AdvancedA-004-004-008
In a regulated power supply, four diodes connected together in a BRIDGE act as:
A
Answer
Measurements and troubleshooting
Type
A
a rectifier
B
equalization across the transformer
C
matching between the secondary of the power transformer and the filter
D
a tuning network
Answer Notes
A bridge arrangement of four diodes is known as a bridge rectifier. Its primary function in a power supply is to convert alternating current (AC) into pulsating direct current (DC).
The four diodes are arranged so that during both the positive and negative half-cycles of the AC input, current is directed to flow in only one direction through the load. This provides full-wave rectification without the need for a center-tapped transformer.
A diode bridge does not perform tuning, impedance matching, or equalization across the transformer. Those functions belong to capacitors, inductors, or specialized matching networks.
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The output capacitor, in a power supply filter used to provide power for an SSB or CW transmitter, will give better dynamic regulation if:
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In a regulated power supply, components that conduct alternating current at the input before the transformer and direct current before the output are: