Report
Group: 2
Section: 6
Aleksandra Szpiech
Patryk Piwowarczyk
Wojciech Bieniek
Lab. 6
Tutor name: Damian Grzechca
Setup
Uamp = 5.95 [V]
Rg = 50 [Ω]
Board A: 6
Board B: 12
Characteristic points
Gain = 20 * log{10}(Uin / Uout) [dB]
Board A - unloaded, minimum
Gain = -15.83 dB
f = 1.35 kHz
Board A - unloaded, maximum
Gain = 13.57 dB
f = 2.47 kHz
Board A - low load, minimum
Gain = -21.29 dB
f = 1.35 kHz
Board A - low load, maximum
Gain = -16.29 dB
f = 740 Hz
Board A - high load, minimum
Gain = -16.69 dB
f = 1.35 Hz
Board A - high load, maximum
Gain = 11.65 dB
f = 2.46 kHz
Board B - low load, minimum
Gain = -16.11 dB
f = 3.38 kHz
Board B - low load, maximum
Gain = -11.06 dB
f = 2.27 kHz
Board B - high load, maximum
Gain = 2.93 dB
f = 2.47 kHz
There exists only a local maximum.
Acquired data
| f [Hz] | A_U [dB] | A_L [dB] | A_H [dB] | B_L [dB] | B_H [dB] |
|---|---|---|---|---|---|
| 20 | -9,87896654681324 | -42,3826423503153 | -18,4370311878029 | -48,1887649557594 | -48,1359630324352 |
| 36 | -9,96415305193732 | -38,2196538243288 | -14,5317453874436 | -48,1153069236799 | -48,1565701349554 |
| 66 | -9,90218449202975 | -33,6355597933518 | -11,8773102542538 | -28,1474034983719 | -48,0421186985248 |
| 121 | -9,90218449202975 | -28,7145713912287 | -10,6875396879254 | -48,147403498372 | -47,8560073803925 |
| 171 | -10,3826079545435 | ||||
| 222 | -10,0497745281591 | -23,8674215300127 | -10,3150131415159 | -48,1153069236799 | -46,1238816252798 |
| 313 | -10,341442523756 | ||||
| 405 | -10,4368695569746 | -19,1702619515329 | -10,5758467560812 | -47,1952586647173 | -39,7145225322586 |
| 572 | -17,1334869942812 | ||||
| 656 | -16,4162062589788 | ||||
| 740 | -11,8583322377619 | -16,295307230089 | -11,9391317937967 | -42,755793017492 | -29,2397502318121 |
| 1045 | -14,544101852525 | -17,4806669395666 | -14,8465424899214 | ||
| 1197 | -16,0890892304395 | -19,8368799076417 | |||
| 1350 | -15,827590322348 | -21,2875094159911 | -16,6874834924497 | -29,6880601886886 | -16,6658724149371 |
| 1655 | -21,3701613132568 | ||||
| 1721 | -4,68166412066736 | -11,1343658509623 | -5,34446866409556 | -9,23975023181211 | |
| 1907 | 0,269834280343538 | -8,1172098461627 | -0,38801988415121 | -5,37987527327345 | |
| 1960 | -12,8492697733001 | ||||
| 2093 | 5,94539693581349 | -6,16764387836007 | 4,93060070034161 | -1,33549787860021 | |
| 2265 | -11,0598084005775 | ||||
| 2279 | 12,2026951227217 | -4,69371948643057 | 10,1796027152756 | 2,42538717735002 | |
| 2465 | 13,5742234100041 | -3,78877580583652 | 11,6545758453381 | -13,1086161443035 | 2,92848156562638 |
| 2770 | -14,8280086137101 | ||||
| 3075 | -15,7292672044884 | ||||
| 3143 | -3,09803919971486 | ||||
| 3380 | -16,1079336248332 | ||||
| 3483 | 4,09016994405393 | 4,08499671985576 | -4,86590816773611 | ||
| 3822 | -5,91756324075088 | ||||
| 3992 | 2,84261502553462 | ||||
| 4161 | -6,66112759210396 | ||||
| 4501 | 2,16678949577676 | -0,998956426180212 | 2,10654468124522 | -16,0292090106513 | -7,33207041932968 |
| 5987 | -15,03086536726 | ||||
| 6730 | -14,4892318681714 | ||||
| 7473 | -14,1877047852912 | ||||
| 8217 | 0,618545029601201 | -0,285529035175246 | 0,600646360740557 | -13,6546561093067 | -9,23762576325851 |
| 15000 | 0,183727194878365 | -0,1087109264271 | 0,184160035736475 | -11,796510698219 | -9,81486374930902 |
Drawn characteristics
Simulated characteristics
Board A - unloaded
Board A - low load
Board A - high load
Board B - low load
Board B - high load
Phase shift
Board A - phase shift
Board B - phase shift
Conclusions
Board A - phase shift
Board B - phase shift
We can observe gain spikes in resonance frequencies. This is characteristic for 2nd order circuits. Depending on the load however, the spikes can dissapear.
For all cases we had high-pass filter characteristics.