 4.411e-05 49.14° 228.57°
5 5.000e+03 8.213e-05 3.931e-05 -15.07° 164.37°
6 6.000e+03 1.499e-04 7.172e-05 -10.15° 169.28°
7 7.000e+03 7.571e-05 3.623e-05 13.24° 192.67°
8 8.000e+03 4.821e-05 2.307e-05 -110.36° 69.08°
9 9.000e+03 6.601e-05 3.159e-05 -73.94° 105.49°
Total Harmonic Distortion: 0.021785%
.step a=0.3
Fourier components of V(out)
DC component:0.0279914
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 3.134e+00 1.000e+00 -179.44° 0.00°
2 2.000e+03 8.974e-04 2.864e-04 69.75° 249.19°
3 3.000e+03 1.120e-04 3.572e-05 -4.93° 174.51°
4 4.000e+03 1.374e-04 4.384e-05 -0.04° 179.39°
5 5.000e+03 1.067e-04 3.406e-05 -1.30° 178.14°
6 6.000e+03 9.219e-05 2.942e-05 1.20° 180.64°
7 7.000e+03 7.405e-05 2.363e-05 -1.95° 177.49°
8 8.000e+03 6.948e-05 2.217e-05 1.93° 181.37°
9 9.000e+03 5.557e-05 1.773e-05 -2.49° 176.95°
Total Harmonic Distortion: 0.029764%
.step a=0.4
Fourier components of V(out)
DC component:0.0369845
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 4.178e+00 1.000e+00 -179.44° 0.00°
2 2.000e+03 1.472e-03 3.522e-04 73.50° 252.93°
3 3.000e+03 1.466e-04 3.508e-05 35.26° 214.70°
4 4.000e+03 1.520e-04 3.638e-05 46.36° 225.79°
5 5.000e+03 1.448e-04 3.466e-05 -21.76° 157.68°
6 6.000e+03 2.764e-04 6.615e-05 -6.97° 172.47°
7 7.000e+03 1.540e-04 3.685e-05 24.46° 203.90°
8 8.000e+03 7.455e-05 1.784e-05 -100.32° 79.12°
9 9.000e+03 1.497e-04 3.584e-05 -60.02° 119.41°
Total Harmonic Distortion: 0.036762%
.step a=0.5
Fourier components of V(out)
DC component:0.0456107
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 5.223e+00 1.000e+00 -179.44° 0.00°
2 2.000e+03 2.453e-03 4.696e-04 77.21° 256.64°
3 3.000e+03 1.199e-04 2.297e-05 152.36° 331.79°
4 4.000e+03 2.274e-04 4.354e-05 63.12° 242.56°
5 5.000e+03 4.279e-04 8.194e-05 -1.96° 177.48°
6 6.000e+03 2.636e-04 5.048e-05 -22.84° 156.60°
7 7.000e+03 6.154e-05 1.178e-05 97.55° 276.98°
8 8.000e+03 1.951e-04 3.735e-05 -27.87° 151.56°
9 9.000e+03 1.364e-04 2.611e-05 -10.58° 168.85°
Total Harmonic Distortion: 0.048417%
.step a=0.6
Fourier components of V(out)
DC component:0.0538449
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 6.267e+00 1.000e+00 -179.44° 0.00°
2 2.000e+03 3.998e-03 6.379e-04 81.66° 261.10°
3 3.000e+03 2.629e-04 4.195e-05 -165.28° 14.16°
4 4.000e+03 3.192e-04 5.093e-05 55.73° 235.17°
5 5.000e+03 7.241e-04 1.155e-04 2.35° 181.78°
6 6.000e+03 6.277e-04 1.002e-04 -60.55° 118.89°
7 7.000e+03 1.836e-04 2.929e-05 -149.14° 30.30°
8 8.000e+03 2.826e-04 4.509e-05 54.24° 233.68°
9 9.000e+03 2.860e-04 4.563e-05 8.45° 187.89°
Total Harmonic Distortion: 0.066308%
.step a=0.7
Fourier components of V(out)
DC component:0.0616915
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 7.312e+00 1.000e+00 -179.44° 0.00°
2 2.000e+03 5.913e-03 8.087e-04 81.88° 261.32°
3 3.000e+03 2.476e-04 3.386e-05 -159.62° 19.82°
4 4.000e+03 4.475e-04 6.120e-05 43.53° 222.97°
