POT4a measurements
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Contents
X7
Vref = 9.77V
X10 (2-5-06)
Vref
9.80V cold 9.75V warm
DC test
i = [-3870 -1114 -617 561 1298 2810] o = [-8270 -2380 -1323 1200 2779 5980] polyfit(i,o,1) 2.1345 -4.1022
Derivative test (3.8Vpp input triangle)
dVi/dT = 3.8V * 2 * f
Freq : Output voltage 8 Hz : 50mVpp 13 Hz : 100mVpp 40 Hz : 300mVpp 81 Hz : 600mVpp 160 Hz : 1.2Vpp 438 Hz : 2.4Vpp
fi = [8 13 40 81 160 438] vo = [.05 .1 .3 .6 1.2 2.4] dvidt = 3.8 * 2 * fi 1000 * vo./dvidt = 0.8224 1.0121 0.9868 0.9747 0.9868 0.7210
dropping first and last: VOut = dVi/dT * 9.901e-4
System Freq Response
- Input 8Vpp sine wave
1/sqrt(2) : 1.23KHz (LP2), 1.8KHz (no LP2) 1/2 @ 1.66K 1/3 @ 1.987 1/4 @ 2.42K 1/8 @ 3.14K
21 dB in 2.55x 18 dB in 1.89x
X5 (2-5-06)
Vref
9.85V cold 9.79V warm
i = [-3750 -2104 -1222 -863 -386 -339 -79.9 166.2 496 507 1104 2463 3955 ] o = [-8040 -4490 -2609 -1840 -820 -727 -166.9 357.9 1065 1086 2365 5250 8510 ] polyfit(i,o,1) 2.1434 4.1506
X8 (2-6-06)
Vref
9.82V cold 9.76V warm
i = [-4020 -3065 -2014 -993 -141.8 151.3 997 1933 3152 3985] o = [-8575 -6520 -4280 -2114 -302 319.5 2120 4110 6705 8520] polyfit(i,o,1) 2.1314 1.6536
Fc : 1.266 KHz, 1.886 KHz Fc/4 : 2.475 KHz, 5.211 KHz
21 Hz : 150 mVpp 38 Hz : 300 mVpp 77 Hz : 600 mVpp 127 Hz : 1 Vpp 203 Hz : 1.6 Vpp
