4-12
voltage across the load resistor is nearly 1000 volts. With both circuits using the same transformer, the
bridge rectifier circuit produces a higher output voltage than the conventional full-wave rectifier circuit.
Figure 4-9A.—Comparison of a conventional and bridge full-wave rectifier. CONVENTIONAL FULL-WAVE
RECTIFIER
Figure 4-9B.—Comparison of a conventional and bridge full-wave rectifier. FULL-WAVE BRIDGE RECTIFIER
Q11. What is the main disadvantage of a conventional full-wave rectifier?
Q12. What main advantage does a bridge rectifier have over a conventional full-wave rectifier?
FILTERS
While the output of a rectifier is a pulsating dc, most electronic circuits require a substantially pure
dc for proper operation. This type of output is provided by single or multisection filter circuits placed
between the output of the rectifier and the load.
There are four basic types of filter circuits:
Simple capacitor filter
LC choke-input filter
