Tutorial 4
1. Calculate the AC and DC Sensitivity and the value of the multiplier resistor required to
limit the current to the full scale deflection current in the circuit shown in Figure 1. All
diodes have a forward resistance of 300 Ω and infinite reverse resistance.
Figure 1:
2. In one practical session, students are required to set the input voltage of the AC
network as V(t)=12sin(628.4)t
by using signal generator. The signal is required to
display on the oscilloscope screen. If the vertical section and horizontal section was
set to 4 V/div and 2ms/div, draw the waveform that displayed with the proper label.
Determine the root mean square (rms) value and frequency of the waveform. Explain
the important synchronization of horizontal and vertical deflection of the signal and
identify the section that controls the synchronization.