5 5.000e+03 9.214e-04 1.260e-04 -1.54° 177.90°
6 6.000e+03 6.786e-04 9.281e-05 -74.14° 105.30°
7 7.000e+03 2.826e-04 3.865e-05 177.49° 356.93°
8 8.000e+03 3.088e-04 4.223e-05 58.35° 237.79°
9 9.000e+03 3.190e-04 4.363e-05 -2.03° 177.40°
Total Harmonic Distortion: 0.082983%
.step a=0.8
Fourier components of V(out)
DC component:0.0692703
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 8.356e+00 1.000e+00 -179.44° 0.00°
2 2.000e+03 8.320e-03 9.957e-04 82.95° 262.39°
3 3.000e+03 1.963e-04 2.349e-05 -120.33° 59.11°
4 4.000e+03 3.338e-04 3.995e-05 -1.67° 177.77°
5 5.000e+03 8.624e-04 1.032e-04 -0.50° 178.94°
6 6.000e+03 6.665e-04 7.976e-05 -70.53° 108.91°
7 7.000e+03 2.302e-04 2.755e-05 178.82° 358.26°
8 8.000e+03 2.643e-04 3.163e-05 48.86° 228.30°
9 9.000e+03 2.529e-04 3.026e-05 -0.88° 178.56°
Total Harmonic Distortion: 0.100660%
.step a=0.9
Fourier components of V(out)
DC component:0.0766628
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 9.400e+00 1.000e+00 -179.44° 0.00°
2 2.000e+03 1.086e-02 1.156e-03 84.00° 263.43°
3 3.000e+03 4.013e-04 4.270e-05 -145.66° 33.77°
4 4.000e+03 4.165e-04 4.431e-05 -28.82° 150.61°
5 5.000e+03 8.242e-04 8.768e-05 4.60° 184.04°
6 6.000e+03 6.724e-04 7.154e-05 -62.59° 116.85°
7 7.000e+03 1.679e-04 1.786e-05 160.46° 339.89°
8 8.000e+03 2.795e-04 2.973e-05 25.51° 204.95°
9 9.000e+03 2.923e-04 3.110e-05 -2.14° 177.30°
Total Harmonic Distortion: 0.116380%
.step a=1
Fourier components of V(out)
DC component:0.0838851
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 1.044e+01 1.000e+00 -179.44° 0.00°
2 2.000e+03 1.367e-02 1.309e-03 84.32° 263.76°
3 3.000e+03 6.172e-04 5.910e-05 -147.95° 31.48°
4 4.000e+03 6.388e-04 6.117e-05 -58.80° 120.64°
5 5.000e+03 8.911e-04 8.533e-05 6.44° 185.88°
6 6.000e+03 7.728e-04 7.400e-05 -61.71° 117.73°
7 7.000e+03 2.027e-04 1.941e-05 -164.91° 14.53°
8 8.000e+03 1.863e-04 1.784e-05 27.90° 207.34°
9 9.000e+03 1.226e-04 1.174e-05 29.51° 208.95°
Total Harmonic Distortion: 0.131695%
.step a=1.1
Fourier components of V(out)
DC component:0.0909048
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 1.149e+01 1.000e+00 -179.44° 0.00°
2 2.000e+03 1.668e-02 1.452e-03 84.28° 263.72°
3 3.000e+03 8.850e-04 7.705e-05 -166.60° 12.84°
4 4.000e+03 8.850e-04 7.705e-05 -87.90° 91.54°
5 5.000e+03 9.431e-04 8.211e-05 -5.76° 173.68°
6 6.000e+03 8.123e-04 7.072e-05 -39.50° 139.94°
7 7.000e+03 4.379e-04 3.812e-05 164.62° 344.06°
8 8.000e+03 3.033e-04 2.641e-05 -35.33° 144.10°
9 9.000e+03 3.241e-04 2.822e-05 -6.46° 172.98°
Total Harmonic Distortion: 0.146101%
.step a=1.2
Fourier components of V(out)
DC component:0.0974451
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 1.253e+01 1.000e+00 -179.44° 0.00°
2 2.000e+03 2.031e-02 1.621e-03 84.99° 264.42°
3 3.000e+03 1.736e-03 1.386e-04 -161.05° 18.39°
4 4.000e+03 1.398e-03 1.116e-04 -83.78° 95.66°
5 5.000e+03 8.513e-04 6.796e-05 14.35° 193.79°
