Circuit Diagram
The AC voltage to be rectified is connected between the primary of the transformer
To one coil of the secondary, the p junction of the diode is connected
The output is measured across the load resistance RL
Input and output
➤ Case 1
➤ Case 2
The above process is repeated. Thus , we have current only in the positive half of the cycle. Hence, if is called as half-wave rectifier
The output signal is not continuous and available as bursts. Hence, this is not of much use.
➤ Circuit Diagram
➤ Input and Output
➤ Case 1
➤ Case 2
We observe that one of the diode conducts and the flow of current across the load resistance is in the same direction Also, current flows during both cycles of the input AC voltage. However, the output though unidirectional has ripple contents. Ripple contents indicate both AC and DC components
We can get only the DC component by passing it through a filter circuit
The filter circuit consists of Resistance and Capacitance
➤ Circuit Diagram
➤ Working
Problem: In half-wave rectification, what is the output frequency if the input frequency is 50 Hz. What is the output frequency of full wave rectifier for the same input frequency?
Solution: Half-wave rectifier –The output voltage is obtained is once in one cycle of input voltage, hence output ripple frequency after half-wave rectification = 50 Hz
Full-wave rectifier – For one cycle of input voltage, we get output twice in the same direction. Hence, the output after full wave rectification = 100 Hz
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1. What is a rectifier? |
2. How does a junction diode function as a rectifier? |
3. What is the difference between a half-wave rectifier and a full-wave rectifier? |
4. What are the advantages of using a full-wave rectifier over a half-wave rectifier? |
5. Can a junction diode be used as a rectifier in high-power applications? |
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