Three Stage Amplifier Baseline (No Fault) Circuit Animation.
The Amplifier below is designed for a voltage gain of 3000 to 4000 over a frequency range of 1kHz to a 100 kHz. The circuit is tested below with a 1mV signal at 100 Hz, 1 kHz, 10kHz, 100 kHz, 1Mhz. The output voltage must be between 3 and 4 volts AC at the 1k, 10k, and 100k frequencies and less than a 1 volt AC for frequencies of 100 Hz and 1 MHz. Observe Baseline operation recorded below (GIF animation) and than troubleshoot circuit faults 1 - 4 below by identifying failed components. Only a single failure is inserted into a circuit at a time, but you may not always be able to fault isolate to a single component.
In setup below Rload , Ammeters, Vcc source and 1mV variable frequency source are part of test bench all other parts belong to Unit Under Test (UUT).
Fault
1 Fault 2
Fault 3 Fault
4 Print a Schematic
Changing Data forces student to collect
data one or two test point at a time. This is tedious, but not as
difficult as collecting test point data is in the real world. If
you wish to download free stop action animations,
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Three
Stage Amplifier: Listen to MP3
Audio Amplifier Gain: Listen
to MP3 Audio
Open MP3
Lecture in New Window, then minimize
New Window and continue to listen and view animation.
Notes: All transistors are BC107A [Beta = 180]
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