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These electronic ballasts require an ac—dc converter.

Low ripples in the output DC signal• 4 4-pin Regulator B : This is the most common type found on motorcycles with single-phase winding.

The car would show an occasional spike of near 200V as indicated by an o-scope due to coil sand points operating.

So the diode will block the negative cycle.

These rectifiers are further classified into controllable and uncontrollable rectifiers.

Because of these reasons practical implementation of these circuits practically is not possible.

In this way, it is further divided into two types 1 Positive half wave rectifier In this, the rectification process considers the positive half cycle of the alternating current AC and this positive half is only converted into direct current DC.

The diode is connected in series with the load resistor.

Fig shows the circuit diagram of half wave controlled rectifier with resistive load.