6 6.000e+03 7.680e-04 6.130e-05 -48.88° 130.56°
7 7.000e+03 2.923e-04 2.334e-05 178.66° 358.10°
8 8.000e+03 3.653e-04 2.916e-05 18.82° 198.26°
9 9.000e+03 1.892e-04 1.510e-05 4.76° 184.20°
Total Harmonic Distortion: 0.163426%
.step a=1.3
Fourier components of V(out)
DC component:0.10369
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 1.357e+01 1.000e+00 -179.44° 0.00°
2 2.000e+03 2.421e-02 1.784e-03 84.43° 263.87°
3 3.000e+03 3.139e-03 2.313e-04 -164.52° 14.92°
4 4.000e+03 1.903e-03 1.403e-04 -86.86° 92.57°
5 5.000e+03 1.170e-03 8.619e-05 26.62° 206.06°
6 6.000e+03 7.647e-04 5.635e-05 -65.70° 113.74°
7 7.000e+03 2.304e-04 1.698e-05 -76.08° 103.36°
8 8.000e+03 3.034e-04 2.236e-05 45.88° 225.32°
9 9.000e+03 2.693e-04 1.985e-05 -120.23° 59.21°
Total Harmonic Distortion: 0.180808%
.step a=1.4
Fourier components of V(out)
DC component:0.109145
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 1.461e+01 1.000e+00 -179.44° 0.00°
2 2.000e+03 2.872e-02 1.966e-03 84.26° 263.70°
3 3.000e+03 4.926e-03 3.371e-04 -161.42° 18.02°
4 4.000e+03 1.846e-03 1.264e-04 -97.87° 81.57°
5 5.000e+03 1.482e-03 1.015e-04 32.24° 211.68°
6 6.000e+03 1.012e-03 6.924e-05 -53.83° 125.62°
7 7.000e+03 1.769e-04 1.211e-05 -64.32° 115.12°
8 8.000e+03 8.589e-05 5.878e-06 -163.75° 15.69°
9 9.000e+03 1.184e-04 8.104e-06 95.64° 275.09°
Total Harmonic Distortion: 0.200222%
.step a=1.5
Fourier components of V(out)
DC component:0.11499
Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+03 1.565e+01 1.000e+00 -179.44° 0.00°
2 2.000e+03 3.245e-02 2.073e-03 82.73° 262.17°
3 3.000e+03 6.902e-03 4.410e-04 -154.96° 24.48°
4 4.000e+03 1.933e-03 1.235e-04 -154.56° 24.89°
5 5.000e+03 2.390e-03 1.527e-04 50.38° 229.82°
6 6.000e+03 2.345e-03 1.498e-04 -34.58° 144.87°
7 7.000e+03 8.953e-04 5.720e-05 -77.61° 101.83°
8 8.000e+03 4.575e-04 2.923e-05 -173.38° 6.06°
9 9.000e+03 5.514e-04 3.523e-05 73.92° 253.36°
Total Harmonic Distortion: 0.213510%
Measurement: v_rl
step PP(v(out)) FROM TO
1 4.18512 0 0.002
2 6.275 0 0.002
3 8.36614 0 0.002
4 10.4561 0 0.002
5 12.5428 0 0.002
6 14.6349 0 0.002
7 16.7229 0 0.002
8 18.8157 0 0.002
9 20.9044 0 0.002
10 22.9808 0 0.002
11 25.0736 0 0.002
12 27.1546 0 0.002
13 29.2213 0 0.002
14 31.2955 0 0.002
Measurement: power_out
step AVG(-v(v1)*i(v1)) FROM TO
1 1.50063 0 0.002
2 1.50026 0 0.002
3 1.49991 0 0.002
4 1.49956 0 0.002
5 1.49923 0 0.002
6 1.49892 0 0.002
7 1.49862 0 0.002
8 1.49833 0 0.002
9 1.49804 0 0.002
10 1.49776 0 0.002
11 1.4975 0 0.002
12 1.49726 0 0.002
13 1.49704 0 0.002
14 1.49681 0 0.002
Date: Sun Dec 16 17:50:20 2012
Total elapsed time: 1.813 seconds.
tnom = 27
temp = 27
method = modified trap
totiter = 2441
traniter = 2397
tranpoints = 1141
accept = 1106
rejected = 35
matrix size = 22
fillins = 14
solver = Normal
Matrix Compiler1: 1.73 KB object code size 3.6/2.8/[2.1]
Matrix Compiler2: 1.92 KB object code size 2.4/3.4/[2.0]

