Bridge Rectifier Circuit With Capacitor Filter. The step down transformer converts the ac mains supply of 230v to 12v ac. In the below circuit diagram the capacitor filter is connected across the load resistor rl.
Figure 3 bridge rectifier with load resistor and filter capacitor this process is known as filtration and the capacitor acts as a filter. The filter normally used in the bridge rectifier is a capacitor filter. This waveform shape is now much closer to a pure dc voltage waveform.
The filter normally used in the bridge rectifier is a capacitor filter.
The amount of ripple voltage that is superimposed on top of the dc supply s voltage by the diodes can be virtually eliminated by adding an improved π filter pi filter to the bridge rectifier s output terminals. In the below circuit diagram the capacitor filter is connected across the load resistor rl. The capacitor has improved the pulsating nature of the output voltage and it will now only have ripples. At the same time diodes d2 and d4 are reverse biased.
