13
Now, check what happens when you
fl
ip the switch from single phase to dual phase recti
fi
cation.
Flip the switch back and forward, to clearly see the difference between both settings.
A little theory:
As you can see, the ‘interruptions’ we have noticed with single phase recti
fi
cation are gone. As opposed
to single phase recti
fi
cation, both halves of the sine wave are used. Instead of a single diode, we use 4
diodes to make a ‘diode bridge’
Single diode
Diode bridge
Exercise:
In experiment 3, we have learned how to measure the frequency of a repeating waveform.
Can you measure the period and frequency of both the single phase and dual phase recti
fi
ed signal?
(Answer: 10ms/100Hz or 8.33ms/120Hz)
n.
t
t
U
U
tt
tt
U
U
tt
tt
U
U
U
U
Recti
fi
ed AC, dual phase