In this recording of a live-streamed exercise, I calculated and measured the transfer function between the open-circuit output voltage and input voltage of two low-pass RC filters and one low-pass RL filter using an USB-powered oscilloscope (PicoScope PicoScope 2204A) and the frequency-response analysis software FRA4PicoScope by Aaron Hexamer.
The series resistance was R = 1000 Ω. The corresponding shunt capacitances were C = 0.22 µF and C = 10 nF.
The series inductance was L = 31.8 µH (and not 1 mH as mentioned in the video) with a corresponding shunt resistance of R = 10 Ω. For the measurement of the frequency-dependent impedance of this inductor, see: ua-cam.com/video/pNXdcXYlh8U/v-deo.html
PicoScope PicoScope 2204A:
www.picotech.com/oscilloscope/2000/picoscope-2000-overview
FRA4PicoScope by Aaron Hexamer:
bitbucket.org/hexamer/fra4picoscope/wiki/Home
Notes:
(to be added)
GNU octave commands for the 1st RC filter:
(to be added)
GNU octave commands for the 2nd RC filter:
(to be added)
GNU octave commands for the LR filter:
(to be added)
Chapter marks:
00:00 Introduction
01:00 Capacitor with 0.22 µF
04:24 Resistor with 1 kΩ
05:21 Setup of the oscilloscope
08:14 Calculation in GNU Octave
10:16 FRA4PicoScope measurement
13:12 Würth Elektronik EMC filter demo kit
14:56 Capacitor with 10 nF
16:22 FRA4PicoScope measurement
17:40 LR low-pass filter
21:27 Resistor with 10 Ω
22:28 FRA4PicoScope measurement
23:48 Discussion of the DC gain