[SSassen]

Hier gibst mein bester THD score immer aus einer LTspice simu mit ein wirklich realister class-D entwerf, es ist ein TDA8939 im BTL mit 8-ohm last und 100-watts ausgangsleistung, 500KHz swingfrequenz, 1Vpp eingangs signal.

Zitat:Circuit: * C:\Program Files\LTC\SwCADIII\My Schematics\TDA8939\tda8939_ucd_bridged_final.asc

WARNING: Less than two connections to node NC_01. This node is used by R:U1:6.
Per .tran options, skipping operating point for transient analysis.
Fourier components of I(rload)
DC component:0.00227292

Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+04 5.270e+00 1.000e+00 -127.98° 0.00°
2 2.000e+04 1.691e-04 3.210e-05 58.15° 186.13°
3 3.000e+04 3.061e-04 5.809e-05 -172.92° -44.94°
4 4.000e+04 4.436e-05 8.418e-06 -34.16° 93.82°
5 5.000e+04 1.158e-04 2.197e-05 -29.86° 98.12°
6 6.000e+04 9.625e-05 1.827e-05 123.03° 251.01°
7 7.000e+04 2.697e-04 5.118e-05 -11.75° 116.24°
8 8.000e+04 9.034e-05 1.714e-05 -7.23° 120.75°
9 9.000e+04 6.015e-05 1.141e-05 -164.97° -36.99°
Total Harmonic Distortion: 0.009130%


Date: Tue Dec 13 18:44:12 2005
Total elapsed time: 44.702 seconds.

tnom = 27
temp = 27
method = modified trap
totiter = 252347
traniter = 252347
tranpoints = 86132
accept = 67170
rejected = 18962
trancuriters = 0
matrix size = 188
fillins = 159
solver = Normal

GruB,

Sander.