Amplifier Flashcards
1
Q
Find the transfer band of amplifier
A
- create another column called dB
= 20 log (Uout / Uin) - make graph of frequency (x) and dB (y)
- make small table for another series
- y axis: biggest dB - 3
- x axis: choose smallest and biggest x
Find lower and bigger dB on graph
- double tap on x axis
- edit bounds: lower max to zoom in
- find range of where two series intersect
*answer in Hz
2
Q
Can it be used for ECG
A
No because the transfer band of the ECG is from 0.1 to 100 Hz and the amplifier only covers from x Hz so it cannot be used
3
Q
How does the transfer characteristic change if we use negative feedback
A
- wider transfer band (Frequency)
- lower decibel (gain)
