Transcript
Exercise rectifier
6
A full-wave center-tapped rectifier circuit is shown in Fig. . Assume that for each
diode, the cut-in voltage, V = 0.6V and the diode forward resistance, rf is 15 .
The load resistor, R = 95 . Determine:
• peak output voltage, Vo across the load, R
• Sketch the output voltage, Vo and label its peak value.
25: 1
125 V (peak voltage)
( sine wave )
Exercise rectifier
17
Example . What value of series resistor is required to limit the current through a LED to 20 mA
with a forward voltage drop of 1.6 V when connected to a 10V supply ?
Example . What is current through the LED in the circuit shown in Fig. 7.5 ? Assume that voltage
drop across the LED is 2 V.
Solution.