复制代码

mld · 发表于 2012-12-16 18:57

最大输入幅值电压 1.5V
最大输出峰峰值电压 31.2955V
最大总谐波失真 Total Harmonic Distortion: 0.213510%
(输入幅值电压 0.2V时 Total Harmonic Distortion: 0.021785%)

mld · 发表于 2012-12-16 19:05

补充:IRF610使用的是威世公司(Vishay) 提供的产品模型数据.

梦遥思远 · 发表于 2012-12-17 09:56

电路简单易做

mld · 发表于 2012-12-17 13:16

本帖最后由 mld 于 2012-12-18 07:39 编辑

这是IRF610管的I-V特性曲线

kuaike123 · 发表于 2012-12-17 14:11

好奇，看看

aatcs · 发表于 2012-12-17 16:42

简洁自有简洁的好处，功放还有直通功能呢

佳博士 · 发表于 2012-12-17 20:12

回复 61# llzqq

不一样，耳放电路无任何交流负反馈，楼主电路既有电流负反馈又有电压负反馈

mld · 发表于 2012-12-18 09:26

本帖最后由 mld 于 2012-12-19 12:54 编辑

. 此贴较火，再作些仿真实验为让朋友们多些参考：

关于管子工作电流调整，根据上面高手的实际制作试验，可调整电阻R2以改变工作点（可参考199#楼的I-V特性曲线），如果用正弦波观察输入波形，应以不波形出现失真为前提。

在作模拟实验发现，此处波形的失真要比输出波形失真出现得“早”些且明显些，这是为什么说要观察此处波形的原因。
1、波形正常时的截图:

2、输入已出现失真，而输出并不明显（这是否与电子管有类似的特点？）

3、输入已严重失真了，而输出的失真却远少于前者（是否声音与电子管类似？）

4、调整电流过大，输出波形出现饱和失真

5、正常状态

6、最佳状态的电路图（采用的是威世公司(Vishay)提供的产品模型数据，不同厂家的产品可能会有少许出入）

7、傅立叶FFT频谱图

8、总谐波失真（这是我用此仿真软件测到的最佳电路之一）

R2的调整在40k～100k范围内，输出幅度和失真度没有多大变化，可能听感有不同，各烧友可根据自己的需要作来调整

另外要注意的是，输入阻抗和输出阻抗对电路性能有影响，输入端前面（CD机）的负载能力最好不大于47k，而输出阻抗虽然很低，但发现在负载大于20k时似乎有失真增大的趋势，所以建议干脆带着10k负载电阻接入下一级吧，反正16Vpp的输出值可满足任何功放！

yufo3 · 发表于 2012-12-19 00:06

长见识学习中。。。

mld · 发表于 2012-12-19 12:55

本帖最后由 mld 于 2012-12-19 13:00 编辑

电路图

iii123 · 发表于 2012-12-19 14:09

学习中长见识

zezhang · 发表于 2012-12-19 15:30

电路简单的，有机会做一个试试

xiaolu36 · 发表于 2012-12-20 12:58

好厉害的仿真。。。可惜手头没有示波器等等工具

lsr238498 · 发表于 2012-12-26 21:01

原来已退烧，至从头看到尾热度又上来了。改天仿制一试。

AXU · 发表于 2013-1-13 19:13

洞洞板搞了一个317稳压27V底噪很静，音质不错，多谢楼主提供如此简单的线路

AXU · 发表于 2013-1-13 19:15

电压调不到电源的一半不短是什么回事

叮当 · 发表于 2013-1-14 01:11

简单实用，有时间做一个。。

总统 · 发表于 2013-1-14 15:37

回复 197# jkw789

请问这个原图中是几倍放大的？30v的变压器可用吗？输出的2u电容可以换成别的容量吗，想动手弄一个

[分立前级] 不断的折腾，回过头还是觉得这个前级线路好。。。