Exp. No.1 Part:2 FULL-WAVE RECTIFICATION

Bridge Network
The dc level obtained from a sinusoidal input can be improved 100% using a process called full-wave rectification. The most familiar network for performing such a function appears in Fig with its four diodes in a bridge configuration. During the period t = to T/2 the polarity of the input is as shown in Fig.. The resulting polarities across the ideal diodes are also shown in Fig. to reveal that D2 and D3 are conducting while D1 and D4 are in the “off” state. The net result is the configuration of Fig, with its indicated current and polarity across R. Since the diodes are ideal the load voltage is vo _ vi, as shown in the same figure.
Center-Tapped Transformer
A second popular full-wave rectifier appears in Fig. with only two diodes but requiring a center-tapped (CT) transformer to establish the input signal across each section of the secondary of the transformer. During the positive portion of vi applied to the primary of the transformer, the network will appear as shown in Fig..